CHASTER AND HEATHCOTE : MOLLUSCA OF OBAN. 30 1 



C. serpuloides, Mont, [A.M.N.]. A few dead examples 

 dredged. 



^* C. miilepunctatum, Friele. Three dead specimens 

 dredged off Lismore Island. It is to be hoped that a 

 careful search will be made for this species, of which live 

 examples are to be desired in order both to permit it to 

 take rank indisputably amongst the British MoUusca, and 

 to give an opportunity of examining the operculum and 

 radula, and, if possible, the living animal. We give a short 

 description of one of our specimens, in the hope that it 

 may be of use to others in their search for this the latest 

 addition to our molluscan fauna. 



Shell, a much depressed cone, very thin and trans- 

 parent ; sculpture consisting of closely set spiral rows of 

 extremely minute round or oval punctures, which cover 

 every part of the shell ; colour, white in dead specimens, 

 fresh ones being perfectly hyaline ; spire, somewhat raised^ 

 blunt ; apex rounded with the nucleus slightly and obliquely 

 twisted ; whorls 2|, rapidly enlarging, compressed on the 

 sides, the last angulated below the periphery, this angula- 

 tion bounding the broad sloping umbilical area ; suture 

 deep; mouth squarish; peristome \\\vi\ ; umbilicus very large, 

 disclosing all the internal spire. Height '6 mm., breadth 

 •8 mm. 



This has occurred off the west coast of the Isle of Man, 

 45 fathoms, and Mr. J. T. Marshall found an example in 

 drift from Southport shore. Friele's specimens, very much 

 larger than ours, were obtained at one station off the west 

 coast of Norway, This comprises all that is at present 

 known of its distribution. 



One specimen has the characteristic sculpture obscured 

 by strong close-set lines of growth. The large umbilicus, 

 occupying almost the whole of the under surface, bounded 

 by a distinct keel, affords an easy means of recognition. 



