16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



The body of the specimen is marked with patches of black over a 

 lio-ht surface. The abdomen is dark, as well as the head, and there is 

 a broad stripe of the darker color on the imier nropod. 



The two sexes are similar in every respect. 



This species differs from SpJicvroina scahricuJa Heller" in the absence 

 of granules on the seg-nients of the thorax, the absence also of the 

 two carinated ridges on the terminal segment of the abdomen, and 

 the difference in the shape of the uropoda, the inner branch in Sphpe- 

 rohui scahriciila being broad and obtuse at the apex, and the outer 

 branch narrow, lanceolate, and longer, while in the present species the 

 iimer one is long and narrow, the outer one being broad, but pointed 

 posteriorly. 



This species also differs from Cymodoce c<>rdiforaminali)< Chilton,^ 

 from New Zealand, in the difference in the arrangement of the tuber- 

 cles of the abdomen, in the narrower inner branch of the uropoda, and 

 in the absence of the spine in the foramen. 



A luunber of specimens, some imperfect, both males and females, 

 are from Cape Town, Africa. 



The types are in the U. S. National Museum, Cat. No. 32248. 



Genus DYN AMEN ISCUS Richardson.'- 



Seventh segment of thorax not produced l)ackward in any processes. 



Abdomen composed of two segments, the first of which has indica- 

 tions of parth' coalesced segments and is not produced backward in 

 any process. Terminal abdominal segment with a median notch, 

 which has no median lobe or tooth. 



Both branches of the fourth pleopoda are similar, with transverse 

 folds, fleshy, and without plumose marginal setaj. 



Exopod of the fourth pleopod unjointed. 



Exopod of the third pleopod unjointed. 



Endopod of second pleopod without st3det in male. Branches of 

 uropods strongly unlike; inner branch short, rudimentary; outer 

 branch, long and curved. 



The type of the genus is CiUcsea carinatn Richardson. 



DYNAMENISCUS CARINATUS Richardson. 



Cilicxd carinatn Richardson, Am. Naturalist, XXX1\', l!i()0, ]>. 224; Proc. 

 U. S. Nat. Mus., XXIII, 1901, pp. 535-536, figs. 17-19; lUill. U. S. Nat. 

 Mus., No. 54, 1905, pp. 319-320, figs. 350-352. 



Dynameniscas carinatus Rich.\rdson, Bull. U. S. Nat. ]\Ius., No. 54, 1905, 

 pp. X, xi. 



aReise der Osterr-Fregatte Novara um die Erde, Zool., Part 2, 1865, 3 Abth., 

 p. 141, pi. XII, fig. II. 



''Trans. New Zealand Institute, XV, 1882-83, pp. 188-190. 

 ^Bull. U. S. Nat. Mus., No. 54, 1905, pp. x, xi. 



