Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 62. (Budapest 1970)

Nagy, I. Z.: Lower Liassic molluscs from the Mts. Mecsek, Hungary

edge. The specimen agrees with the type, being merely somewhat flatter. The fine growth lines are well visible, becoming stronger around the aperture. The umbilicus is completely closed. The aperture is missing, but the completely everted state of the inner lip is still observable. Superfam.: Neritacea RAFINESQUE, 1815; Fam.: Neritidae RAFINESQUE, 1815; Genus: JVcritomn MORRIS, 1849; Subgenus: Neridomus MORRIS & LYOETT, 1851. Neri Ionia (Neridomus) aff. Hasina (DUNKER) Examined material: A fragment, partly with shell, of an about 7 mm thick specimen. Pécs, Thommen shall, leg. R. STREDA. M 63. 1318. Remarks: The considerably worn small specimen may be assigned to the Formenkreis of the above species. Fam.: Piirpiirinuhic ZITTEL, 1895; Genus: Tretospira KOKEN, 1892. Tretospira carinata TERQUEM Plate I, Fig. 2. 1913 Tretosira carinata TERQUEM. — Pal. ír. terr. jura, III, p. 174, PL 10, Figs. 14-17. Examined material: A single specimen: a pyritized mold, partly with shell. Pécsbányatelep, Széchenyi shaft, leg. J. BÖCKH, 1873. Hettangian-Sinemurian, following the coal bed. Spire 33 mm high, its greatest, width 21 mm. M 69.367. Remarks: The specimen displays five, rapidly growing whorls; the last one is very robust, larger than the entire spire. The edge towards the apex of the whorls is slightly declivous to the margin. This latter is sharp, distinct, and even slightly recurving. The last whorl is concavely constricted immediately below the margin. The aperture is largely rhomboidal. The shell shows no sculpture, but the growth lines are discernible in several places. The aperture is thick and prochnate. The genus had already been reported from the Mts. Mecsek, e.g. by KLEIDORFER (p. 54), published and illustrated under the name Turbo. Superfam.: Cerithiacca FLEMTNO, 1822; Fam.: Procerithiidae COSSMANN, 1905; Genus: Cryplaulax TATE, 1869 ( = Pseudoeerithium COSSMANN, 1884). Cryptaulax cfr. aininta GOLDFUSS Examined material: A badly preserved specimen (7 mm long mold); Ffossziihetény, shale dump M 69.265. Remarks: The "cerithial" rows of tubercles, formed from the interlacing of the longitudinal and transverse ribs, are observable on the fragment. It is most similar to KUAN'S forms descrihed from Kremmeldorf (1935; PI. 9, Fig. 4; PI. 10. Fig. 36). The transverse and longitudinal costae vary highly, their taxonomic evaluation should be most circumspect.