O. Gy. Dely szerk.: Vertebrata Hungarica 23. (Budapest, 1989)

Topál, Gy.: Tertiary and Early Quaternary remains of Corynorhinus and Plecotus from Hungary (Mammalia, Chiroptera) 33-55. o.

Plecotus (Corynorhinus) sp. The investigation of the rich bat material excavated in Osztramos Loc. 9 furnished besides two species of Plecotus (Plecotus) a P. (Corynorhinus) sp. The small number and fragmentary state of the latter, however, did not permit an exact identification of the species and a direct comparison with the specimens from Podlesice, the population of the closest geological age, was not performed in the course of this study. List of specimens deposited in the collection of the Palaeontological Department, Hungarian Natural History Museum, Budapest. Reg. No. of the maxillary pieces: V. 86. 10., ser. No. 44, right maxillary fragment with M2/ and alveole of M3/; ser. No. 47, right maxillary fragment with C and alveoli of I1/-I2/, P2/; ser.No. 46.,right maxillary fragment with P4/-M1/-M2/ and alveole of P2/; ser. No. 45, left maxillary fragment with C-P2/-P4/; Reg. No. of mandibular pieces V. 86. 11. : ser. No. 52, rigth mandibular fragment with 1/2-1/3, P/3-P/4-M/l-trigonid of M/2 and alveoli of 1/1, C-P/2; ser. No. 50, left mandibular fragment with M/l-M/2 and alveoli of I/l-P/4; ser. No. 51, left mandibular fragment with ascending ramus (damaged coronoid process); ser.No. 48, left mandibular ascending ramus; ser. No. 96, left mandibular fragment with alveoli of P/2P/4; ser. No. 94, left mandibular fragment with alveoli of I/l-P/4. For measurements, see Tables 1, 2. Comparisons with the other fossil specimens revealed a few characters of this animal. As one can infer from the measurements of the available pieces that this animal had a lower rostrum at the anterior root of the P4/ than even P. atavus had, that is, the upper edge of its anteorbital foramen is closer to the edge of the maxilla than either in P. atavus or in P. crassidens. Its anteorbital foramen is greater than those of the other two fossil species. The width of the anteorbital bridge equals that of the greatest P. atavus. C-P4/ alveolar length equals that of P. atavus

. Alveoli of II/ and 12/ do not show such a great size difference as in P. crassidens. Both basal length and basal width of the upper C are definitely greater than those of P. townsendii and probably close to those of P. atavus. The crown of the only available P2/ is identical to that of P. crassidens and not to that of P. atavus. Its alveole seems to differ from that of P. crassidens where it is antero-posteriorly shortened and also seems to be somewhat greater than that of P. crassidens. Basal length of P4/ is smaller than that of P. atavus and approaches that of P. crassidens with no overlap, that is, coincides with that of P. townsendii. Approximately the same is true for the width of P4/, however, there is a considerable overlap with P. atavus. The talon of P4/ in the Osztramos animal is especially wide and extends both anteriorly and posteriorly. It is directed anteriorly and the labial portion of P4/ is drawn back from the canine further away than in P. cras sidens, where the talon is nearly perpendicular to the main axis of the skull. It is very interesting that also in the morphology of the P4/ the present sample is closer to the Miocene species with a deep incision on its anterior border. There is a sharp difference between the Osztramos animal on the one hand, and P. crassidens as well as P. atavus on the other hand in the thickness of talon of Ml/ and M2/. The lingual portion of the molars is bulky in P. cras sidens and slender in the Osztramos form. The measurements of the upper Ml/ and M2/overlap, still the means are closer to those of P. townsendii than to those of P. atavus (see Table 1). Curiously enough the height of the coronoid process is lower than either that of P. atavus or that of P. crassidens. One cannot attach importance to this difference yet, because of the paucity of the available remains. The only comparable lower tooth-row length, the C-P/4 alveolar length equals that of P. atavus

, thus it is greater than in P. crassidens. The only P/3 is longer basally than in any specimens of the two other fossil species compared in this study. Its width is slightly greater even than in the only existing P. atavus and falls into the range of this measurement in P. townsendii. The basal length of P/4 equal to that of P. atavus, that is, definitely greater than in P. crassidens. Thus in many respects the Osztramos Loc. 9 species is rather close to the new species from Polgárdi, in a few aspects, however, it is reminescent of P. crassidens. Plecotus (Plecotus) abeli Wettstein, 1923 The specimens listed and discussed below originate from Beremend Loc. 17 and Beremend Loc. 16, both of the Betfian substage of the Lower Pleistocene. As it was stated before,