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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    (frlrtJCUtfj <£la00u CONCHIFEEA. Shell always bivalve, wholly or partly covering the Animal; sometimes free, sometimes fixed: the valves mostly joined at the margin by a hinge or ligament. The shell is sometimes enlarged by testaceous, accessory pieces, not belonging to the valves. This class is divided into Two Orders, viz. Conchifera Bimusculosa, and Conchifera Unimusculosa. ORDER I_CONCHIFERA BIMUSCULOSA. THE shell presents, in the interior, two separate and lateral muscular impressions: this order is divided into Four Sections, viz. C. crassipeda, C. tenuipeda, C. lamellipeda, and C. ambigua or the Chamacea SECTION I_CONCHIFERA CRASSIPEDA. Shell gaping at the sides when shut. This section contains Four Families_Tubicolaria, Pholadaria, Solenacea, and Myaria. TUBICOLARIA_6 Genera. Aspergillum.—Sheath tubular, testaceous, gradually attenuating to the anterior end, which is open; the other extremity larger, and club-shaped; having two valves incrusted on one side of the club. The disk at the end of the club, convex, and perforated with subtubular holes, having a fissure in the centre. Plate II. Fig. 5. A. Javanum. (Serpula penis.—Linn.) [Mrs. Mawe’s Cabinet.] 6. Front view of the disk. Clavagella.—Sheath tubular, testaceous; the anterior end attenuated and open, the posterior club-shaped, ovate, and rather compressed with spinous tubes; one valve fixed in the side of the club, the other free in the tube. Plate II. Fig. 7. («) C, aperta. (Sowerby.) [British Museum.] (l) The free valve.