studies on marine Ostracods 493 



from which the species lias its name. E n d o p o <1 i t e: Tlie posterior distal bristle of the 

 first joint is somewhat shorter tlian the bristle o! the end joint. 



Sixth 1 i m b (fig. 7): — The back edge is fairly straight, the postero-ventral corner 

 is, however, broadly rounded. It has 19 — 21 posterior and three or four anterior ventral bristles. 

 Two bristles are developed on the anterior edge of the limb. 



Seventh limb: — This is of the same type as in A. Mulleri. The distal teeth in the 

 end combs are most frequently armed with from one to three pairs of very powerful secondary 

 teeth; cf. fig. 8. 



The furca, lateral eyes and median eye are about the same as in 

 A. Mulleri. 



The m a 1 e is unknown. 



Habitat: — Falkland Islands: S. A. E., Station 51, Port William (type- 

 locality); 3. IX. 1902; depth, 22 m. ; sand: 4 mature females and 4 larvae; R. M. S. 165 

 and 166. S. A. E., Station 53, Port William; 3. IX. 1902; depth, 12 m.; sand and gravel: 

 2 larvae; E. M. S. 167. S. A. E., Station 55, Port Albemarle, lat. 52" 11' S., long. 60" 26' W.; 

 8. IX. 1902; depth 40 m. ; sand and algae: one mature female; R. M. S., on slides. 



Type-specimen on slides in the collections of the R. M. S. 



Asterope Ohiini n. sp. 



Description: — Female: — 



Shell: — Length, 2,0 — 2,2 mm.; length : height about 1,4 : 1; length : breadth about 

 1,95 : 1. As is seen from the accompanying figures 1 and 2 it has practically c|uite the same 

 type as the shell of ^. Mw/^m, both when viewed from the side and from beneath. The 

 posterior part of the shell, seen from the side, is sometimes a little less rounded than in the 

 species mentioned and more sharply cut off than in the accompanying figure. Seen from 

 inside: The medial bristles are also almost similar to those in the species mentioned. The 

 row of bristles between the spine-bearing list and the posterior margin of the shell is, however, 

 rather irregular, often even more irregular than in the accompanying figure 3. The spine-bearing 

 list is provided with about 43 — 52 hyaline spines varying somewhat in size. There are usually 

 no bristles at all between the most ventrally situated of these spines; between each of the others 

 there are usually one or two, sometimes even three, short bristles varying somewhat in length. 

 Between the spine-bearing list and the posterior margin of the sliell there arc no broad pores 

 such as are found in A. spinifera. 



First antenna (fig. 4): — This is very like this limb in A. Mulleri. There are, 

 however, some differences to be noted: The third and fourth joints togetlier form an almost 

 quadratic joint, about as long as or rather slightly shorter than the total length of the fifth and 

 sixth joints. The distal boundary of the fourth joint is moderately concave. The longest 

 posterior distal bristle of the fourth joint is shorter than the total length of the fifth and sixth 



