166 POTAMIDES. 



Described by A. Adams as Cerithium clathratum, and cHanged by 

 Bayle to C. sinon, on account of C. clathratum, Desh., a fossil species 

 of the Paris basin ; the original name can stand under the present 

 classification. 



Subgenus Lampania, Gray. 



L. AusTRALis, Quoy. PI. 84, figs. 99, 100. 



Rather distantly longitudinally plicate, forming a nodulous slight 

 shoulder on the Avhorls, with spiral beaded riblets and intermediate 

 thread-like strise ; chocolate and glaucous, often white banded at 

 the suture ; interior whitish, with chocolate sulcations. 



Length, 1"6 in. 



Australia. 



L. UNDULATUM, Sowb. PI. 34, fig. 2. 



Whorls with rounded, nodulous shoulder, and beaded spiral 

 riblets ; light yellowish brown, black-spotted between the shoulder- 

 nodules. Length, 22 mill. 



This name being preoccupied in Cerithium for a fossil species, 

 Bayle changed it to C. rivale. 



L. suBviRiDE, Sowb. PI. 85, fig. 18. 



Whorls rather flat, a little tuberculate at the suture, spirally 

 sulcate ; yellowish brown, with an interrupted band of chocolate at 

 the suture. Length, 22 mill, 



Ifab, unknown. 



This and the preceding will probably prove identical. 



L. DiEMENENSE, Quoy. PI. 84, fig. 1. 



Yellowish olive color, chocolate colored beneath the epidermis, 

 with strong longitudinal plications, and spiral striae, Avhorls without 

 shoulder. Length, 18 mili. 



Tasmania. 



L. Cuming II, Crosse. PI. 84, fig. 7. 



Short, rather inflated on the lower part of the whorls, spirally 

 sulcated, varicose ; yellowish, with a broad chocolate band. 



Length, 1 in. 



Japan. 



L. Steenstrupi, Troschel, is a synonym. 



Var. CONCOLOR, Schrenck. 



Entirely chocolate color, or obscurely tessellated. 



