1894. 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



53 



COLLODES LErTOCHELi:!"^. now siieci.-s. 



CoUodes rohusius, Smith, of the Athiiitic coast of IS'orth Anieiica, is 

 replac-ed in the Gulf of JVlexieo by a ch)sely allied species. The cara- 

 pace is similar in shape to that of C. rob ustus. Surface tuberculous, with- 

 out spines. Rostrum divided by a V-shaped notch into two acute teeth 

 shorter than in C, rohustus, their outer margin convex. Postorbital 

 tooth broad and Ion g, much exceeding the eyes. The abdomen of the male 

 is broader tlian in C. rohH.sfuSj constricted at the fifth segment; a small 

 spine or tubercle on the first segment, and a long sjnne on the filth 

 directed downward and backward. The appendages of the first seg- 

 ment are more divergent than in C. rob ustus, and more slender at the tips. 

 There is a small spine on the fifth segment in the female. The cheli- 

 peds are weak in both sexes, about as long as the carapace; mauus 

 slender, fingers as long as the palm. Ambulatory legs stouter than in 

 C.robustus, the first and second pairs nearly equal in length, the second 

 often exceeding the first, about twice as long as the carapace; dactylus 

 of last two pairs longer than the propodus. The color in alcohol is a 

 pale ecru, while C\ robystus is yellowish. 



MeasuremenU. — Length of carapace (of male), 16.5 mm; width, 12.7; 

 length of cheliped, 17 ; length of first ambulatory leg, 34.7 ; second, 35; 

 third, 31.5; fourth, 30.7; length of propodus of third ambulatory leg, 

 6.5; dactylus, 7.2; length of propodus of fourth ambulatory leg, 6.7; 

 dactylus, 7.7. Length of carapace (of female), 17.5; width, 13.2; length 

 of cheliped, 17; length of first ambulatory leg, 31.5; second, 35; third, 

 32.5; fourth, 30. 



LocdlUies. 



Fivo stations in the Gulf of Mexico, as follows: 



COLLODES, doul)tfnl species. 



Four small dried specimens frnm theGulf of California are intermedi- 

 ate between C. tenuirostris and C. granosus. They have a rostruni 

 intermdiate in length between the two, not fissured, but minutely 

 bifid at the tip. There are two cylindrical spines on the gastric and 

 cardiac regions, and a smaller more acute spine on the first abdominal 

 segment. There are a few granules on the branchial and hepatic 

 regions. The eyes are large, exceeding the postocular tooth. The 

 carai)ace is proportionally wider at the hepatic regions than in 6'. 

 tenuirostris. 



