[ 3!:iv. ] 



Fig.l7. A. DuPETiTHOUARSii, Deshayes. EevueZool;,' 



p. 360, (1839.) No. 15. 



Bianey, 1. c. iii., p. 13, (1857.) 

 W.G.Binney, 1. c, p. 15, t. 76, fig. 9, (1859.) 

 S. Oregonensis, Lea. Trans. Amer. Philos. 

 Soc, vi., p. 100, (1839.) 



{See also pi. e,figs. 18, 19, 20.) 



AEIONTA. 



" 18. A. Eemondi, Tryon. Proc. Acad. Nat. Sci- 

 ences, Philadelphia, p. 281, t. 2, fig. 1, 

 (1863.) • No. 5. 



" 19. A. Veitchii, Newcomb, MS. No. 1. 



" 20. A. Californiensis, Lea. Trans. Amer. Philos. 



Soc, vi., p. 99, t. 23, fig. 79, (1839.) No. 2. 



Binney, L c. ii., p. 121, t. 6, fig. 2, (1851.) 

 IT. vincta, Valenciennes, Voy. Venus Moll., t. 

 1, fig. 2. 



{See also pi. 6, figs. 1 et seq.) 



POLYMITA. 

 " 21. P. LEVIS, Pfeiffer. (See pi. 6, fig. 6.) 



HELICID^. 



Synonymy and Eeference to 

 Plate 6. 



AEIONTA. 



{Plate 5, figs. 18 et seq) 



1. A Kelleti, Forbes. Proc. Zool. Soc, Lon- 



don, p. 55, t. 9, fig. 2, a. 6, (1850.) No. 3. 



W.G. Binney, I.e., p. 17, t.76, fig. 12, (1859.) 



2. A. CBEBRiSTBiATA, Newcomb. Proc. Califor- 



nia Acad. Nat. Sciences, p. 116, (1864.) No. 4. 

 {See also fig. 17.) 



