98 AMPniPODA NORMALIA, 



distinguishable from those of the flagelhim. Four anterior pairs 

 of coxa) deeper tlian their rospeetivo segments, the three anterior 

 being furnished near the inferior margin Avith four simple hairs. 

 First pair of gnathopoda having the propodos oblong quadrate ; 

 the inferior margin parallel with, and as long as, the superior ; 

 palm slightly convex ; inferior angle produced into a small tooth. 

 Second pair of gnathopoda larger than the first, having the pro- 

 podos broader anteriorly, and the inferior angle produced into a 

 blunt tooth ; palm convex, fringed with short solitaiy hairs. 

 Penultimate pair of pereiopoda longer than the one preceding ; 

 ultimate pair very miich shorter, not longer than the bases is 

 wide. Posterior pair of pleopoda scarcely reaching beyond the 

 preceding. 

 Length g^^^ths of an inch. 



Hah. Dredged in Plymouth Sound (C. S. B.). 



2. Phoxus HolboUi. (Plate XVI. fig. 2.) 



Phoxus HolboUi, Kroyer, Tidskr. vol. iv. p. 150. 



Spimce Bate, Si/tiopsis Brit. AmjjJi., Ami. Nat. Hist. Feb. 1857. ' 

 Wlnte, Hist. Brit. Crust, p. 173. 



Eyes not appreciable. Superior antenna) having the peduncle reach- 

 ing to the anterior margin of the cephalon ; flagellum as long as 

 the peduncle, 7-jointed, each joint longer than broad ; secondary 

 appendage half as long as the primary. Inferior antenna) scarcely 

 louder than the superior ; flagellum easily distinguished from the 

 peduncle ; joints of the flagellum broader than long near the base, 

 and much longer than broad near the extremity. Maxillipeds 

 having a small squamiform plate arising from the ischium and 

 bases. Fii'st pair of gnathopoda haAong the palm of the pro- 

 podos convex, oblique, fringed with solitary hairs ; the inferior 

 angle produced into a sharp tooth. Second pair of gnathopoda 

 scarcely lai'ger than the first, which it resembles, except that the 

 palm is not quite so oblique. Coxa) of both paii'S of gnathopoda 

 and first pair of pereiopoda each furnished with^i'^ simple hairs. 

 Two anterior pairs of pereiopoda having the daetylos short, and 

 the extremity of the propodos furnished with two short spines, 

 each with a subapical cihum. Penultimate pair of pereiopoda 

 one-third longer than the preceding ; ultimate one-half shorter, 

 being scarcely as long as the bases is wide. Posterior pair of 

 pleopoda longer than the two preceding pairs. 



Length \ of an inch. 



Hah. Banff {Mr. Edward). Dredged in Plymouth Sound (C. S. P.). 



