PLATE 103 A. 
Page 
Fig. 1-6. Rhynchonella speciosa. 444 
1 a. Dorsal view of a specimen of medium size. 
1 b. Profile of the same, showing some parasitic bodies attached at the front and side. 
2 a. Dorsal view of a larger individual. 
2 6 & c. Profile and front views of the same. 
2 d. Cardinal view, showing the deep sinuosities in the dorsal valve and the auricular exten¬ 
sions of the ventral valve. 
3. A partial cast of a large individual of this species. 
4 a. The ventral valve, showing the muscular impression : the teeth are broken off. 
4 b. A fragment of a dorsal valve, showing the muscular impression, teeth, etc. 
4 c. Cardinal view of the preceding specimen. 
5. The rostral portion of a specimen, showing the junction of the valves, the median septum 
in the dorsal valve, and the crural processes of the ventral valve. 
6 a. The interior of the dorsal valve, showing the median septum, the crural processes, the 
thickened cardinal process with the prominent bilobed summit, and the dental fossets. 
G b. Cardinal view of the preceding specimen, showing the sinuosities on each side of the beak, 
the cardinal and crural processes. 
i 
