studies on mariiio Ostracods 225 



from the common original type than C. (D.) pectinata. The great agreement with regard, for 

 instance, to the distal part of the endopodite of the maxilla that the last-mentioned species 

 shows with closely-related forms of other groups, for instance of the sub-genus Vargula, decidedly 

 supports this assumption. 



On the other hand it is to be stated that they are very like each other ; they are certainly 

 very closely related to each other; they may be regarded as representative forms, the one living 

 at South Georgia the other at the Falkland Islands and T i e r r a del 

 F u e g o. 



As the type-species of this sub-genus I regard C. (D.) levis. Type. 



C. (Doloria) levis n. p. 



Description: — Female: — 



Shell: — Length 2,4—2,7 mm.; length : height, about 1,38 — 1,45 : 1; length : breadth, 

 about 1,9 : 1. Seen from the side (fig. 1) it varies, though rather slightly, in form; 

 it is irregularly oval with its greatest height at or somewhat behind the middle and the posterior 

 part of the shell somewhat larger than the anterior part, sometimes rather more than in the 

 adjoining figure. The dorsal margin is rather boldly arched, flattened anteriorly, sometimes 

 even rather more than in the adjoining figure, sometimes rather flattened posteriorly as well, 

 as in the specimen reproduced, sometimes evenly arched; the ventral margin is much more 

 slightly arched than the dorsal one, its arcuation is even and uniform. The posterior part of 

 the shell is broadly rounded, somewhat flattened with a slight indication of a posterior corner 

 somewhat below half the height of the shell. The anterior margin of the rostrum is well rounded 

 with only a weak indication of a corner, its ventral corner is rather pointed. Seen from 

 below it is egg-shaped with its greatest breadth at or somewhat behind the middle and with 

 gently and uniformly rounded sides; its anterior and posterior ends are rather broadly rounded, 

 the former rather narrower than the latter. The surface of the shell is even and 

 shiny, with rather numerous but exceedingly short and fine hairs. The pores of the surface 

 are small. Seen from inside (cf. fig. 1 of C. (D.) pectinala): On the rostrum there is 

 a rather sparse but distinct row of rather long, simple or bifurcate bristles, going slantingl)^ 

 upwards. Some of these bristles, those that are situated most ventrally, are somewhat longer 

 than the others and situated rather closely together; the place on which they are fixed is not 

 developed into a verruciform protuberance. Most of the bristles of this row seem to be quite 

 bare, like the other medial bristles in this species; often, however, some of them at least seem 

 to have along a part of their length short, close and very fine secondary hairs (very difficult 

 to get sight of even with Reichert's ocular 4, Leitz' imraers. Vj,). Apart from this row of bristles 

 there are only a few single scattered bristles on the rostrum. Within the inner edge of the 

 rostral incisur there seems to be, besides the two bristles placed close to each other near the edge, 

 as a rule only a single rather short bristle, placed near the joining line. On the list behind the 



Zoolog. bidnig, Uppsala. Suppl.-Bd. I. *•' 



