274 



AMnriPODA NORMALI.V. 



1. Cyrtophium Brasiliense, (Plate XLVI. fig. 6.) 

 Platophium r.rasilicnso, Dami, U. S. Exphr. Exped. p. 838. pi. 65. f. 9. 



" Male. — Body (seen from above) narrow-elliptical. Antennae ciliate 

 below : upper shorter than base of lower ; flagcllum three- to five- 

 articulated : lower pair a little longer than half the body ; flagel- 

 lura thrcc-articulated. First pair of gnathopoda furnished with a 

 small propodos : propodos of second pair short, oblong, nearly 

 straight below, and thickly furnished -sv-ith very fine, long plumose 

 haii-s, longer than the breadth of tlie raeros ; carpus slightly ob- 

 long, not produced below ; propodos much produced below ante- 

 riorly. Pereiopoda subequal ; seta? short, rather few, not longer 

 than diameter of propoda. 



'^Female. — Body more broadly elliptical, and the antenna) a Kttle 

 shorter than in the male ; the upper paii- a little longer than tlie 

 base of the lower. Propodos of second pair of gnathopoda of mo- 

 derate size, broad, and but Httle oblong, arcuate below and hirsute, 

 but not fui'nishcd with long hairs like the male ; carpus not oblong. 



" Length, with the pleon inflexed, about 2 lines ; with it extended, 

 3 lines. 



" Hah. Dredged in the harbour of Rio Janeiro." — Dana. 



2. Cyrtophiiun orientale. (Plate XLVI. fig. 7.) 

 Cyrtophium orientale, Dana, U. S. Explor. Exped. p. 839. 



" Antenna) pediform, ciliate below : inferior pair having a flagcllum 

 consisting of three artieiili, the second and third being very small ; 

 the first long-styliform, longer than the joint of the peduncle next 

 preceding : superior antennoe having a flagellimi consisting of three 

 subequal articuli, which together are as long as the third joint of 

 the peduncle ; cilia below very long. Propodos of second pair of 

 gnathopoda quite stout, subelliptieal, nearly straight below, and 

 hirsute ; dactylos Veiy nearly as long as the propodos. Antei^en- 

 nltimate and penultimate pairs of pleopoda with very long spines 

 at their extremity (one being nearly as long as the branch) ; 

 inner branch lamellar, having its inner margin spinulose; outer 

 branch shorter than inner, and subterete. 



" Length 2 lines. 



" Hab. Singapore, East Indies." — Dana. 



3. Cyrtophium Darwinii. (Plate XLVI. fig. 8.) B.M. 



Cji'tophium Dai'wdnii, Spence Bate, Brit. Assoc. Report, 1855, p. 59 ; 

 Synopsis, S)C., Ann. Nat. Hist. Feb. 1857. 

 WJiite, Hist. Brit. Crust, p. 196. 



Dorsal aspect of the cephalon quadrate. Pereion and pleon having 



