32 



posed for this group by Hill, 1752, and adopted by Browne, 1756, 

 while the latter was used for it by Klein, 1753. As it is not the 

 generally approved practice, however, to go behind Linnzeus, the 

 rule of priority will probably require us to write it Sinum sco- 

 pulosum, since Bolten's name Sinum (1798) has priority over 

 Sigaretus, Lamarck (1799). 



635 =: Sycotypus ocoyanus, Conkad, Pacif. R. R. Rept. V, 329. 



637 = Pyrula modesta, Conrad, Am. Jour. Sci. V, (2) 1848, 433, 12. 



657 = Oliva ancillariasfoimis, H. C. Lea, Trans. Phila. Soc. IX (N. S.), 

 274, 37. 105. 



743:=Fusus oregonensis, Conrad, ib. fig. 13. 



749 = Colus arctatus, Conrad, Pacif. R. R. Rept. V, 322. 



755 = Pusus migrans, Conrad, Proceed. Acad. N. Sci. I, 309. 



771 = Nautilus angustatus, Conrad, U. S. Expl. Exp. X, 728. Mr. 

 Woodward places this (Brit. Ass. Rept. 1856, 567) with doubt 

 as synonymous with the well known Nautilus zizac of Sowerby ; 

 and so far as can be determined from imperfect specimens, I 

 am much inclined to agree with him. The name Aturia, or 

 Aganides, however, will have to be used for the genus. 



