Ilia. G. ex pa us a, Lea.* 



118 . G. plebeins, Anthony. 

 = G.sordida, Lea, No. 186. 



119. G. opaca, Anthony. 



= Pleurocera opaca, Anthony, No. 83. 



123. G. modes ta, Lea.f 



124. G. p a g o d i f o r m i s, Anthony. 

 = G. aeutocarinata, Lea, No. 127. 



125. G. Gerhardtii, Lea.J 



126. G. obi it a, Lea. 



= Pleurocera unciale, Hald., Synonymy, Part 1, No. 28. 



127. G. aeutocarinata, Lea. 



G. pagodiformis, Anthony. G. toruJosa, Anth., No. 124. 

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



129. G. Catawbaea, Haldemau. 



Goniobasis Catawbcea, Hald., Amer. Jour. Conch, vol. 1, No. 1, 

 Feb. 25, 1865. 



132. G. s y m m e t r i c a, Haldeman. 



Ceriphasia symmetrica, Hald. Adams' Genera i. p. 297. 



138. G. congest a, Conrad. 



Melania congesta, Conr., Miiller, Synopsis, p. 43. 



139. G. auriculae formis, Lea. 



Megara auriculaeformis, Lea, Adams' Genera i. p. 306. 



140. G. Nickliniana, Lea. 



Leptoxis Nickliniana, Lea, Adams' Genera i. p. 307. 



143. G. ebenurn, Lea. 

 Nitocris ebena, Lea, Adams' Genera i. p. 308. 

 Melania brunnea, Anth.= G. sordlda, Lea, No. 186. 



148. G. graminea, Haldeman. 



Goniobasis graminea, Hald., American Journ. Conch, i. No. 1. Feb. 25, 1865. 



150. G. V a n u x e m i i, Lea. 



Changed to G. Prestoniana, Proc. Acad., 1864, p. 3, Vanuxemii being 

 preoccupied. 

 = G. simplex, Say, No. 157. 



153. G. abrupt a, Lea. 



Leptoxis abrupta, Lea, Adams' Genera i. p. 307. 



154. G. d e p y g i s, Say. 



Potadoma depygis, Say, Adams' Genera i. p. 298. 



155. G. live seen s, Menke. 



Potadoma Niagarensis, Lea, Adams' Genera i. p. 299. 



157. G. simplex, Say. 



G. subsolida, Lea, No. 186, cxcl. synonyms. 



*Very closely allied to, or perhaps=G ! . Whitei, No. 111. 

 fPerhap3 == Pfewrocra luguhris, Lea. 

 JThis is probably the same as G. semigradata, No. 27. 



Mr. Lea agrees with me in considering this species distinct from iostoma, Anth.; and also in 

 making brunnea a synonym ofsordida, instead of ebenum . 



