28 COLPODASPIS. 



is dated 1844, so that the volume was probably issued early in the 

 latter year. Forbes' very brief diagnosis has never been illustrated, 

 and was presented at the August meeting of the British Associa- 

 tion, the Report of which bears date of 1844 on the title page. 

 While the absolute priority of Philippi's name cannot, perhaps, be 

 proven, it is at least probable; and fhe mere fact that his type was 

 well illustrated in a standard work on malacology should give his 

 name the preference. The animal is unknown. Monterosato sur- 

 mises that it may not be an internal shell, on account of the 

 peculiar nature of the outer layer. 



Genus? COLPODASPIS M. Sars, 1870. 



Colpodaspis SARS, Bidrag til Kundskab om Christianiafjordens 

 Fauna, II, p. 74. GARSTANG, P. Z. S. 1894, p. 664 (1895). ' 



" Shell internal or wholly covered by the mantle, bulloid, thin, 

 subglobose-ovate, spire a little projecting, depressed, apex truncate, 

 nucleus simple, not mamillar " (Sars). For characters of softs parts 

 see belpw. 



The genus was founded upon a small mollusk of problematic 

 relationship, which Fischer has suggested may be a young Philine, 

 which disposition of it was followed on preceding pages (2, 17) of 

 this work. Garstang's work upon a specimen recently captured by 

 him shows it to possess features notably different from Philine, and 

 indeed from any Cephalaspidia ; and his paper has, therefore, been 

 incorporated herein. 



C. PUSILLA Sars. PI. 21, figs. 1-5 ; pi. 9, fig. 9. 



Shell rimate, very thin, but rigid, hyaline, becoming whitish when 

 dried, subglobose or ovate, smooth; whorls 3, the last one large; 

 spire very short and obtuse ; aperture large, oval or subpyriform ; 

 lip acute, arched, not impressed, produced and rounded in front ; 

 columella nearly straight, about half as long as the shell. 



Alt. If, diam. 1 mill. 



Drobak, Norway, 70-80 fms. (M. Sars, Aug., 1864); 20 fms. 

 (Sars, June, 1865) ; Horten, 14-20 fms. (G. O. Sars) ; near Ply- 

 mouth, England, 15 fms. (Garstang, Feb., 1894). 



Mr. Garstang's description is as follows : 



This Plymouth individual was one-eighth of an inch (3'125 mm.) 

 in length. In color it was snow-white, speckled with opaque white 

 spots. When the animal^was inverted, a position which it frequently 



