studies oil marine Ostracods 337 



quite half the length of the following joint, the posterior bristle of this joint is still shorter. 

 The bristle of the sixth joint is about as long as the anterior bristle of the fourth joint, the 

 a-bristle of the seventh joint is about twice as long as this. All these "bristles have short hairs 

 or are almost bare; the hairs on the a-bristle of the seventh joint are very coarse, almost 

 spine-like. The sensory bristle of the fifth joint is about as long as the anterior side of the six 

 distal joints. Of its thirteen sensory filaments — all of them without secondary spines — the 

 nine proximal ones are relatively long — about a third of the length of the bristle — and thick 

 in comparison with the distal ones; the three following ones are considerably shorter — about 

 a fifth of the length of the bristle — and narrower, and are attached considerably distally of 

 the former ones; the remaining filament is very short and narrow and is attached near the point 

 of the bristle. Of the distal bristles the c-, f- and g-bristles are subequal and slightly shorter 

 than the anterior side of the seven distal joints, the b-bristle (measured to the point of its longest 

 distal filament) is about a third shorter tlian these three. The b-bristle (see fig. 13) has five 

 filaments. The proximal one of these (fig. 14) has no trace of any verruciform swelling distally 

 of the sucker (such as is found in, for instance, C. (Vargula) norregica, see above, fig. 1.5 of this 

 species). Of the four other filaments on this bristle the three distal ones issue almost at the 

 same point, rather close to the point of the bristle, the fourth is fixed somewhat proximally of 

 the middle of the bristle. Two of the three distal filaments are bare and comparatively short 

 and narrow, the third is long and rather powerful — extending far beyond the point of the 

 bristle — like the one fixed somewhat proximally of the middle of the bristle. Of these long fila- 

 ments the proximal one is furnished distally with from nine to eleven, the distal one with eight 

 or nine, small suctorial organs, proximally of which one or two verruciform spines may be found. 

 The c-bristles has ten filaments altogether. The proximal one of these is of the same type and 

 strength as the corresponding one on the b-bristle. Seven filaments are of the same type as 

 those of the f- and g-bristles (see below) but are bare or with only a few very short, fine secondary 

 spines. Proximally of these seven filaments and between nos. 2 and 3 of them we find two 

 long and rather powerful filaments (of the same type as the two last-mentioned filaments on the 

 b-bristle), the proximal one having distally nine or ten, the distal one eight or nine small suctorial 

 organs, proximally of which one or two short spines are found. The f-bristle has ten and the 

 g-bristle eleven filaments of moderate length; most of these filaments (fig. 12) have two kinds 

 of secondary spines, some, about two or three, strong and scale-shaped, the others short and fine; 

 the distal filaments are either furnished only with secondary spines of the latter kind or else 

 they are quite bare. The simple sensory bristles d and e are subequal and somewhat less than 

 a third of the length of the last-mentioned bristles. Pilosity: The second joint has numerous 

 transverse rows of short, fine hairs on both the anterior and the posterior sides. Apart from 

 these this antenna is bare. 



Second antenna: — Protopodite: Length, about 1,6-1,7 mm. The 

 medial-distal bristle is short, being about as long as the shorter of the proximal bristles of the 

 first endopodite joint; it is bare or almost .so. The exopodite has about the following 

 proportion between the joints: 



1 : 11 : III : IV : \' : \ 1 : \ 11 : \ 111 : IX .il : U : 3 : 3 : -J : ■_' : 2 : 2 : 1. 



Zoolog. bidras, Ui)i)sala. Supijl.-Bd. I. ^•^ 



