. College collection of palaeontology. LAMELLIBRANCHIATA. 123 No. 341. Gervillia socialis. Lye. and Mor. This genus is entirely fossil, ranging from the Carboniferous to the Creta- ceous; 37 species being known. From the Muschelkalk, Munchingen, Wur- temberg. No. 342. [667, Cast]. Qervillia anceps, Deshayes. A characteristic bivalve fossil, from the Lower Greensand of Atherfeld, Lsle of Wight, England. Size, 8 x 2. No. 343. Lima rigida, Deshayes. The type genus of the Limidae; 300 species fossil, ranging from the Car- boniferous. From the Calcareous Grit (Jurassic), Oxford, England. No. 344. P
. College collection of palaeontology. LAMELLIBRANCHIATA. 123 No. 341. Gervillia socialis. Lye. and Mor. This genus is entirely fossil, ranging from the Carboniferous to the Creta- ceous; 37 species being known. From the Muschelkalk, Munchingen, Wur- temberg. No. 342. [667, Cast]. Qervillia anceps, Deshayes. A characteristic bivalve fossil, from the Lower Greensand of Atherfeld, Lsle of Wight, England. Size, 8 x 2. No. 343. Lima rigida, Deshayes. The type genus of the Limidae; 300 species fossil, ranging from the Car- boniferous. From the Calcareous Grit (Jurassic), Oxford, England. No. 344. Pecten opercularis, Lam. This genus, the type of the Scallop family (Pectinidse), has 450 extinct species, beginning in the Devonian, and 200 still living. Quaternary, Palermo, Sicily. No. 345. Pecten expansus, Dall. Tertiary, San Diego, California. No. 346. Pecten (Neithea) quadricostata, Sow This typical Cretaceous shell, from College Hill Texas, closely resembles Janira Neocomiensis of d'Or bigny, from the Low^er Cretaceous of France. No. 347. Ostrea Marshii, Sow. The family Ostreidte have shells unequivalved and unequilateral, and one muscular impression. They are commonl}^ regarded as the lowest of the Lamellibranchs. This type genus began in the Carboniferous and has supplied 200 extinct species and 70 living. From the Lias, Stilfenberg, Wur- temberg. No. 348. Ostrea larva, Lam. From the Rotten Limestone (Cretaceous), Alabama River. No. 349. Ostrea,. From the Raised Beaches (Quaternary), Gebel Zeit, Gulf of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward's Natural Science Establishment, inc. Rochester
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