308 AJirnrroDA norm alia. 



3. Cyllopus DansB, n. s. (Plate L. fig. 3.) 



Resembles C. Lucasii, except in the following details: — Superior 

 antenna) Mnth the flagellum terniinating in a minute articulus. 

 Inferior antenua; ha\-ing the flagellum -with one long and two 

 short tenninal articuli. First pair of gnathopoda having the carpub 

 not produced anteriorly beneath, smooth ; propodos unarmed, aa 

 also the dactylos : second pair havang the cai-pus antero-inferiorly 

 produced, minutely serrated upon the inferior margin ; propodos 

 minutely serrated along the inferior margin ; dactylos scarcely 

 serrated. Fii-st and second jiairs of jiereiopoda uniform, ha^•ing the 

 carjii unarmed ; propoda slightly serrated upon the anterior mar- 

 gin towards the distal extremity : fifth pair having the posterior 

 margin of the basos not emarginate. Thi'ee posterior pairs of 

 pleopoda imperfectly serrated. 



Length ^ths of an inch. 



Hab. Near the Powel Islands (3IS. label on bottle). 



This specimen, which I obtained from the same bottle as C. Lucasii, 

 differs chiefly in having a less perfect armatui-e generally ; the ser- 

 rated character being reduced, or sometimes wanting, in different 

 parts of the body. It is named in compliment to the founder of the 

 genus. 



5. TYRO. 



Tyro, Edwards, Hist, des Crust, iii. p. 80. 

 "Resembles Hijpevia generally, but has the cephalon anteriorly 

 truncated. Superior antennae longer than the body and composed 

 of two joints, the peduncular one short, the other styliform, stout, 

 and excessively long. Inferior antennae short, almost rudimentary. 

 Gnathopoda not subchelate. Pereiopoda unequal : third pair 

 longest, very strong, and having the propodos and dactylos fili- 

 form ; fifth pair very small, and so slight that they appear not to 

 be adapted for locomotion. Three posterior pairs of pleoi^oda very 

 narrow, and not presenting at their extremities two distinct rami." 

 — M. -Edwa rcls. 



1. Tyro cornigera. 



Tyro cornigera, Edwards, Hist, des Crust, iii. p. 80. 

 H}^eria cornigera, Edwards, Ann. des Sc. Nat. xx. p. 387. 



" Supero-anterior margin of the cephalon furnished with two little 

 obtuse divergent crests. Superior antennae sparsely cihated uj^on 

 the internal border. Inferior antennae rudimentary in the female, 

 but in the male composed of four joints, of which the last two are 

 the longest. First pair of gnathopoda tolerably robust ; carpus 



