xliv. CONCHYLlA—DITHYliA. 



5. undulata, striis longitudinalihus undulatis. 



with longitudinal undulate strise. 



6. aculeata, striis lougittidinalibiis actdeutis. 



with longitudinal prickly striae. 



7. punctata, suprd punctis elevatis, injrci concavis. 



with raised dots above, and concave ones beneath, 



8. cylindrica, ovata, transversim rugosa, umhone recurvo. 



oval, transversely wrinkled, with the beak 

 recurved. 



9. striolata, ovata, lo?igituditialitkr substriata, umhone recurvo. 



oval, striate longitudinally, with the beak recurved 



10. fornicata, valva superiori sub nmbonem Jornicatc't. 



the upper valve vaulted under the beak. 



11. tubularis, valvce inferioris foramine cylindrico-tubulari. 



the perforation of the under valve cylindrical 

 and tubular. 



51. Terebratula. 



1. Cranium, striis minutis decussatis. 



with minute decussate striiie. 



2. Psittacea, striis longitudinalihus. 



with longitudinal stria^. 



52. Uisc?NA 

 1. ostreoides, Discinn. ■ . 



