NO. 1876. ON THE CRUSTACEAN ORDER CUMACEA—CALMAN. 621 



number of adult females from one gathering, absolutel}^ indistinguish- 

 able by any other character, it was present in some and absent in 

 others. A similar tooth in a slightly different position is found in the 

 specimens of E. monodon described below. 



Localities.— {]. S. F. C. stations 133-134 (1878); Massachusetts 

 Bay; 26-33 fathoms; U.S.N.M. 44113; 1 female. 



U. S. F. C. station 154 (1878); Massachusetts Bay; 38 fathoms; 

 bottom temperature, 41° F.; U.S.N.M. 34852; 1 female. 



U. S. F. C. station 160 (1878); Massachusetts Bay; 54 fathoms; 

 bottom temperature, 39° F.; U.S.N.M. 44114; 1 female. 



U. S. F. C. station 337; off Plymouth; 16 fathoms; bottom 

 temperature, 47° F.; U.S.N.M. 34875; 1 female. 



U. S. F. C. station 992; off Marthas Vineyard; 36 fathoms; 

 bottom temperature, 48° F.; U.S.N.M. 34300; 2 females. 



U. S. F. C. station 1231; Vineyard Sound; 16 fathoms; bottom 

 temperature, 62° F.; U.S.N.M. 12697, 12698; many, female and 

 young. 



U. S. F. C. station 811; off Block Island; 19^ fathoms; bottom 

 temperature, 60° F.; U.S.N.M. 44112; 1 female. 



U. S. F. C. station 1240; Block Island Sound; 18 J fathoms; 

 U.S.N.M. 12699, 12700; many females. 



EUDORELLA HISPIDA G. O. Sars. 



Eudorella hispidaG. 0. Sars, Oefvers. Kgl. Vet. Akad. Forh., 1871, p. 80; Kgl. 

 Svenska Vet. Akad. Handl., vol. 9, No. 13, 1871, p. 49, pi. 18, figs. 95-97.— 

 S. I. Smith, Rep. U. S. Comm. Fisheries, pt. 1, 1874, p. 555; Trans. Conn. 

 Acad., vol. 5, 1879, p. 115. 



This species is by no means always so easily distinguished from 

 the preceding as might be gathered from Sars' description and 

 figures, and I have had a good deal of hesitation in deciding as 

 to the position of individual specimens. All those determined as 

 E. hisjndu possess the following characters: (1) The antero-lateral 

 tooth of the carapace is strong and more or less horizontal; (2) the 

 carpus of the second leg is a good deal longer (at least 1^) than the 

 merus; (3) the exopod of the uropods reaches at least to the middle 

 of the second segment of the endopod. In each of these characters, 

 however, there is some variation, while among the specimens referred 

 to E. truncatula (1) the antero-lateral tooth may be much stronger 

 than in any of Sars' figures; (2) the carpus of the second leg may be 

 a little longer than the merus, and (3) the exopod of the uropods, in 

 European specimens at least, may be longer than the fu'st segment 

 of the endopod. At all events there can be no question that the 

 outline of the anterior margin of the carapace does not possess the 

 constancy attributed to it by Sars. 



None of the specimens referred to E. Mspida possess a dorsal tooth 

 on the carapace. 



