studies on marine Ostracods 



637 



not widened distally of the rows of spines. The b- and d-bristles are also narrow distally, are 

 only furnished with a few short and fine secondary bristles at three-quarters of the way along 

 them and have no pad-like appendages. All the joints are bare. 



Second antenna: — Protopodite: The length in the specimen investigated 

 by nie was 0,7 mm. Exopodite: The proportion between the length of this branch and that 

 of the protopodite was about 10 : 6. The proportion between the first joint and the total length 

 of the eight follow^ing joints was about 10 : 4. The proportion between the length of the longest 

 natatory bristles and that of the exopodite was about 22 — 25 : 15. The first joint is almost bare. 

 Endopodite: First joint: The processus mammillaris is rather low and has no distal papilla. 

 The a- ajid b-bristles have some few short secondary bristles, they are almost bare. Second 



Fig.CXIX. — Conchoecia Chum G.W. Muller. — 1. Posterior part of the shell seen from inside, <^; 400 X. 2. Shel 

 seen from the side, ?; 42 X. 3. Shell seen from below, ?; 34 X. 4. Posterior pari of the shell seen from inside, ?; 

 233 X. 5. Distal part of the rod-shaped organ and the left first antenna, the distal bristles are broken, ?; 260 X. 

 6. The tooth-lists on the right mandible seen from outside, (J; 1200 X. 7. End joint of the maxilla, ?; 457 X- 

 8. Penis seen from outside; 260 X. (Fig. 4 is drawn from a specimen from station 64 b. all the others are from 



specimens from station 58 b.) 



