63 



The characters of this little shell are somewhat negative, but 

 on the whole it may be distinguished by its sharp revolving lines 

 having a tendency to granulation, without longitudinal folds ; the 

 little blotches in the region of the rostrum seem to be constant. 

 It is a little like C. lacteum, but much smaller. 



Cerithium ianthinum. Testa parva, tenuis, ovato-lanceolata, 

 violacescens sed labro sutura et varicibus albis : spira acuminata, 

 anfr. trivaricosis ad 10, filis tenuibus ad 8 cinctis, quorum medi- 

 ani majori et granoso ad anfractus apicales: apertura ovato-ro- 

 tundata ; rostro brevissimo ; columella vix callosa. Long, ■§, 

 lat. -£$ poll. Hab. Clermont Tonnere. 



If this be not the young of some other species, which I some- 

 what suspect, it is very well marked by its color alone. The 

 contrasting of the white and violet, and its numerous ribs being 

 beautifully displayed. It is larger than C. egenum. 



Pleurotoma seminifera. Testa subulato-turrita, fuscescens, 

 filis deorsum crescentibus cincta: spira anfr. ad 12, juxta sutu- 

 ram carinatis, deinde excavatis, ad medium nodulis obliquis rubris 

 ornatis : apertura angusta, % long, testse adequans ; cauda brevi ; 

 sinu seque lata ac profunda ; columella rectiuscula ; fauce livido. 



Long. If ; lat. f poll. Hab. . 



Closely allied to P. interrupta, Lk., but differing from figures 

 of it in color, and from the description in having a more deci- 

 dedly excavated girdle in front of the suture, in the greater 

 obliquity of the folds, and in their not reaching to the suture 

 below. 



Mangelia cithara. Testa parva, rhomboideo-fusiformis, cin- 

 erea, costis acutis longitudinalibus 7 instructa, interstitiis conca- 

 vis, subtiliter transversim striatis : spira turrita, anfr. 7 bene dis- 

 cretis, ultimo ovato-triangulari § long, testae adequante : apertura 

 angusta, labro lato, varicoso, postice rectangulari, vix sinuato ; 

 columella concinne rugosa. Long. ■§ ; lat. -£ 6 poll. Hab. Feejee 

 Islands. 



Much like M. Hornbeckii., a West Indian species, but has a 

 much narrower aperture, fewer ribs, and the last whorl shorter. 

 M. pessulata has also many more ribs, and is much less acumi- 

 nated anteriorly. 



