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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    Venericardia.—Shell equivalve, inequilateral, suborbicular, mostly with longitudinal radiating ribs. Two oblique cardinal teeth, standing the same way. Plate XXI. Fig. 2- V. imbricata.—Fossil. [Mr. G. B. Sowerbv’s Cabinet.] CARDIACEA._5 Genera. Cardinal teeth irregular, either in their form or in their situation; and in general accompanied by one or two lateral teeth. Cardium.—Shell equivalve, rather heart-shaped; the beaks prominent; the internal margins of the valves dentated or plaited: hinge with four teeth in each valve; the two cardinal approximate and oblique, articulating cross-wise with the two in the other valve; and two rather distant entering lateral teeth. (1) Shell with no particular angle on the beaks, and the anterior side at least as large as the posterior. Plate VIII. Fig. 1. (a) C. rusticum. (Idem.—Chem.) [Mrs. Mawe’s Cabinet.] (&) Hinge of ditto. (2) Shell with the beaks carinaled, or having an angle, and the posterior side often larger than the anterior. Plate VIII. Fig. 2. C. retusum. (Idem.—Linn.) Cardita.—Shell free, regular, equivalve, inequilateral: hinge with two unequal teeth, one short, straight, situated under the beaks; the other oblique, marginal, and ex¬ tending under the corselets. (1) Shell subcordate, or oval, more transverse than longitudinal. Plate VIII. Fig. 3. (a) C. sulcata. (Chama antiquata.—Linn.) (b) Hinge of ditto. (2) Shells more longitudinal than transverse. Plate VIII. Fig. 4. C. calyculata. (Chama calyculata.—Linn.) Cypricardia.—Shell free, equivalve, inequilateral, obliquely or transversely elongated. Three cardinal teeth under the beaks, and one lateral tooth extending under the corselet. Plate VIII. Fig. 5. (a) C. Guinaica. (Chama oblonga.—Linn.) (6) Inside of ditto. Hiatella.—Shell equivalve, very inequilateral, transverse, gaping at the superior mar¬ gin : hinge with one small tooth in the right valve, and two oblique teeth, a little larger, in the left valve. Ligament external. Plate VIII. Fig. 6. (a) H. arctica. (Solen minutus; Mya arctica.—Linn.) (b) Inside of ditto. Isocardia.—Shell equivalve, heart-shaped, ventricose, the beaks distant, diverging, spi¬ rally turned on one side: two flat, entering, cardinal teeth, one of them curved,