114 BULLETIN "129^ UNITED STATES NATIONAL MUSEUM 



COLLODES ROBUSTUS Smith 



Plate 29 



CoUodes depressus Smith, Proc. U. S. Nat. Mus., vol. 3, 1880 (1881), p. 414; 

 not C. depressus A. Milne Edwards, 1878, nor Smith, 1883 or 1886. 



CoUodes robustus Smith, Proc. U. S. Nat. Mus., vol. 6, 1883, p. 5 (type-locali- 

 ties, 21 stations between off Marthas Vineyard and off Chesapeake Bay, 56 

 to 156 fathoms; cotypes in U.S.N.M. and Y.U.M.; largest cotypes, station 

 940, Cat. No. 18763, U.S.N.M.); Rept. U. S. Fish Commr. for 1882 (1884), 

 p. 347, pi. 1, figs. 1, la, 2-26; for 1885 (1886), p. 621 [17]. 



Diagnosis. — Carapace granulate, without median spines. Rostrum 

 two-spined. Palms of clielipeds dilated. 



Description. — Larger than C. trispinosus, carapace longer and he- 

 patic regions more protuberant. The median spines of trispinosus 



FlO.36.— C0LL0DE3 ROBUSTUS, MALE, STATION 940, Fl3H HAWK, DORSAL VIEW, X 1.5. (AFTER SmITH) 



are replaced by small tubercles which, in full grown specimens, are 

 scarcely larger than the granules of the rest of the surface. Granules 

 less abundant on the gastric region than elsewhere. Rostrum wider 

 than in trispinosus, with two short horns more widely separated at the 

 tips. Postorbital tooth triangulate, broader than in trispinosus, 

 slightly exceeding the eyes in adults. Sternum of male coarsely 

 granulate. Margins of basal antennal article dentate. Interanten- 

 nular spine long and slender. 



Chelipeds much as in trispinosus; in addition to the enlarged teeth 

 on the fingers in trispinosus, there is in rohustus a tooth on the dactylus 

 opposite the one on the immo.vable finger. Ambulatory legs long- 

 hairy. 



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