204 EEV. T. E. E. STEBBING ON NEW EXOTIC AMPHIPODA 



spiny. Inside the lobe of the hand is a group of tiny pectinate spines. The finger 

 has small spines on its inner margin and at the base of the nail. 



Second gnathopods : side-plate quadrate, lower hind corner strongly rounded, spines 

 on hind margin and inner surface. First joint scarcely longer than the hand, margins 

 nearly parallel, anterior slightly concave, both spined; second joint, though short, 

 longer than third or fourth, antero-distally lobed on the inner and outer sides ; third 

 joint lobed postero-distally ; fourth or wrist-joint forming a very small triangular cup, 

 much overlapped on both sides by the monstrous hand. The hand broad, long, and 

 thick, the front margin much longer than the hinder. The palm very oblique, with two 

 deep excavations, the process between which meets a strong projection of the finger's 

 inner border. The palm is beset with three or more rows of spines of different sizes, 

 which form a sort of coronet round the process. At the termination of the palm there 

 is a pit or fold in the integument in which the end of the finger lies when closed. 

 The finger is much arched, with the inner protuberance already mentioned, and 

 several rows of microscopic spines on its two surfaces. 



First pereeopods : the side-plate quadrate, much spined on the inner surface ■ the 

 first joint not much differing from the corresponding joint of the gnathopods; the 

 third joint much longer than the fourth or fifth, which are subequal in length, and 

 like the third carry numerous spines. The finger about as long as the hand, with 

 small spines at the base of the distinctly socketed nail. 



Second pereeopods: side-plate with anterior margin nearly straight, protuberantly 

 rounded above, rounded off below, hinder margin irregularly excavate. First joint but 

 little projecting beyond the side-plate ; third joint not much longer than the fifth ; fourth 

 shorter than fifth ; finger with a strong denticular process on the inner margin, carrying 

 a small spine at the base ; the nail socketed among thin lobes and spines as in the first 

 perceopod. Many spines on the various joints. 



Third perreopods: the side-plate long, bilobed, the hinder lobe deeper than the 

 anterior, fringed below with spines. First joint roundly quadrate, hinder rim scarcely 

 indented ; third joint a little produced below posteriorly, subequal in length to the 

 much thinner hand; fourth joint shorter than the hand. All these joints spinose. 

 Finger shorter than the hand, unguiculate. 



Fourth pereeopods : side-plate with a minute anterior lobe and a deep hinder one, 

 strono-ly spined below. The first joint oval, the spines on the hinder rim minute ; the 

 third joint triangular, the sides indented, a distal lobe behind overlapping the next 

 joint; the fourth joint expanding abruptly backwards, with four deep indents on the 

 front margin, the hinder nearly straight, sloping down to a distal margin, which is 

 narrow, but wider than the neck of the joint. Hand long, thin, nearly parallel-sided; 

 finger not nearly so long as the hand ; the nail little more than a third the length of 

 the whole, instead of about half as in the first perseopod. 



Fifth pereeopods : side-plate small, bilobed, the hinder lobe the more important. The 



