. College collection of palaeontology. MOLLUSCA. Pleurotoma demidiata, Broc. This genus, of which 500 species are now living, has a fusiform shell with a long canal, and eyes at the base of widely-separated tentacles. It is the type of the family Pleurotomldse. Miocene, Soos, Austria. No. 267. Pleurotoma ttirricula, Broc. Miocene Tertiary, Baden. No. 268. Conus striatulus, Broc. The large family Conidae are principally tropical. This genus dates from the Cretaceous. Upper Pliocene, Colli, Artesi, Italy. No. 269. [608, Cast]. Rostellaria carinata, Mant. This genus belongs to the family Strombid
. College collection of palaeontology. MOLLUSCA. Pleurotoma demidiata, Broc. This genus, of which 500 species are now living, has a fusiform shell with a long canal, and eyes at the base of widely-separated tentacles. It is the type of the family Pleurotomldse. Miocene, Soos, Austria. No. 267. Pleurotoma ttirricula, Broc. Miocene Tertiary, Baden. No. 268. Conus striatulus, Broc. The large family Conidae are principally tropical. This genus dates from the Cretaceous. Upper Pliocene, Colli, Artesi, Italy. No. 269. [608, Cast]. Rostellaria carinata, Mant. This genus belongs to the family Strombidse, and was nearly twenty times more abundant in former geological times than in our own; during the Creta- ceous period it was represented by some very ex- treme forms, of which the present specimen is one. From the Gault, Folkestone, No. 270. Rostellaria fissurella, Lam. Eocene, Grignon, France. No. 271. Aporrhais pes-pelicani. Lam. Only four species are living of this genus which has existed since the early Jurassic. It belongs to the Strombidse. Quaternary, Palermo, Sicily. No. 272. Cassidaria echinophora. Lam. 30 fossil forms of this genus of the Cassidse family are known from the Cretaceous and later strata. Postpliocene, Ficarizzi, near Palermo, Sicily. No. 273. Pyrula bulbus, d'Orb. The genus is named from the thin, pear-shaped shell. Eight species are still living. It is found in Cretaceous strata. Family Doliidis. Eocene, Grignon, 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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