7;{2 \\(\\: sK(»i;si;i:i!(; 



S i x t li 1 i 111 li: - !•] 11 il () |i o (1 i I c: Tins lias (uh' m- l wo linstlcs. u Inch arc soinrt inics 

 furnishod with short liairs. soiiu'tinios with Ituii; diu's. M x d |i o d i l c: I"'iist jdiiit: At alxmt 

 the middle of tho vi'iitral side there are one or two bristles, one ol which is rather loiij; and has 

 hmg hairs and the other usually short and with sluirt hairs. Disto-vciitrally there are two or 

 three bristles, all of which are usually rather short and have short iiairs. The two dorsal bristles 

 on this joint are also short ami have short hairs. Sometimes all the bristles on this joint have 

 short hairs. i 



1' e n i s: — This is of about the same type as in C. symmetrica, but the eopulatory 

 appendage is considerably narrower, about as narrow as in ('. Haddoni. 



F 11 re a: — Behind the claws there is an unpaired bristle, wliicli is about as long as 

 the sixth or the seventh claw. 



Rod-shaped organ: — The shaft reaches to about the distal boundary of the 

 second joint of the first antenna or to the point of this limb. The capitulum (see the appended 

 fig. 7) is about as long as or somewhat shorter than the second joint of the first antenna and is 

 of about the type reproduced by G. W. MUlleh. 



Upper lip: — The part between the combs is of about the same type as in my fig. 4 

 of C. Belgicae. The p a r a g n a t e s are about the same as in C. symmetrica. 



Female: — 



Shell: — Length: According to G. W. MCl.LER 2,35 mm. The specimens investigated 

 by me measured 2,0 — 2,25 mm. Length : height about 2:1; length : breadth about 2,8 : 1. 

 Seen from the side (see the appended fig. 2) it is of about the same type as 

 the male shell, but is somewhat higher posteriorly. Seen from below it has its 

 greatest width at about the middle and the anterior part dominates somewhat less over the 

 posterior part; the side contoiu's are evenly curved; see fig. 3. In other respects it is like 

 that of the male. 



First antenna: — This has rather distinct joints. The bristle on the second 

 joint is about as long as the capitulum on the rod-shaped organ and has short hairs. The e-bristle 

 is not quite twice as long as this limb and has on its anterior side a similar equijjment to that of 

 the male; it is not sword-shaped distally. The a- to the d-bristles are subequal and about a third 

 of the length of the e-bristle. The first and second joints are partly furnished with short, 

 fine spines. 



Second ante n n a : — The p r o t (j p o d i t e is somewhat weaker than in the 

 male; it attains a length of about 0,9 mm. in specimens whose shells are 2,15 mm. long. 

 Exopodite: The proportion between the length of this branch and that of the protopodite 

 is about 17:30. Endopodite: This has two joints. The g-bristle is not quite so 

 long as the protopodite, the f-bristle is about a third or a quarter shorter; otherwise 

 they are like those of the male. The h-, i- and j -bristles are about half as long as the 

 g-bristle or somewhat shorter or longer; they have sparse short hairs. The second 

 joint is bare. 



Rod-shaped organ: — The shaft extends to about the point of the first antenna. 

 The capitidum is of the tx'pe reproduced and described by G. W. MClleh. 



