CONUS. 15 



Yar. NIVIFER, Brod. PL 3, figs. 48, 49. 



The revolving lines of color are more distinct, with less of 

 the white maculation. 



Yar. CROTCHII, Reeve. PL 3, fig. 50. 



Shell smooth, striated at base and on the spire ; white, very 

 closely encircled throughout with fine thread-like burnt-brown 

 lines, sometimes interrupted with a few snow-white spots, spire 

 with the edge of the last whorl spotted with brown. 



Saldana Bay, So. Africa; W. Africa. 



Reeve describes this as a species, distinguishing it from G. 

 venulatus by the striate spire ; but the spire is distinctly striate 

 in a large proportion of the specimens (some are smooth) of C. 

 venulatus before me. 



C. GENUANUS, Hwass. PL 3, fig. 51. 



Shell pink-brown or violaceous brown, with revolving narrow 

 lines of alternate white and chocolate quadrangular spots and 

 dashes, these lines being usually alternately larger and smaller. 

 The surface is usually smooth, but sometimes the lines are 

 slightly elevated; spire smooth. Length, 1*5-2 inches. 



Senegal, Guinea, Moluccas. 



C. PROMETHEUS, Hwass. PL 3, fig. 52. 



Shell narrow, rather thin, spire sulcate; white, variegated 

 with numerous lines of short dashes and spots of light chestnut. 



Length, 3-9 inches. 



E. Africa, Madagascar, Senegal (Mus. Acad. Nat. Sciences). 



This is the largest of the Cones, and is of very light build, 

 considering its size. A magnificent series is before me, including 

 the individual measuring nine inches in length, and which were 

 brought to Philadelphia by a vessel trading to the Gaboon region. 

 The smaller specimens approach too closely to C. papilionaceus. 



C. FERGUSONI, Sowb. PL 4, fig. 52 a. 



White, under a brown epidermis, lightly striulate transversely ; 

 shell heavy, with slightly channeled spire. Length, 5*75 inches. 



Panama (Ferguson)- 



This species, which I have not seen, appears very like a faded 

 specimen of the last. The locality rests upon the original 



