86 AMrilll'ODA.NUKMALIA. 



2. Callisoma Hopei. (Plate XIV. fig. 6.) 



Callisoma Ilopei, CostUy Cut. Itul. Cnist, brj the Rev. Mr. Ilapc, 1801. 



I only know this species from Mr. Hope's figure and description. 

 It appears to differ from C. cretiata in the following more or less 

 important particulai's : — 



Eyes increasing downwards. Superior antenna? having the peduncle 

 longer than the flagcllum. Inferior antennsc more than half as 

 long as the animal. Dactjlos of the first pair of gnathopoda 

 obtusely spatuliform, and sparsely covered with short reversed 

 hairs. Thi-ec posterior pairs of pereiopoda having the mcros 

 cylindrical in each. Fourth segment of the pleon without a notch. 

 Posterior pair of pleopoda not longer than the preceding. 



Length /(,tl^s of an inch. 



Hab. Naj)les {Rev. Mr. Hope). 



12. ALIBROTUS. 



Alibrotus, Edwards, Hist, des Crust, iii. p. 23. 



Superior antennae not large at the base, long and slender, furnished 

 with a second appendage. Both paii-s of gnathopoda largely deve- 

 loped and subchelate. 



Milne-Edwards founded this genus to receive a species that he 

 had previously referred to Lysianassa, from which it is distinguished 

 by the length and slender form of the superior antennsB, and the 

 greater size of the second pair of gnathopoda. I have seen no 

 species of the genus. 



1. Alibrotus Chauseicus. 



Alibrotus chauseicus, Edwards, Hist, des Crust, t. iii. p. 23. 

 Lysianassa Chauseica, Ann. Set. Nat. t. xx. p. 365. 



Body elongated. Cephalon furnished with a small rostiiim. Eyes 

 small and circular. Superior antennae scarcely passing the pe- 

 duncle of the inferior. 



Length ? 



''Hab. Isles of Chansaj^'. (Milne- Eilwards). 



2. Alibrotus littoralis. (Plate XIV. fig. 7.) 

 Anonyx littoralis, Kroyer, Voy. en Scand. pi. 13. f. 1. 



Superior antenna? one-third as long as the animal ; the flageUum' 

 about four times as long as the peduncle. The inferior antennae 

 longer than the superior, the peduncle not reaching beyond the 



