246 LIVERPOOL BIOLOGICAL SOCIETY. 



from M. flexuosa (Miiller) in having only five joints in the 

 anterior tarsi instead of six, and in the antennal scale 

 being barely tv^ice as long, instead of more than twice as 

 long, as the peduncle of the upper antennae. 

 4. Cuma scorpio'ules, Mont. 



I have referred the specimens taken to this species as 

 the oldest. Nevertheless if Sars is correct in saying that 

 this species is distinguished from C. edwardsl, Goodsir, 

 (among other characters) by the inner branch of the uro- 

 pods consisting of one single joint instead of two joints as 

 in C. edwardsl* then our specimens should be referred 

 to the last-named species. Sars also states that C. 

 edivardsi may be distinguished from C. scorpiokies " by its 

 shorter length and by its dark brown-violet colour."! 

 But all my specimens, except one, are of a sandy colour, 

 and that one, which is almost black, was taken at the same 

 time and place as two or three sandy-coloured individuals, 

 from w^hich it does not differ in structure. Hoek appears 

 to be doubtful whether these two forms are specifically 

 distinct. 1 Goodsir's description § of C. edwardsl and C. 

 audouhui is so full of errors that it is impossible to make 

 much of it. The figure of C. audoumii shows indications 

 of pleopoda, which are not mentioned in the description, 

 and I am inclined to think that one of the above species 

 is the female and the other the immature male of C. 

 scorpiokies. The '' thumb-like process" of the " first pair 

 of legs" (the third maxillipedes) is merely the external 

 extremity of the first joint, and is, of course, not jointed 

 at all. No such jointed process at the extremity of this, 

 as described and figured by Goodsir, exists in the Cumacea, 



* Middlehavet's Cumaceer, p. 21. 



t Oversigt af Norge's Crustaceer, p. 55. 



X Nederlaiidselie Dierkundige Vereen., 1889, Deel 2, p. 2. 



§ Ediiiburgli New Phil. Journal, 1843 ; vol. 34, pp. 123—6. pi. ii. & iv, 



