Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 11. 1983. (Budapest, 1983)

studied recent _M. mystacinus and equals that of some South-east Asian M. siligorensis (Horsfield, 1855) and probably M. caliginosus (Tomes, 1859). These have, however, certainly shortened premolar rows, as well as probably has M. ikonnikovi Ognev, 1912, which was not| studied here. The width of P4 in three specimens of estramosensis sp. n. constitutes 66-71% of P

4 length, in two siligorensis 71-79% and in 25 mystacinus 69-87%, respectively. While in the M\ and M

2 lengths there is overlap between M. estramosensis sp. n. and mystacinus (the means are smaller in the fossil animal), the Mi and M

2 talonid widths are absolutely smaller in the new species. The M3 length of estramosensis sp. n. (4 specimens), as well as the M3 trigonid and talonid widths are absolutely smaller than those of any mystacinus studied and only comparable with those of siligorensis. Among the scattered remains, the only maxillary fragment seems weaker than that part of M. mystacinus

. Its molars are somewhat smaller with no indication of hypocone and thus, with rounded lingual margin. The paraconule is hardly represented and just a faint trace of postprotocrista-premetaconule wing is seen. One can conclude that we have here a species - unfortunately rare and badly represented in the study-material - in many respects unspecialized, with well diverged characters from the studied small-sized recent species. Myotis cf. blythi (Tomes, 1857) A few fragments - which belong to a till now fully unknown size-category of Pliocene Myotis - unfortunately do not permit a detailed taxonomical evaluation. Among hundreds of remains of other Myotis

, a left mandibular fragment (Plate II, Fig. 8) with P4Mo dentition, three other mandibular fragments and three maxillary fragments where P

4

, Ml and M

2 are represented, total the whole material from Osztramos Locality 9. The available measurements are as follows: height of mandibular ramus under Mi 2.64, P

4-M

3 length 7.30, M^Mg length 6.05, cross-section length of P

4 1.36, crosssection width of P

4

, Mj length 1.90-2.15, M

1 talonid width 1.31-1.36, M

2 length 2.15, M

2 talonid width 1.40-1. 54, M

3 length 3.03, Mg trigonid width 1.22, M

a talonid width 0.92; cross-section length of P

4 1.68, cross-section width of P

4

,

1*59 antero-posterior length of M

1 2.08, width of M^ between lingualmost and metastylar margins 2.82, width of M

1 between lingualmost and parastylar margins 2.41, antero-posterior length of M

2 2. 08-2. 27, width of M between lingualmost and metastylar margins 3.00-3.22, width of M

2 between lingualmost and parastylar margins 2. 86-2. 95. The only comparable fossil species is Myotis baranensis Kormos, 1934 which, however, has evidently smaller measurements. At the same time the P4-M3 length of our fossil specimen fully equals that of _M. blythi oxygnathus (Monticelli, 1885). The fossil P

4 shows the same length as that of b. oxygnathus

, though, narrower than in the recent form. Its buccal cingulum has a strong undulation. While the M^ agree in both animal, the fossil M

2 has absolutely narrower talonid than that of the recent one. The Mg in the fossil specimen is smaller than that of the recent species, and its talonid compared to trigonid is very wide. The latter seems to be a primary and more ancient feature. The alveoli of the upper one-rooted premolars are tightened and that of P is well inside of the main axis of toothrow. KORMOS* (1934) old idea regarding the origin of _M. oxygnathus and his supposition about M. baranensis as ancestral to oxygnathus is no more tenable. The above findings prove the presence of oxygnathus-like blythi already in the Middle Pliocene of Europe. ACKNOWLEDGEMENTS I am indebted to Dr. K. KOWALSKI, Krakow, Dr. J. Th. GROISS, Erlangen, and Dr. D. JANOSSY for their courtesy in permitting the study and loan of the material in their care. I thank Dr. A. DEMETER, Budapest, for the computer analysis.