POT AMIDES. 163 



C. RISSOIDEA, Sowb. PL 33, fig. 73. 



With curved, longitudinal, oblique ribs, which are noduliferous 

 beneath ; whorls convex, base spirally ribbed ; brown, the ribs 

 whitish; Length, 19 mill. 



Port Natal, So. Africa. 



C. MORCHI, A. Ad. PI. 33, fig. 68. 



Rather thin, glaucous, more or less spirally lined with red ; lon- 

 gitudinally rather faintly ribbed, closely spirally ridged ; apex 

 decollated. Length, 1 in. 



Philippines. 



C. TURRITELLA, Quoy. PI. 34, figs. 93, 94. 



Chestnut colored or lighter, often with a white band, granulated 

 in three or four spiral rows by decussating sculpture, lower part of 

 body whorl with revolving riblets only. Length, 1 in. 



Australia. 



Almost exactly like C. cornea, Blainv., of the Mediterranean Sea, 

 as to form and sculpture ; the base is longer and more' rounded, and 

 it has not the iufrasutural white band of that species. 



C, BICARINATA, Gray. PI. 35, figs. 15, 16. 



Obscurely, distantly, longitudinally, narrowly plicate, spirally 

 striate, base defined by a double ridge ; chocolate color, white at 

 the suture, interior brownish. Length, 1 in. 



New Zealand. 



C. lutulentum, Kiener, is a synonym. 



Var. SUBCARINATA, Sowb. Fig. 16. 



Base with three ridges. 



C. Australis, Gray (not Lam.), and C. nigra, Hombr. et Jacq., 

 are considered synonyms by Hutton. 



C. SCALARIFORMIS, Say. PL 33, figs. 78, 75, 76. 



Whorls slopingly convex, the well impressed suture usually 

 defined by a narrow thread, with numerous, close longitudinal 

 riblets, and less distinct spiral sculpture, base of body whorl with 

 spiral riblets only ; whitish, glaucous; light fawn color to chocolate, 

 the lighter colored specimens often with chocolate, the darker ones 

 with whitish lines ; aperture like the exterior. Length, 1 in. 



Florida. 



C. tennis, Pfr. (fig. 76), is very probably a young shell of this 

 species. 



