1877.] CRUSTACEA, CHIEFLY FROM SOUTH AMERICA. 659 



tremity of the penultimate joint of the peduncle ; the hands narrow 

 oblong-oval, with small spmiform tubercles. The sides of the cara- 

 pace legs, and basal scales of the external autennse clothed with lono- 

 light fulvous hairs. Length of carapace about 1 inch. ° 



nab. British Columbia, Vancouver Island. (Coll. Brit Mus ) 

 A single specimen presented by J. K. Lord, Esq., is' in the 

 national co lection. It is labelled " CManarius linJlltusr but s 

 certainly not the species described under that name by Milne-Edwards 

 Ann Sci. Nat. (ser. .3) v. p. 62 (1848), and figured by Dana, US 



Pagurus? sp. 



With C. cayennensis a specimen was sent that, I think, must be 

 referred to the restricted genus Pagurus, on account of thrshort! 

 thick eye-peduncles; but as the anterior legs are both wanting i 

 cannot be referred with absolute certainty to^Y one of the ge? era 

 of the family Pagund^. I cannot identify it at present with any 

 species known to me, and refrain from giving it I distinct spedfic 

 designation, on account of its mutilated condition The^efe! 

 peduncles are much shorter than the anterior margin of the carapace 

 their basal scales small, ovate-acute, and entire. The basal scale of 

 the external antennae is long, slender, nearly as long as the peduncle 

 of the external antennae, and longer than the eyes. The second and 

 third legs have the antepenultimate and penultimate joints short 

 subequal, shorter than than the tarsi, granulous or even spinose on 

 their upper margin, tarsi long, twisted and channelled. This SDecip<! 

 somewhat resembles Eupagurus obesocarpus, Dana (U.S. Expl 



^fenna^ '^'' """"^ ^""^er acicle of the external 



Hab. Cayenne. 



Macrura. 



Pal^mon, Fabricus. 



The species of this genus are very numerous and are found in all 



parts of the world, inhabiting both salt, brackish, and fresh water 



Iheir determination is a matter of great difficulty, on account of the 



changes which the animal undergoes as it increases in age. The 



Mus^i^%q''m7^'hf "'"''.'"T"'^ ^"^ °°^ "^f ''■^''^^^ by Wl"'e (I-ist Crust. Brit. 

 Mus. p. 69, 18-17 be ougs to this genus, and is founded upon a single snecimen 

 of unknown locality m tlie British-Museum ooUection. This spedmen 'eneinUv 

 resembles C. carnescens, but is of a uniform light-yellow ^cXuTCiffl 

 &°' '^^' ""'""^^ *° "'""^^ "' '^' extremity ^f the tarsi. Length near^ 

 Pagnrmpihsimanns White {I. c. p. 60), also founded upon a single specimen 

 of unknown habitat belongs, I think, to this genus, but is in too mutS a 

 condition for detailed description. It is, howevei^Vemarkable fo he Sat 

 length of the eye-peduncles, which are about once and a half the leng h of the 



cSmson vTtf "t "^^ 7''^'^' ^'''' ' '"^^'^ ^^P'"^^"™ ^^-^ '"-'-' -da broad 

 aboutTmch "' ^^' '""■' "°'' ''''"""^ '"^ ^^'' specimen. Length 



