24S TAGl'] SICOGSHKRO 



C. (Vargula) norvegica W. Baird. 



? Cypridina lummjica. \\. Baihd, 1860a, p. 20(»; pi. LXXL fi.u;^. 4, 4:1^4(1. 



a. 0. Sars, 1865, p. 104. 

 „ „ „ 1872, pp. 278, 286. 

 „ „ „ 1886. p. 74. 

 (i. S. Brady and A. M. Norman, 1896, p. 647; pi. LIV. %s. 7. S; 



pl. LX, figs. 19—21. 

 G. (). Sars, 1899, p. 234. 



„ „ (). NoiiDGAARD,* 190.5. ]). 182. 



G. W. MiJLLER, 1912, p. If). 



Description: — Female: — 



Shell: — Length, 3,3 -3,65 mm. W. Baird specifies a length of 3,81 mm. (= 1,5 line); 

 G. S. Brady and A. M. NOHau.N give a length of 4 mm. for this species. These authors do not 

 give 'any information about the range of variation of the length. Length : height, about 1,4 : 1; 

 length: breadth, about 1,75 : 1. Seen from the side the form varies somewhat, thought only 

 slightly (figs. 1 and 2).- It is oval with the greatest height at about or just behind the middle 

 and the posterior part only very slightly larger than the anterior one. The dorsal and ventral 

 margins are uniformly and rather boldly arched, the arcuation of the former somewhat stronger 

 than that of the latter; both without corners joining the anterior and posterior margins. The 

 rostrum is well and uniformly arched anteriorly, without any anterior corner; its ventral corner 

 rather pointed. The rostral incisur is deep and narrow. The posterior part of the shell is 

 broadly roimded with only a faint indication of a broadly rounded jsosterior corner somewhat 

 below half the height of the shell or else it is rather strongly truncated (fig. 2). Seen from 

 below (fig. 3) it is oviform with its greatest breadth somewhat behind the middle; the anterior 

 and posterior ends are well roimded, the posterior somewhat broader than the anterior one. 

 The surface of the shell is almost quite smooth with only an exceedingly faint indication of 

 small cavities just within tlie anterior margin of the shell; in most cases this sculpture is scar- 

 cely distinguishable. There are no bristles on the surface. The pores of the surface are very 

 difficult to distinguish. Seen from within (fig. 4) : Medial bristles : On the rostrum there is an 

 irregular row of rather short and most frequently bifurcated bristles directed slantingly forwards 

 and upwards [about the same type as is reproduced for C. (Doloria) levis, fig. 2]; 

 the place on which the ventral bristles of this row are fixed is not developed into a verruciform 

 protuberance. Li fi'ont of and behind this row there are a few scattered bristles. Along the 

 ventral edge of the rostrum there is a great number of scattered bristles; most of these latter 

 are of about the same type as the bristles in the row. Sometimes all the bristles on the 

 rostrum are scattered without any arrangement in a distinct row; they also vary considerably 

 in number. The two bristles near the inner edge of the rostral incisur are of about the 

 same size as the bristles on the rostrum; they are bare or furnished with short, fine hairs 



» O. O. Saiis ilrlcriii. 



