74 



6. P. nobile, Lea. 

 Io nobilis, Lea, Adams' Genera i. p. 299. 



8. P. canaliculatum, Say. 



Io canaliculate/, Say, Morch, Yoldi, Cat. p. 5.6. 



Ceriphasia canaliculata, Say, Adams' Genera i. p. 297. 



Mdania conica, Say, Sowerby, Mollusca, Fauna Boreali Aineiicana, iii. p. 



316, 1836. 



Gyrotoma conica, Say, Adams' Genera i. p. 305. 

 Melania Sayi, Deshayes, Encyc. Meth. Vers. ii. p. 427, 1830. 



9. P. filum, Lea. 



Elimiajilum, Lea, Adams' Genera i. p. 300. 



11. P. oli vaceum, Lea. 

 This species should follow No. 21. 



16a. P. tri vittatum, Lea.* 

 Synonymy, Part 1st, No. 79. 



17a. P. fasti gia turn, Anthony. 

 Synonymy, Part 1st, No. 44. 



28. P. uncial e, Haldeman. 



P. unciale, Hald , Synonymy, Part 1st, No. 67. 

 P. bicostatum &u& riyidum, Anth., ibid. No. 28. 

 P. sugillatum, Reeve, ibid. No. 68. 

 G. oblita, Lea, Synonymy, Part 2, No. 126. 



29. P. s u b u 1 a r e, Lea. 



Ceriphasia subularis, Lea, Adams' Genera i. p. 297. 



29a. P. intensum, Anthony. 

 Melania intensa, Anthony, Reeve, Monog. sp. 371. Brot, List, p. 30. 



33. P. annuliferum, Conrad. 



Melania annulifera, Conr., Miiller, Synopsis, p. 44. 

 Ceriphasia annulifera, Conr., Adams' Genera i. p. 297. 

 Ceriphasia Ordiana, Lea, ibid. p. 297. 



38. P. elevatum, Say. 



Elimia clevata, Lea, Adams' Genera i. p. 300. 



Ceriphasia elonqata, Lea, ibid. p. 297, not Ceriph. elevata, Say, of Chenu, 

 Man. i. f. 1961. 



40. P. ar a turn, Lea. 



Ceriphasia exarata, Lea, Adams' Genera i. p. 297. 



44. P. fasti gia turn, Anthony. 

 Should be No. 17a. 



49. P. pyrenellum, Conrad. 



Melania pyrenella, Conrad, Miiller, Synopsis, p. 45. 



51. P. regulare, Lea. 



Ceriphasia regularis, Lea, Adams' Genera i. p. 297. 



55. P. labiatum, Lea. 

 55a. P. pal lid urn, Lea.f 

 57. P. vestitum, Conrad. J 



* Perhaps = Thorntonii. 



f After a thorough examination of the specimens of laln'alum and pattidttm, I incline to th be- 

 lief that they are distinct. 

 } G. spinalis, Lea, may be identical with this species. 



