' MUI M. I : 



v:iriet\ of S. I;i riijtifnni : The ' '-ral 



shape, ill the narrow umbilicus and in the general color, hut, in 

 N. l;t ri,//if/ini the ni:iin sculpture i-> -piral while in >'. /,' 



longitudinal, 



S. ri i.KiiNosiM, Hinds. I'l. I, tigs. 17. 



I'mbilical erenuhit ions reddish-brown ; whorls spindly silicate 

 near the suture, rihhed at the periphery, spindly Milc.-il.e and 

 ribbed above and below the periphery :ind ne:ir the nnil.ili 

 color livid-white with obliquely radiating dusky-brown blotches 

 and interrupted brown bands near the suture, on the ribs about 

 tin 1 periphery and ne:ir the umbilicus. Diani. '2 ine' 



S. maculatum, Reeve, and S. Hanleyi, Sowb. (PI. 5, I 

 r>5, ri;). arc 1 synonyms; the type of the latter is a deformed 

 specimen in which the base is very convex. This species is 

 easily distinguishable by the radiating brown blotches. 



S. CUMINCII, llanley. PI. 5, figs. 57, 58. 



Umbilical crenulations tinged with reddish-brown ; whorls 

 spirally sulcate near the suture, ribbed at the periphery, spirally 

 silicate and ribbed below the periphery and near the umbilicus ; 

 color livid-yellowish with obliquely radiating, interrupted 

 reddish-chestnut blotches and light chestnut bands at the 

 suture, on the ribs about the periphery and near the umbilicus. 



Diam. T5 inches. 



Habitat unknown. 



This species differs from S. fuliginosum in having the blotches 

 of a lighter color and interrupted and in the absence of a distinct 

 rib above the periphery. It is perhaps only a variety. 



S. BAIRDII, Hanley. PI. 4, iig. 49, 50. 



Whorls with radiating growth-lines broken into five series by 

 spiral sulci, periphery ribbed, spirally sulcate and ribbed below 

 the periphery and near the umbilicus, ribs crenulated; color pale- 

 fulvous with remote obscure spots. Diam. 20 mill. 



lluhitat unknown. 

 S. PLACKNTI I.A, Hinds. PI. 4, fig. 51, 52. 



Shell discoid, very depressed; whorls smooth, regularly spi- 

 rally striated, broadly ribbed at the periphery, spirally sulcate 



