Читать книгу The Conchologist's First Book онлайн

25 страница из 26

A shell with epidermis is represented in Plate III. fig. X; and the effect of the epidermis removed.

All other protuberances, furrows, &c., will be described at the end of this work in a Glossary of Terms used in the Science.

ssss1

Fig. 1. Hinge of the Unio pictorum, a Primary tooth, c c double teeth.

Fig. 2. Hinge of the Solen. b Lateral teeth.

Fig. 3. Hinge of the Lucina radula, a a Primary teeth, n cartilage.

Fig. 4. Hinge of the Cardium. b Lateral tooth, d d middle teeth, l l spines.

Fig. 5. Hinge of the Lutraria.

Fig. 6. Inside of both valves of the Donax trunculus. A is the left valve, and B is the right valve, b lateral teeth, e primary complicated tooth, or cleft in the middle, m m crenulated margin.

Fig. 7. Hinge of the Venus, a a Primary teeth.

Fig. 8. Hinge of Spondylus gæderopus, f f incurved teeth.

Fig. 9. Hinge of Isocardia Cor.

Fig. 10. Hinge of the Pectunculus, k k numerous small teeth; the distinguishing characteristic of the Family Arcacea.