HOPLOPTERON, STYLIIER. 289 



by a chestnut lino, margin of aperture also chestnut-colored, at 

 irregular intervals the whorls are somewhat obliquely crossed 

 by chestnut lines. Length, 7*5 mill. 



Cape Halteras, North Carolina. 



N. TRiLiNEATA, Morch (unfigured). Guinea. 



N. OBTUSA, Anton (unfigured). Hah. unknoiun. 



Section Yolusi/\, A. Ad., 1861. 



N. IMBRICATA Sowb. PI. 71, fig. 31. 



Whitish, longitudinally striated and lineated witli red ; whorls 

 concave above the periphery — which is subangular. 

 Length, 19 mill. 



St. Elena, W. Coast of Central America, 



Genus HOPLOPTEROX, Fischer, 1876. 

 H. Terquemi, Fischer. PI. 71, figs. 33-35. 



Minute, thin, white, translucent, shining ; whorls 7, the first 

 four smooth, minutely flexuously striated, the otheis developing 

 a long wing on either side. Length, 1"15 mill. 



China Sea. 

 A section of this singular shell shows it to be similar to 

 Eulima as to its interior. The figflres represent different stages 

 of growth. 



Genus STYLIFER, Brod., 1832. 



S. Stfmpsoxit, Vcrrill. PI. 71, fig. 37. 



White, swollen, spire short, rapidl}^ enlarging ; whorls 4-5, the 

 last very large, smooth, a slightly impressed revolving line just 

 below the suture. Length, 3*75 mill. 

 George''^ Bank, Block Island, off Coast of New Jersey, on Echini. 



S. Tlrto.vi, Brod. PI. 71, figs. 32, 36. 



Subglobose, spire small, acuminated, produced ; whorls angular 

 above, the last ver}^ large ; outer lip very sinuous. 

 Length. 4-5 mill. 



Northern Europe to Canary Is., on Echini. 

 This spec.-ics is found near the anal opening of its host, and 

 Dr. Jeffreys was therefore of opinion that it derived its nourish- 

 19 



