147 



Genus Amphoroidea, M. Edw. 

 Amphoroidea angustata, n. sp. 



Plate vi., figs. 1 to 10. 



The body is narrow, smooth, moderately convex, with 

 the epimera not distinctly marked off from their respective 

 segments, and are almost vertical in direction. The head is 

 moderately depressed, and is longer than the first segment 

 of the thorax; there is a slight excavation of the margin 

 on each side of a small rostral process. The eyes are rather 

 small and slightly prominent. The first segment of the 

 thorax is rather shorter than the rest, which are subequal 

 in length. The posterior margins of the fourth, fifth, sixth, 

 and seventh project slightly behind in an increasing degree 

 serially. The anterior portion of the pleon shows the median 

 portion of a first segment ; the second forms the whole of 

 the lateral portions; the others are obscure. The posterior 

 portion is dome-shaped, tapering behind, with an obtuse 

 rounded end, having a very faint insinuation, representing 

 a notch, scarcely visible from above. 



The basal joints of the antennules are expanded into broad 

 sub-lamellar ovate' plates, projecting in front of the head, 

 with their inner margins diverging. The second joints are 

 slightly expanded. The third joints much narrower, and 

 short. The flagellum has 7 joints, the two terminal ones 

 very minute. 



The antennae have their third and fourth peduncular 

 joints rather more expanded than usual. The flagellum has 

 11 joints. 



The epistome is large, quite like that in A. austraiis, 

 Dana. 



The maxillipeds have the joints of the palp with small 

 lobes sparingly setose. 



The legs are in a single series, and — except the first 

 gnathopods — subequal : they are all hairy, and almost devoid 

 of spines. The basal joints are short. 



The first gnathopods are somewhat twisted, the basis 

 and ischium are subequal in length, the merus is strong and 

 much broader than long, the carpus is insignificant, the pro- 

 podus is compressed — being flattened on the inner side — to 

 a narrow posterior edge, which, besides the hairs, has two 

 pectinate spines; the inner surface of the joint also bears 

 short hairs, which are not numerous. The dactylus is strong 

 with a terminal curved claw, and in place of the secondary 

 claw there are three strong teeth close together, followed by 

 a short series of very short teeth inwardly. The dactylus 

 moves at right angles to the plane surface of the propodus. 



