studies on marine Ostracods '45 



hairs. The exopodite is also represented only by a bristle, which is in most cases not 

 quite so long as the epipodial bristle. Endopodite: First joint: This has antero-distally 

 a very short and almost bare bristle, which is often even shorter than in the adjoining figure. 

 It has posteriorly three bristles, which have short, fine hairs, almost bare, and are somewhat 

 different in length, being about as long as or somewhat shorter than this joint. Second joint: 

 Of the three bristles situated antero-distally one is about one and a half times or twice as long 

 as the anterior side of the third joint, one is about as long as the anterior side of the third joint 

 and the third is very short. The longest of these three bristles is furnished with short, rather 

 weak spines, the two others have short, fine hairs, almost bare. On the posterior side of this 

 joint there is only one bristle, which has short, fine hairs and is about the same length as the 

 end joint. End joint: Of the seven distal bristles on this joint the third (counting from the 

 front) is very powerful, somewhat longer than the anterior side of the first and second endo- 

 podite joints and furnished with moderately powerful secondary spines. The most anterior one 

 is of the same type as the former one, but is only about half as long. The other five bristles are 

 moderately strong or rather weak, with short, fine hairs or almost bare; the second (counting from 

 the front) and one of the four posterior ones are slightly shorter than the most anterior one; the 

 three others are only about half as long as the latter bristle. Pilosity : Except for the groups of 

 hairs posteriorly on the endite the basale seems to be quite bare; the first and second endo- 

 podite joints are bare. 



Maxilla: — Protopodite: The endite on the procoxale has seven bristles. 

 Of these the antero-inner one and the two postero-outer ones are of the tube-bristle type. The 

 former is moderately long, rather powerful and has two transverse wreaths of long, stiff secondary 

 bristles. The two others, one of which is attached somewhat proximally of the other bristles, are 

 rather considerably shorter and weaker and have short, fine hairs or are almost bare. The four 

 remaining bristles on this endite are rather powerful, pointed, finely pectinated or almost bare, 

 and are of moderate and somewhat difi'erent lengths (the proportions are often the same as in the 

 adj oining figure 24). The endite on the coxale (fig. 25) is armed with thirteen bristles, seven of which 

 are situated on the posterior and six on the anterior process. Of the seven former ones the 

 postero-inner one is moderately long and strong, pointed, moderately strongly pectinated and 

 is situated somewhat proximally of the others. The one situated next to this is somewhat 

 shorter, but very powerful and pointed; it is weakly pectinated or almost bare. Two bristles 

 are of the tube-bristle type, rather short and moderately strong, bare or almost bare. The 

 three remaining ones are all of the same type, pointed and moderately strongly or rather 

 weakly pectinated; the most anterior one is moderately long, but rather powerful, the two 

 others decrease in most cases rather much in length and strength the more posteriorly they 

 are situated. Of the six bristles on the anterior process on this endite the antero-outer one 

 is of about the same t}^e as the postero-inner bristle of the posterior process, but is somewhat 

 shorter and weaker; three are of about the same type and size as the next posterior bristle 

 on the posterior process, the two remaining ones are tube-bristles and of about the same type 

 and size as the tube-bristles on the posterior process of this endite. The basale (fig. 26) has 

 a single short-haired or almost bare tube-bristle, the point of which almost reaches the distal 



ZooloR. bidtag, Uppsala. Suppl.-Bd. I. 94 



