272 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



others ; a granulated ridge runs backwards from the 

 lateral lobes. 



Inner antenna longitudinal; outer rather long and hairy 

 with the 2 last joints of the peduncle projecting beyond 

 the margin of the carapace, sub-equal in length, the 

 penultimate cordate. 



Eye-stalks short with a bifid calcareous appendage on 

 the upper and inner side. 



Abdomen 6-jointed, reaching to the base of the outer 

 maxillipedes, very hairy. 



Chelipedes robust ; carpus and propodos with longi- 

 tudinal lines of tubercles which increase in size towards 

 the upper margin, the largest being at the base of the 

 moveable finger; merus joint smooth, as long as the 

 carpus. 



Ambulatory legs hairy, the propodos shorter than the 

 carpus, dactylus small. 



Differs from T. oregonensis (Dana) in the flatter, more 

 sharply defined areolae, in the distal expansion of the teeth 

 of the antero-lateral margin, and in the different form of 

 the calcareous ocular appendage. 



Colour of areolae bright red ; chelipedes and legs flesh 

 colour, fingers black. One male. 



I have great hesitation in referring Prof. Herdman's 

 single specimen to Sp. Bate's species, as his imperfect 

 description would apply quite as well to T. oregonensis; 

 in short I only do so because he calls it a " pretty species," 

 which applies much more to this specimen than to the 

 dull coloured T. oregonensis. 



The genus Tricliocarcinus was founded by Miers in place 

 of the pre-occupied genus TricJiocera, De Haan, in Proc. 

 Zool. Soc, 1879, p. 34, when he called attention to its 



