xlit. CONCHYLIA— D/THFi?^. 



5. undulata, striis longitudinaUbus undulatis. 



with longitudinal undulate strae. 



6. aculeata, striis longitudinaUbus aculeatis. 



with longitudinal prickly striae. 



7. punctata, supra punctis elevatis, infra concavis. 



with raised dots above, and concave ones beneath. 



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



oval, transversely wrinkled, with the beak 

 recurved. 



9. striolata, ovata, longitudinalitir suhstriata: umbone recurvo. 



oval, striate longitudinally, with the beak recurved 



10. fornicata, valvd superiori sub umbonem fornicatd. 



the upper valve vaulted under the beak. 



11. tubularis, valvis inferioris foramine cylindrico-tubulari. 



the perforation of the under valve cylindrical 

 and tubular. 



51. Terebratula. 



1. Cranium, striis minutis decussatis. 



with minute decussate striae. 



2. Psittacea, striis longitudinaUbus. 



with longitudinal striae. 



52. DisciNA. 

 1. ostreoides, Discina. 



