Studios on marine Oslracods (iOl 



The first joint has spines proximally-dorsally, as in my fig. 12 of C. symmetrica. E n d o p o d i t e: 

 This is of about the type described and reproduced by G. W. MCller; see the accompanying 

 figs. 4 and 5. First joint: The processus mammilUiris is pointed. The a-bristle has short hairs. 

 The b-bristle on both the right and the left endopodite was furnished somewhat proximally 

 of the middle with a group of twelve long hairs; distally of this group there are a moderate 

 number of rather powerful spines. Second joint: The g-bristle is somewhat (about a fifth) 

 longer than the -[jrotopodite, not sword-shaped distally and is furnished with sparse short hairs. 

 The f-bristle is of about the same type as the g-bristle, but about a fifth shorter than this, 

 hare or furnished with short hairs. Third joint: The h-, i- and j-bristles are subequal; the pro- 

 portion between their length and that of the g-bristle is about 2 : 5. The clasping organs have 

 a short hyaline papilla distally and are moderately strongly cross-striated distally. In the 

 proximal part of this branch there were a number of small yellowish-brown corpuscles in the 

 specimen investigated. 



Mandible: — Protopodite: Coxale: The toothed list on the pars incLsiva 

 has about ten or eleven teeth. The distal tooth-list is of about the same Ui^e as has 

 been previously described for C. oblunga. The proximal tooth-list is rather slightly narrower 

 than the distal one; as is the case in most species it is presumably of a somewhat varying tvpe; 

 in the specimen investigated by me it was about the same as in the accompanying fig. 6. The 

 masticatory pad is relatively narrow, only about half as wide as the proximal list, divided into 

 from three to five tran.sverse ridges and furnished with fine papillae situated close together. 

 The part that is surrounded by lancet -bristles and hairs is raised somewhat like a pad and is 

 also furnished with fine papillae situated close together. Between this part and the masticatorv 

 pad there are, as in, for instance, pi. IV, fig. 5, C. ClaI'S, 1891 a, a couple of low, powerfvd spines. 

 Basale: The six teeth on the distal edge of the endite have very fine serrulation. The single 

 tooth on the outside of this joint is of about the same type and size as has been described above 

 for C. elegans. The epipodial appendage is represented by a little verruca with 

 a very short bristle. The endopodite is relatively short and high; see the accompanying 

 fig. 7. The first joint has four short-haired bristles on the posterior side, of about the same 

 relative lengths as in my fig. 22 of C. symmetrica. 



Maxilla: — Endopodite: The distal spines on the first joint are unusually long, 

 about half as long as the height of the end joint. The end joint is of about the same type as in 

 ('. serrulata. 



Fifth limb: — This is of the same type as in my hg. 2" of C. symmetrica, but the 

 endopodite has no spines and the middle end claw of the exopodite is relatively longer. On the 

 first exopodite joint I found two bristles in the medial-ventral group, four or five in the 

 proximo-ventral group and three or four in the disto-ventral group. Pilosity: The proto- 

 podite and the first exopodite joint are partly furnished with rather long hairs. 



Sixth limb: — The dorso-lateral bristle on the first exopodite joint was ab.sent 

 in the specimen investigated by me. 



Seventh limb: — The end joint has spines. 



Penis: — This is of about the type reproduced in my Hg. :V2 of ('. symmetrica. 



