PLATE 102. 
Page 
Fig. 1 & 2. Rhynchonella oblata. 489 
1. A young individual, retaining a part of the shell on the dorsal valve. 
2 a. Front view, showing the broad shallow sinus. 
2 b. The ventral side of another specimen, showing the muscular area and the ramifying 
vascular impressions. ( The latter are represented in lines too sharply defined : the two 
sides are not connected by a sharp line, as shown in the figure; and their extension to¬ 
wards the front of the shell is in shallow depressions, which gradually become obsolete.) 
2 c & d. Dorsal and cardinal views of the same specimen. 
Fig. 3. Rhynciionella multistriata. 
3. View of the dorsal valve. 
440 
Fig. 3 a, b , c ; 4 a , b , c . Rhynchonella pleioplettra. 440 
3 a. A ventral view of a cast. The area of the muscular impression is not sufficiently defined. 
3 b. Dorsal view of the same specimen, showing a greater convexity of the valve, and a 
shorter medio-longitudinal septum than the It. oblata. 
3 c. Front view of the same. 
4 a. A larger individual. The specimen is somewhat broken and distorted. 
4 b & c. Dorsal and profile views of the same. 
