PLATE 103 B. 
Page 
Fig. 1 a - g . Leptockelia flabellites. 44!) 
1 a, b. Ventral and dorsal views of a specimen of this species. 
1 c, d. Dorsal and profile views of a specimen of the ordinary form of this species 
1 e. Interior of a specimen with rounded extremities. 
1 f. Interior of the dorsal valve of this species. 
1 g. The interior of the dorsal valve, showing the cardinal process, crura and crural plate, 
restored from cavities seen in a cast. 
Fig. 2 a - g . Leptoccelia eimbriata. 450 
2 a, b. Dorsal and ventral views of a specimen of ordinary size. 
2 c. Front view of a specimen a little greater than the ordinary size, and which has the 
fimbriated expansion extending below the cardinal angles. 
2 d. The ventral side of the preceding specimen, enlarged two diameters. 
2 d-\- Sc 2 d — . Dorsal and profile views enlarged the same as the preceding. 
2 e. The interior of the ventral valve, showing the cardinal teeth and the muscular impression. 
2e(bis). The interior of the dorsal valve, showing the muscular impression, the cardinal 
process, the oblique lamella, median septum and bases of the crural processes. 
2 /. The same enlarged. 
2 g. The specimen fig. 2 e enlarged, to show more distinctly the teeth and muscular impressions, 
Fig. 3 a , b, c. Leptoc«elia dichotoma. 452 
3 a. Dorsal view of the specimen. 
3 b. Ventral view of the same. 
3 c. Front view, showing the outline, the depression of the dorsal valve, and the incurved 
beak. 
Fig. 4 & 5. Leptaccelia planoconvexa. 
jltrypa planoconvexa : Pal. Ncw-York, Vol. ii, pa. 75, pi. 23, fill. 
4 a. b. Dorsal and ventral views of a specimen of this species. 
5. Interior of the dorsal valve of this species. 
Fig. 6. Pholidops sqttamiformis. 490 
(3 a. Interior of a specimen of the natural size. 
6 b. The same enlarged. 
Fig. 7. Pholidops ovatus. 490 
7 a. Exterior of a specimen of the natural size. 
7 b. The same enlarged. 
Fig. 8 a - d . Pholidops terminal is. 490 
8 a. The exterior of the shell, of the natural size. 
8 b. Two valves in conjunction. It is not determined that these valves are in their natural 
relations, and no articulating processes have been observed. 
8 c. The interior of another specimen. 
8 d. The same enlarged. 
