CUMACEA. 



edge, the numerous serrations of the dorsal crest, and the double tooth-like projection 

 . of the third free somite. 



CAMPYLASPIS VERRUCOSA var. ANTARCTICA. 

 (Figs. 14-16 on Plate, and text-fig. 4.) 



C. verrueosa, G. 0. Sars, Nyt Mag. Naturvid. xv., p. 105 (1868) ; id., Crust. Norway, III., p. 90, pi. Ixiii. 

 (1900) ; Caiman, Cumacea, Fisheries, Ireland, Sci. Invest. 1904, 1. (1905), p. 35 ; id., Mitth. Zool. Stat. 

 Neapel, xvii. (1906), p. 424. 



The Antarctic specimens which I refer to this species differ in the following 

 points from all the northern specimens with which I have compared them : 



The hairs scattered over the surface of the body are much longer and more 

 conspicuous, though not, apparently, more numerous. The sides of the carapace are 



PIG. l.Campylaspis verrueosa, VAR. antarctica, FOURTH AND FIFTH SOMITES OF ABDOMEN, 



FROM ABOVE AND FROM THE SIDE. 



more distinctly flattened or even slightly hollowed, especially over an oblique area, 

 defined above and below by rows of tubercles, and corresponding apparently to the 

 lateral groove of C. sulcata. The dorsal tubercles of the first five abdominal somites 

 are replaced by sharp teeth (Text-fig. 4), pointing backwards, and having the 

 edges more or less distinctly serrated ; and they are accompanied on each somite by 

 a pair of dorso-lateral teeth, which are hardly indicated in the northern specimens. 

 The constriction of the fifth somite (Text-fig. 4) is much more strongly marked, 

 and the posterior margin of the somite is produced, on the dorsal side, into a 

 curved median tooth, serrated on the upper margin, in place of a small tubercle 

 in the northern specimens. The thoracic limbs do not differ perceptibly in the form, 

 relative proportions or armature of the various segments. The uropods (fig. 16) have 

 the peduncle much more strongly serrated, and the teeth on the inner margin are 

 spiniform, curved and irregular in size. The inner edge of the endopod is also more 

 distinctly serrated. The specimens are larger than any others I have seen. Adult 

 females measure 5 35 mm. in length of body. 



2 B 



