. Annals of the Lyceum of Natural History of New-York. Science. Notes on Species of Coroiculadce. 231 rounded. The beaks are small. The valves are delicate and the color of the interior is violet. The epidermis is blackish- green. The stria? are obsolete. The hinge is narrow and slight. The lateral teeth are long, narrow, and subequal. The Batissa triquetra is somewhat allied to Batissa CJtil- drencie from the Philippines; it is, however, fuller, more trigonal, transversely shorter, and more delicate. 4. Batissa ponderosa, Prime. Bitissa ponderosa, Prime. Bost. Soc. Nat. Hist. Proc. viii. 273.

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. Annals of the Lyceum of Natural History of New-York. Science. Notes on Species of Coroiculadce. 231 rounded. The beaks are small. The valves are delicate and the color of the interior is violet. The epidermis is blackish- green. The stria? are obsolete. The hinge is narrow and slight. The lateral teeth are long, narrow, and subequal. The Batissa triquetra is somewhat allied to Batissa CJtil- drencie from the Philippines; it is, however, fuller, more trigonal, transversely shorter, and more delicate. 4. Batissa ponderosa, Prime. Bitissa ponderosa, Prime. Bost. Soc. Nat. Hist. Proc. viii. 273. Prime Cat. 5. 1863. B. testa ovato-orbiculari, oblique inaequilaterali, ventricosa, crassa, Fig. Batissa ponderosa. solida; latere antico rotundato, postico latiore, obtuso ; umbonibus par-. 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 Lyceum of Natural History (New York, N. Y. ). New-York :

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