264 [February, 



Anod. denigrata, Lea^ 1852, x. 285, 25, 45. 



excurvata, Dekay, Zool. of New York, 202, 17, 233. 



fragilis. Lam. An. sans Vert. vi. 85. 



ferruginea, Lea, viii. 225, 19, 43. 



Ferussaciana, v. 45, 6, 15. 



Footiana, Lea, viii. 226, 20, 44. 



gibbosa. Say, Long's Ex. to St. Peter's, 1824, ii. 265. Lea, Synopsis, 50. 



gigantea. Lea. vi. 1, 1, 1. 



glauca, Yalen. Lea, Synapsis, 50. 



Delassert, Recueil de Coquilles, pi. 13, fig. 3. 



grandis. Say, Dissem. 1829, 341. 

 Lea, Synopsis, 51. 

 corpulenta, Cooper, MSS. 



Harpenthis, Lea, viii. 224, 19, 42. 



imbecilis. Say, Dissem. 1829. 

 incerta, Lea^ 1834, v. 46, 6, 16. 



implicata, Say, Dissem. 350. 



(ro?J^, Invert, of Mass. 118, 78. 

 A. Newtonensis, Lea, vi. 79. 21, 66. 



impura. Say, Dissem. 1829. Lea, Synopsis, 53. 

 Linneana, Lea, x. 289, 27, 51. 

 lugubris. Say, Disseminator, 1829, 340. 

 Marryattana, Lea, viii. 226, 20, 45. 



marginata, {b) Say, Nicholson's Encyclop. iv. pi. 3. fig. 1. 

 Nuttalliana, Lea, vi. 77, 20, 62. 

 * oblita. Lea, 1852, x. 290, 28, 52. 

 opaca. Lea, 1852, x. 285, 25, 46. 

 Oregonensis, Lea, vi. 80, 21, 67. 

 ovata. Lea, vi. 2, 2, 2. 

 pavonia. Lea, vi. 78, 21, 45. 

 Pepiniana, Lea, vi. 96, 16, 51. 

 plicata, Hald, Journ. Acad. Nat. Sc. viii. 202. 

 salmonia, Lea, vi. 45, 14, 41. 

 Stewartiana, Lea, v. 47, 6, 17. 

 suborbiculata, Say, Amer. Conch, pi. 11. 

 subcylindracea. Lea, vi. 106, 24, 117. 

 subvexa, Con., Sillim. Journ. xxv. 341, 1, 12. 

 teres. Con. New Fresh Water Shells, 47, 7, 2. 

 virens, Lea, x. pi. 28. fig. 53. 

 "Wahlamatensis, Lea, vi. 68, 20, 64. 



NOTES. 



(a.) XJnio asper. Ferussac considered this species and Say's apiculatus the 

 same; but there is a strongly marked difference in the arrangement of the 

 tubercles and in the form of the shells posteriorly. (Guerin's Mag. 1835.) 



(5.) U. cariosns. In my Monograph I followed Ferussac in referring U. 

 luteola. Lam!, to this species, but his description does not apply. It very well 

 describes U. stliquoidens, Barnes, in an early stage of growth. 



