TUN 1C AT A. 107 



Cerithium (Bittium) terebelloides, sp. nov. (Martens' 1 



MSS.) Conical, turreted, yellowish on the upper three whorls ; body 

 whorl with four smooth spiral keels of nearly equal size, the interstices 

 between them with faint perpendicular strise ; at the base of the body 

 whorl there is a blunt angle, and beneath it a fifth keel. Aperture 

 deeply notched at the base, without any protruding canal. The 

 specimens, which are imperfect at the top, have a length of '33 inches, 

 and a breadth of - 1. They show ten whorls. (Martens.) 



This is the same as my Ceritliium cinctum, and I gladly give the 

 precedence to Dr. von Martens' name. 



