103 



79. Sc. DECussATA. (pi. XXXV. f. 140.) Lam, anim s. vert, 

 vi. p. 229. Sc. cancellata, Humphreys. 



T. elongata, imperforata, spiraliter sulcata ; anfractibus 11^ 

 contiguis, antice posticeque angulatis, sutura profunda disti- 

 nctis, ultimo antice carina cincto ; varicibus numerosis, postic^ 

 angulatis, laqueatis, apertura subquadrata, labio interno crasso, 

 antice angulato ; colore albo. 



This elegantly cancellated species is rarely found in a recent 

 state. The specimen figured, is in Mr. Cuming's collection. 

 From the coast of Arabia. 



80. Sc. VARicosA. (pi. XXXV. f. 126, 128, 143.) Lam' 

 anim. s. vert. Sc. fimbriata. Lam. E.M. pi. 451. f. 4. a. b. 



T. elongata, spiraliter obsolete sulcata; anfractibus 12, plus 

 minusve prominentibus, ultimo antice carina cincto ; sutura 

 profunda, laminis extantibus interrupta ; costulis parvis, nume- 

 rosis, undulatim crenulatis ; varicibus paucis, raagnis, extanti- 

 bus, crenulatis, crassis : apertura rotundata, margine crasso, 

 labio interno varicoso ; colore albo. 



The different varieties, if denuded of the small varices, 

 would present a very similar appearance ; but these, in some 

 cases, fill up the suture with their terminal laminae, and so 

 reduce the rotundity of the whorls. The larger, or true varices, 

 occur sparingly at irregular intervals. From Capul, Luzon, 

 Bohol, and Zebu, Philippines, by Mr. Cuming. 



81. Sc. COCHLEA, (pi. XXXV. f., 142.) Sow. Jun. Zool. 

 Proc, 1844. 



T. elongata, spiraliter obsolete sulcata ; anfractibus 8, pro- 

 minentibus postice valide angulatis ; antice carina valida 

 cinctis; costulis parvis, undulatim crenulatis; varicibus magnis, 

 crenulatis, postice angulatis, rarissimis ; apertura rotun a ; 

 margine crasso; labio interno ci'asso, varicoso: colore albo, 

 vel pallidissime fulvo. 



Dififering from Sc. varicosa in having the whorls angular, 

 and the suture very large, so as to present the appearance of 

 a screw. From Loanda, West coast of Africa, by Dr. Tamis. 

 In Mr. Cuming's collection. 



82. Sc AusTBALis. (pi. XXXV. f. 135.) Lam. anim. 

 s. vert. 



T. elongata. crassa, l8evi,imperforata; anfractibus 9, contiguis, 

 vix prominentibus; ultimo antice carina valida cincto; sutura 

 vix excavata: varicibus 10,simplicibus, sub-rectis, crassis, laevi- 

 bus, prominentibus, ad carinam terminantibus : colore albo, 

 vel inter varices obscure purpureo. 



