An illustrated introduction to Lamarck's conchology; contained in his Histoire naturelle des animaux sans vertèbres: being a literal translation of the descriptions of the recent and fossil genera / Accompanied by ... plates. By Edmund A. Crouch, F.L.S.

  • Edmund A. Crouch
Date:
1826
Catalogue details

Licence: Public Domain Mark

Credit: An illustrated introduction to Lamarck's conchology; contained in his Histoire naturelle des animaux sans vertèbres: being a literal translation of the descriptions of the recent and fossil genera / Accompanied by ... plates. By Edmund A. Crouch, F.L.S. Source: Wellcome Collection.

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    ; Ctoclftfj eiasSjs. MOLLUSC A. Body sometimes naked, either destitute of any solid internal parts, or inclosing a shell or other hard substance, and sometimes provided externally with a shell covering or sheath¬ ing, but is never composed of two opposite valves united by a hinge. This Class is divided into Five Orders, viz. Pteropoda, Gasteropoda, Trachelipoda, Cephalopoda, and Heteropoda. ORDER I. PTEROPODA.—.6 Genera. Some only are furnished with a thin, cartilaginous or corneous shell. i t Hyauea.—Shell corneous, transparent, ovate-globose; tridentated posteriorly; open at the summit, and at the two posterior sides. Plate XIII. Fig. 7- H. tridentata. (Monoculus telemus?—Linn.) Clio.—This genus has no shell. Cleodora.—Shell gelatinous, cartilaginous, transparent, in shape of a reversed pyramid, or lanceolate, truncated and open at the summit. Plate XIII. Fig. 8. C. pyramidata. (Clio pyramidata.—Linn.) Limacina.—Shell thin, fragile, papyraceous, spiral; the whorls re-united in a discoidal manner, like the Planorbis. Plate XIII. Fig. 9. (a) L. helicialis. (Clio helicina.—Gmel.) [British Museum.] Cymbulia.—Shell gelatinous, cartilaginous,very transparent, crystalline, oblong, in shape of a shoe, truncated at the summit; aperture lateral and anterior. Plate XIII. Fig. 10. C. Peronii. [Icon. Encyc. Method, pi. 464. fig. 4 b.~] Pneumodermon.—This genus has no shell.