20 PROCEEDINGS OF THE ACADEMY OF 



6. P. n obile, Lea. 

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



S. P.canaliculatum, Say. 

 Io canaliculata, Say, Morch, Yoldi, Cat. p. 56. 

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

 Melania 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, 1S30. 



9. P. filum, Lea. 

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



11. P. oli vaceu m, Lea. 

 This species should follow No. 21. 



16a. P. trivittatum, Lea.* 

 Synonymy, Part 1st, No. 79. 



17a. P. fastigiatum. Anthony. 

 Synonymy, Part 1st, No. 44. 



28. P. unciale, Haldeman. 



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

 P. bicostatum and rigidum, Anth., ibid. No. 28. 

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

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



29. P. subulare, 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. an nuliferu m, Conrad. 



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

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

 Ceriphasia Ordiana, Lea, ibid. p. 297. 



38. P. elevatum, Say. 



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



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

 Man. i. f. 1961. 



40. P. aratum, Lea. 



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



44. P. fasti giatum, Anthony. 

 Should be No. 17a. 



49. P. pyrene 1 lum, Conrad. 



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



51. P. regulare, Lea. 



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



55. P. labiatum, Lea. 



55a. P. pallidum, Lea.f 



57. P. v e s t i t u m, Conrad. :f 



* Perhaps = Thnrntonii. 



f After a thorough examination of the specimens of labiatum and pallidum, I incline to the be- 

 lief that they are distinct. 

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



[Jan. 



