PLATE 33*. 

 Fig. 1. 175. 8. Atkypa cuspidata. (Pag. 138.) 



1 a. Ventral valve of a perfect specimen. 1 b. Front view. 1 c. Dorsal valve. 1 d. Profile view. 

 \ e. Front view of a specimen, where tlie sinus is narrower and more angnlar than in the preceding. 

 1 f. Profile view of the same. 

 1 g. Dorsal valve of a specimen which is more extended laterally. 1 li. Front view of tlie same. 



Fig. 2 a, h. 377. 8. Ambon ychia mytiloides. (Pag. 315.) 



Fig. 3. 379. 3. NucuLA? DONAciFOEMis. (Pag. 316.) 



3 a. Right valve of this species. 3 b. Cardinal view of the same. 



Fig. 4. 380. 6. BucANiA intexta. (Pag. 317.) 



4 a. Dorsal view of the fragment. 4 b. Lateral view. 4 c. A portion of the surface magnified. 

 4 d. A portion of the surface of B. sulcatina magnified. 



Fig. 5. 354. 14. Modiolopsis terminalis. (Pag. 318.) 



3 a. Left valve of the fragment. 5 b. Dorsal view of the same. 



