402 CRETACEOUS PELECYPODA 



232.—-/. amtus, Con.j Lynches Exped.^ p. 226^ from Palsestine ; Fraas considers this to be 

 identical with /. Lamarcki, 



233-235. — /. syriacuSy elevatm, and Lynchii (ibidem) are also noted by Conrad from Palsestine. 



236-240. — /. Crijosianus, multiplicatus , diversus, Qeinitzianus , lahiaUis, and simplex^ Gervillea 

 solenoides, and Mel'ina valida occur in the South Indian cretaceous rocks ; three of the species are 

 also European and have been already referred to. 



C. VVLSELLINyE. 



241. — C/mlmasia turoniensis,"^ (Vulsella) , Duj._, Mem. Soc. Geol. de France; 11^ p. 228^ (see 

 p. 397). 



242-243. — Vulsella aviculoides and pernoides, Coq. (see p. 397). 



244. — Nayadina Heberti, M.- Chalmas^ (see p. 397). 



245-246. — r^/^^^^« Z^^^-^^^^, Miinst., (apud Groldf., Petrsef. Germ., pi. 107, %. 10), and 

 V. trigona, Schafhseutl, (Siid-Bayern^s Leth. Geog., 1863, p. 152,) both appear to belono* to 

 Nayadina, The former species was identified by d''Archiac with one from the eocene beds at 

 Biaritz; this last, is an inequivalve shell, while Miinster^s species is equi valve. Schafhseutl 

 says that it is a cretaceous fossil, and it certainly shows marked relations to Nayadina Hehei'ti, 

 D'Orbigny (Prod. II, p. 327,) who regards' Miinster's and d'Archiac's shells as the same, 

 transfers them to the genus Ostrea under the new specific name 0. Hersilia, d''Orb. 



'IM.^Vnls. p-etiosa, Eich., (Leth. Eoss., xme livr., p. 501,) has the general form of Nayadina, 

 but the valves appear to be somewhat unequal and flattened. 



PSEUDO-MONOTIS, Bey rich, 1862, (see p. 389). 



1. PsEUDO-MONOTis [Oxytoma] semiglobosa, StoUczha, PI. XXVI, Pig. 1. 



Fseudo-m, testa sinistra parva, globosa^ tumida^ sub-rotundata, paulo ohliqua^ 

 inceqidlaterali^ apice incurvo, lato ; margine cardinali recto^ auricula antica brevi^ 

 obtusa^ postica fut videturj paulo prolongata, angusta^ infra distincter insinuata ; 

 superficie costis novem radiantihus, lateraliter paulo distantioribus quam in medio, 

 et striis concentricis filiformibus ac confertissimis ornata. 



The single valve, though not quite perfect, shows by its very tumid rounded form 

 that it belongs to a species distinct from any other known from cretaceous deposits. 

 The ears appear to be small, like in Fs, inter striata, Eichw. ; the anterior is 

 short, tumid, not distinctly separated from the valve; the posterior narrow and 

 deeply emarginate below ; it seems to have been only a little longer than shown 

 in the figure, its point being broken off. There are nine radiating, rather sharp ribs 

 on the valve, those at the sides diverge slightly more than those in the middle ; no 

 intermediate ribs are present, but the surface is very densely covered with filiform 

 striae of growth. 



io6?(%/i^y.— Karapaudy, in a conglomeratic sandstone. 



'Formation, — Arrialoor group. 



* I do not think that the identification of Dujardin's species with Woodward's Ostrea concentHca 

 (Geol., Norfolk, 1833, p. 48, pi. vi, fig. 5,) has been satisfactorily proved, hut the latter is to all appearance the same as 

 O. Gehrdensis, EoDmer, (Nordd. Kreidef., pi. viii, fig. 1). Coquand (Monog. Ostr. cret., 1869, p. 195,) seems to me 

 to go too far with his identifications of species resembling each other in external characters, while the true identity can 

 only be proved by the study of the internal structure of the valves. 



