PLATE 40 A. 
1. 245. 5. Bucania pttnctifrons. (Pag. 187.) 
1 a. Dorsal view of a small specimen. 1 b. Lateral view, showing the umbilicus. 
1 c. Dorsal view of a larger specimen, showing the elevated carinal band, which does not rise above the sur¬ 
face on the lower part of the shell. 
1 d. Lateral view of another specimen, showing the side of the shell, which is obtusely angular, with obscure 
longitudinal ridges. 
1 e. A portion of the surface enlarged. 
2. 246. 1 . Cyrtolites compresses. (Pag. 188.) 
2 a. Lateral view of a specimen, having the sinuous lamellae at the ordinary distance asunder. 
2 b. Dorsal view of the same. 
2 c. Lateral view of a specimen, where the elevated lamellae are more distant. 
2 d. Lateral view of another, showing the lamellae closely arranged. 
2 e. A cast, which is smooth, with the exception of the elevated carina. 
2 f. A portion of the surface enlarged, showing the finer transverse and longitudinal striae, and the subnodu- 
lose appearance of the surface. 
3. 247. 2. Cyrtolites trentonensis. (Pag. 189=) 
3 a, b. View of the upper surface of two individuals. 3 c. Lower surface of the same. 3 d. Dorsal view. 
4. 249. 1. Trocholites ammonius. (Pag. 192.) 
4 a. A small perfect specimen, showing the lamellose striae in great perfection. 
4 b. A large specimen, preserving the lamellose surface. 
4 c. Dorsal view, showing the archings of the striae upon the back. 
4 d. A specimen denuded of the shell, showing the septa and deep outer chamber. 
4 e. Section, showing the position of the siphuncle. 
4/, g. Lateral and dorsal view of a fragment of an inner volution, showing a slight undulation of the septa 
on the back. 
4 h. Lateral view of a fragment partially denuded of the shell, showing only the oblique transverse ridges. 
4 i. Dorsal view of the same, showing the arching of the striae upon the back. 
4 k. Section of the same, showing the position of the-siphuncle. 
