. Annals of the Lyceum of Natural History of New-York. Science. 86 JSTotes on Species of Co?'hiculadce. The shell is oval-suborbicular, nearly equilateral, and some- what inflated. The anterior side is rounded, the posterior is subobtuse. The beaks are small, they curve inwardly and are approximate. The valves are solid. The interior is white. The hinge is broad. The cardinal teeth are narrow and diver- gent, the two principal ones are bifid. The anterior lateral tooth is conical and the posterior one somewhat elongated and flattened. The strias are more or less obsolete. The epidermis is ligh
. Annals of the Lyceum of Natural History of New-York. Science. 86 JSTotes on Species of Co?'hiculadce. The shell is oval-suborbicular, nearly equilateral, and some- what inflated. The anterior side is rounded, the posterior is subobtuse. The beaks are small, they curve inwardly and are approximate. The valves are solid. The interior is white. The hinge is broad. The cardinal teeth are narrow and diver- gent, the two principal ones are bifid. The anterior lateral tooth is conical and the posterior one somewhat elongated and flattened. The strias are more or less obsolete. The epidermis is light green and polished. The ligament is narrow, elongated, and not prominent. This species is less inflated and less orbicular than Cyrena sphcerica, and it is more inflated and less produced than either Cyrena nitida, Papuana, or Bernardiiana. 3. Cyrena Siaawica, Prime. Cyrena Siamica, Prime. Acad. K S. Phil. Proc. 126. 1861. Prime Cat. 6. 1863. C. testa ovato-transversa, subtrigona, inequilateral], subinflata ; postice Fig. Cyrena Siamica. subtruncata, antice valde declivi, in medio convexa'; epidermidc fusca. 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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