104 



A common species from Swan River in Australia. The 

 keel is thick, and forms the termination of the varices, which 

 are also thick, prominent, and smooth. The whorls are not 

 separated by a deep suture 



83. Sc. CRASSICOSTATA. (pi. XXXV. f. 119.) B.M. M.S. 



Sc. Australi simili, sed varicibus minus prominentibus, et 

 in medio latioribus. 



There is a much larger specimen than we have figured, in 

 the British Museum, with the above name attached. 



84. Sc. granulosa, (pi. xxxv. f. 144.) Turritella gra- 

 nulosa, Guoy et Gaimard, Voyage de l'Astrotabe. 



T. pyramidali, elongata, minutissime granulata, crassa, im- 

 perforate, costulis obsoletis undulata ; anfractibus 9, vix pro- 

 minentibus, antice prope medium carina obsoleta cinctis, ad 

 suturam crenulatis ; sutura indistincta ; apertura subtriangu- 

 lari ; margine incrassato, antice in angulum extenso ; colore 

 pallide fulvo ; apertura alba. 



In general form resembling Sc. Australis, but the varices 

 are nearly obsolete. From Swan River, Australia. 



85. Sc. undulata. (pi. xxxv. f. 136.) Soiv. Jim. 

 Zool. Proc, 1844. 



T. sub-elongata, spiraliter minutissime striata, imperforata, 

 tenui ; anfractibus 11, paululum prominentibus, antice prope 

 medium carina tenui, lineari, cinctis ; varicibus tanuissimis 

 curvi-linearibus, regularibus, distantibus ; apertura antice an- 

 gulata, colore obscure albo. 



The varices are very thin, curvilinear and regular, but much 

 more distinct than in the preceding species. We have only 

 a single specimen from the collection of Metcalfe, Esq. 



86. Sc. bicarinata. (pi. xxxv. f. 113, 114.) Sow. Jun. 

 Zool. Proc, 1844. 



T. sub-cylindrica, elongata, imperforata, minute cancellata; 

 anfractibus 6, latis, ad latera planis, ad suturam crenulatis, 

 ultimo carinisdus in medio cincto ; apertura ovali, margine 

 crasso, minute crenulato ; colore fere albo. 



A very curious little shell, with crenulated suture, and two 

 prominent keels in the centre of the last whorls ; the edge of 

 the aperture is much thickened. Brought by Mr. Cuming, 

 from Dumaguete, Isl. Negroes, found in coarse black sand, 

 "at seven fathoms. 



