studies on marine Ostracods 



659 



on the e-bristle. None of these three bristles is widened distally or has a pad-like appendage. 

 All the joints are quite bare. 



Second antenna: — Protopodite: Length 0,3 — 0,4 mm. E x o p o d i t e : 

 The proportion between the length of this branch and that of the protopodite is about 10 : 13. 

 The proportion between the length of the first joint and the total length of the eight 

 following joints is about 10 : 4. The proportion between the length of the longest nata- 

 tory bristles and that of this branch is about 14 : 10. As far as I could observe the 

 first joint is quite bare. Endopodite: This is of about the type described and repro- 



Fig. CXXIV. — Conchoecia isocheira G. W. MiXLF.n. — 1. Shell seen from the side, ?; 87 X. 2. Shell seen froin 

 below, ?: 50 X. -i- and 4. Equipment of the e-bristlo on the first antenna, cJ; 1200 X. 5. Penis seen from outside; 

 387 X. fi. Distal part of the rod-shaped organ and the first antenna. ?; 567 X. (All these figures are drawn from 



specimens from station 44 b.) 



duced by G. W. Mi'LLER; the length of the f- and g-bristles bears a proportion of about 

 2 : 3 to the length of the protopodite. The a- and b-bristles have short hairs, the other 

 bristles are bare. 



Mandible: — Protopodite: Coxale: The toothed edge of the pars incisiva 

 is of about the same type as in C. rotundata, but its teeth, apart from the large anterior one, 

 are somewhat smaller relatively; this part may be described as evenly and finely serrulated; 

 the number of the teeth is somewhat larger than in the species mentioned, about 14 — 18 were 

 observed. The distal tooth-list is of about the same type as in C. rotundata. The proximal 

 tooth-list is also of about the same type as in this species, but the number of its teeth seems 



