732 Brady and Norman — Monograph of the Marine and Freshwater Ostrucoda 



Cythere limicola, Norman. 

 Distribution. — Fiords of East Finmark, in 5—30 fathoms (A. M. N.). 



Cythere cluthse, B. C. & R. 



Distribution. — Living in 125—150 fathoms, Varanger Fiord, and 20-30 fathoms, 

 Bog Fiord, East Finmark (A. M. N.)- 



Cythere villosa (G. O. Sars). 

 Distribution. — East Finmark (A. M. N. ). 



Cythere (?) semipvata, T. Scott. 



(PI. Lxiii., figs. 14, 15.) 



1890. Cijthere{^.) semiovata, . . Scott, T., " Addit. Famia, Firth of Forth," 



Eighth Ann. Rep., Fishery Board for Scot- 

 land, p. 321, pi. xii., figs. 1, 2. 



" Shell, seen from the side, semiovate, dorsal and ventral margins nearly 

 parallel ; dorsal margin a flattened curve, sloping downwards posteriorly, and 

 forming with the nearly straight ventral margin a somewhat bluntly angular 

 extremity ; anterior end sharply rounded below, then curving obliquely upwards 

 and backwards till it merges in the dorsal margin. Seen from above, the width 

 is greatest near the anterior end, but varies little for about three quarters of the 

 length, when the sides converge and form posteriorly a somewhat wedge-shaped 

 extremity. The anterior end is broadly rounded, inclining to angular in the 

 middle, where the valves meet ; greatest breadth equal to height ; height about 

 one-third the length. Surface of the valves smooth, but having a slightly resinous 

 appearance. Length, "35 mm. 



" Habitat. — Off St. Monica ; not very rare. Specimens of this form have been 

 dredged on several occasions at tins place. Depth, 12—14 fathoms ; bottom clear 

 gravel and sand. The animal has not yet been made out ; the species is therefore 

 for the present doubtfully referred to Cythere.'''' 



We quote here the original description and give illustrations from one of Mr. 

 Scott's specimens kindly lent to us for that purpose. We, however, think that the 

 description is erroneous in taking the anterior for what is really the posterior 

 extremity of the shell. It is a very minute form ; but we do not recognise it as 

 the young of any species known to us. 



