Sliidii's oil iiiHiiiK; Oslracods 



7;)i 



('. symmetrica. Endopodite: First joint: The processus mammillaris has no distal papiUa. 

 The a- and b-bristles have short hairs or are almost bare. Second joint: The c- and d-bristles 

 are not inconsiderably shorter than this joint and are bare. The e-bristle is rather short. The 

 g-bristle is most frequently somewhat longer, the f-bristle somewhat shorter, than the proto- 

 podite; neither of them is sword-shaped distally and both have a few short hairs. Third 

 joint: The clasping organs are as described by 6. W. MCLLER. The h-, i- and j-bristles 

 are subequal and about as long as or somewhat shorter than the first joint of the e.xopodite; 

 the h-bristle has, at least in some cases, signs of a shaft, the others have no distinct shaft; they 

 are narrow, almost only half as wide as the proximal width of the g-bristle, and are bare. 



Fig. C.\LV. — Conchoecia hellacra O. W. Mullkk. — 1. Sholl sut-ii rmm liulow, cj; '.0 X. 2. Slu'll seoii froiii tin- siilc, 

 $: 'i'i X. 3. Shell seen from below, ?; 34 X. '•. Postero-dorsal part of the shell seeii from inside, ?; 400 X. 5. -V 

 part of the selvage inside the posterior margin of the shell, ?; 833 X. 6. -A. part of the e-brislle of the first antenna. 

 S; 1200 X. 7. Distal part of the rod-shaped organ seen from below, .^x 187 X. (From specimens from 



station 58 b.) 



Mandible: — This limb agrees almost entirely with the same limb in (\ symmelrim. 

 The toothed edge on the pars incisiva has from about ten to thirteen teeth. In most cases all 

 the four bristles on the posterior side of the fii-st endopodite joint have short hairs. 



Maxilla: — The end joint is comparatively long, about the same type as in 



C. borealis. 



Fifth limb: — About the same as in C. symmetrica. ( )f the three antero-ventral 

 bristles on the endopodite both the two shorter ones usually liave short hairs. Tlie 

 endopodite has no spines. There arc one or two ventero-medial bristles on the first e x o- 

 p o d i t e joint. 



