studies on marino Ostracods 293 



between the posterior and the other bristles. The two or three posterior ones either have long, 

 soft hairs extending right to the point or else they have short hairs distally, the other 

 bristles are all usually furnished with short, coarse secondary bristles, but sometimes, 

 however, a few of them may be observed with a wreath of long, stiff secondary bristles 

 at the middle. Pilosity: The inside of the limb is sparsely furnished with short, fine 

 hairs; along the ventral margin of the second exopodite joint there is laterally a series of 

 short, but rather stiff, hairs. 



S e V e n t li limb: — This is rather long, but "not, however, quite so long as the shell 

 (on specimens with shells 6,6 — 6,7 mm. long this appendage was about 5 mm.). Cleaning bristles: 

 These are arranged in about the same way as in G. W. MCller's fig. 13, pi. XXXIII, 1906 a. 

 There are from 14 to 16 ventral bristles and from 12 to 16 dorsal bristles situated very close 

 together distally; proximally of these there are from four to seven ventral bristles and from 

 five to seven dorsal bristles scattered irregularly. The distal one of the ventero-distal bristles 

 is in most cases moderately long; the next distal one is very long (the proportion between these 

 two is about the same as is shown in G. W. MtlLLER's figure referred to above) and considerably 

 coarser than the others, most frequently the rest decrease fairly regularly in length the more 

 proximally they are situated, the proximal ones being rather short; a few bristles may, however, 

 form exceptions to this rule. The dorso-distal bristles also show a certain tendency to these 

 proportions, the longest one being, however, rather considerably shorter than the longest ventral 

 one. The scattered bristles are most frequently subequal and of moderate length. The longest 

 ventero-distal bristle is usually quite without bells distally — only on one out of several 

 specimens investigated was one bell observed on this bristle on the limb of one side — but is 

 only furnished distally with a moderately strong double pectination. The other cleaning bristles 

 are usually furnished with one or two — exceptionally three or four — bells cut off transversally 

 or else more or less obliquely distally (figs. 27 and 28). The tongue of the distal bell is cut off 

 very obliquely and is furnished with a moderately strong double pectination such as is described 

 for the longest ventero-distal bristle; the teeth of the combs seem, however, in most cases to be 

 somewhat more numerous and finer than on the last-mentioned bristle. Proximally of the bell most 

 of the bristles are furnished with a dense covering of short fine hairs; the hairs, as far as I have 

 been able to verify, are not arranged in wreaths. The end comb (fig. 26, o = ?) consists of 

 from four to six subequal distal teeth, rather pointed distally and, in addition, of from three to 

 seven proximal teeth on each side of the former. Between the end comb and the dorso-distal 

 cleaning bristle this limb is furnished with an unpaired and moderately strong chitinous process; 

 this is furnished distally with a conical and rather powerful central tooth, bare or almost bare, 

 and on each side of this a somewhat lamcUiform process, armed distally with from about four 

 to six serrate teeth. Between this chitinous process and the end comb there is, in addition, 

 a chitinous process which is distally rounded, peg-shaped and bare. Both these processes vary 

 somewhat in size and also in shape. 



F u r c a (fig. 24): — This agrees very well with the description given by G. ^\'. MCllkr. 

 The number of claws is in most cases nine; sometimes, however, there are only eight. With 

 regard to their shape it is to be noted that they are often more regularly curved than in 



