PLATE 34. 
Fig. 1. 189. 1. Nucula levata. (Pag- 150.) 
1 a, b. Left valve and posterior view of a specimen of the prevailing form in New-York. The muscular im¬ 
pressions f f are distinctly visible. 
1 c, d. Similar views of a large shell, slightly varying in its proportions. 
1 e. Left valve of a very gibbous specimen, in which the posterior side is less extended. 
1 /. A specimen less elevated, and approaching the western forms. 
1 g. Cast of a western specimen, showing more distinctly the muscular impressions f f. 
1 h. Cardinal view of the same, showing the crenulations of the hinge, and the same enlarged. 
1 i. A small specimen of the same, with the shell showing faint concentric lines. 
1 k. Cardinal view of a gibbous specimen. 
Fig. 2. 190. 2. Nucula poststriata. * (Pag. 
2 a. Right valve of this species. 2 b. Cardinal view of the same specimen. 
Fig. 3. 191. 1. Tellinomya nasuta. (Pag. 
3 a. Right valve of a specimen on which the shell is preserved. 
3 b. Similar view of a cast, showing the muscular impression a. 3 c. Dorsal view of the same. 
Fig. 4. 192. 2. Tellinomya sanguinolaroidea. (Pag. 
4 a. Right valve, showing the posterior muscular impression a. 4 b. Cardinal view of the same specimen. 
Fig. 5. 193. 3. Tellinomya gibbosa. (Pag. 153.) 
5 a. Right valve of this species. 5 b. Dorsal valve. 
Fig. 6. 194. 4. Tellinomya dubia. (Pag. 153.) 
6 a. Cardinal view of the two valves in connection. 6 b. Left valve of the same, slightly contracted behind. 
6 c. A separate valve, in which the posterior contraction is scarcely perceptible. 
6 d. Left valve of a specimen, in which the posterior side is much contracted. 
6 e,f. Separate valve of an old shell, with a view of the dorsal margin. 
Fig. 7. 
195. 
5. 
Tellinomya anatiniformis. 
(Pag. 154.) 
Fig. 8. 
196. 
1 . 
Cardiomorpha vetusta. 
(Pag. 154.) 
Fig. 9. 
198. 
2. 
Edmondia subtruncata. 
(Pag. 156.) 
Fig. 10. 
209. 
10. 
Modiolopsis? trentonensis. 
(Pag. 161.) 
151. ) 
152. ) 
152.) 
