Sliiilii'S on nun-iiii; Oslracnds 



im 



C. symmetrica. E n d o p o d i t e: First joint: The processus inaiuiuilliuis Jias no distal papilla. 

 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 G. W. MCLLEr. The h-, i- and j-bristles 

 are subequal and about as long as or somewhat shorter than the first joint of the exopoditc; 

 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. CXIiW — Conr/inrcia /irlhia-'i ('•. \\ . MbLLKK. — I. Slu'U scrii lidiii liiliiw. J: id x. . 2. Slii'll scni Iroiii llii' s'uU; 

 ?; 42 X. '■'. Slii'll sirii I'nirii Im'Uiw, $; ll'i X. ■'». Postero-dorsiil pari ol' llio shell seen I'rom insidi", ?; 'lOO X. •'). A 

 pari of the selvage inside Uio poslenor margin of the shell, ?; 8:):! X. ti. A pari of Ihe e-bristlo of llie first antenna. 

 ^■. 1200 X. 7. Dislal i)arl of the roil-shaped organ seen from below, ^; 1.S7 X. (Knim speeimens frmn 



station 5H b.) 



Mandible: — This limb agrees almost entirely with th(> same limb in (J. symmetrica. 

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

 the four bristles on the posterior side of the first 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 have short hairs. The 

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

 p o d i t e joint. 



