105 



87- SC. CRASSILABRUM. (pi. XXXV. f. 115, 116.) SoW . 



Jun. 



T. parva, imperforata, elongata, spiraliter minutissime 

 striata ; anfractibus 6 — 7j antice angulo parvo, postice angulo 

 magno, cinctis ; sutura crenulata ; costulis triangulatis nume- 

 rosis ; varicibus rarissimis, vel nullis : apertura sub-ovali, mar- 

 gine crasso, expanso, minute striate ; colore fere albo. 



There is a large angle on the upper, and a smaller one on 

 the lower part of each whorl, which are crossed by undulating 

 ribs. The true varices or external edges of former varices are 

 very scarce, in some specimens altogether wanting. The 

 specimens vary very much in form and appearance, but the 

 aperture is always surrounded by a broad margin. Mr. 

 Cuming has specimens from Ticao, and Cagayan,Isl.Mindoro 

 of the Philippines ; also from Sansonati, in Central America. 



88. Sc. CRENATA. (pi. XXXV. f. 123.) (Turbo crenatus,) 

 Linn. 



T. sub-elongata, imperforata, minutissime granulata ; an- 

 fractibus 8, sub-prominentibus, ad suturam acute angulatis 

 et crenatis, antice undulata carinais [cinct ; varicibus raris- 

 simis vel nullis ; apertura magna triangulari, antice angulata ; 

 colore fere albo, vel pallide fulvo rufescente. 



The whorls have a prominent angle close to the suture, 

 which forms a kind of canal, interrupted by the large crenu- 

 lations surmounting the edge. From Faro in Portugal and from 

 the West Indies. 



89. Sc. DiADEMA. (pi. XXXV. f. 121, 122.) Sow. Sen, 

 T. brevi, obtusa, imperforata, minutissime cancellata ; an- 

 fractibus 7, prominentibus, ad suturam canaliferis, angulatim 

 crenulatis ; antice carina crassa cinctis ; prope apicem rapide 

 crescentibus ; varicibus prope apicem crassis, prominentibus, 

 in ultimo anfractu sub-obsoletis ; apertura ovali ; margine 

 crasso, antice posticeque angulato : colore albo. 



Much shorter and more obtuse than Sc. crenatus, with the 

 whorls more prominent and excavated at the suture, at the 

 fourth whorl the size increases suddenly, but afterwards more 

 gradually. 



Brought by Mr. Cuming from James's Island, Gallapagos. 



90. Sc. FuscA. (pi. XXXV. f. 138.) Sow. Jun. Zool. Proc 

 1844 



T. elongata, imperforata, spiraliter minutissime striata; an- 

 fractibus 12, sub-prominentibus; ultimo, carina lineari antice 



