Crustacea.] 



SUBANTARCTIC ISLANDS OF NEW ZEALAND. 



665 



Scyphoniscus magnus, sp. nov. 



Specific Diagnosis. — Body in the female broadly oval, about half as broad as 

 long ; in the male much narrower, hardly more than a third as broad as long. Sur- 

 face of cephalon and peraeon somewhat rugose, being covered with small roughened 

 tubercles. Cephalon (fig. 18a) with the lateral lobes large, broadly rounded, front 

 produced in the middle line into a shallow rounded lobe ; eyes well developed, lateral, 

 containing about nine or ten ocelli. Margins of first segment of peraeon produced 

 into rounded lobes reaching nearly to the eyes, posterior margin of first four seg- 

 ments straight and with the posterior angles rectangular, those of the next three 



Fig. 18. — Scyphoniscus magnus, sp. nov. 



18a. Head and antenna. 



186. First ma.xilla (highly magnified^ 



18c. Seventh leg of male. 



\^d. First pleopod of male. 



18e. Second pleopod of male. 

 18/. Third pleopod of male. 

 ISgf. Telson and uropoda. 



segments with posterior angles more and more acutely produced. Pleon with the 

 first two segments short, the third to the fifth with moderate lateral expansions, 

 last segment short, about twice as broad as long, subacutely produced posteriorly. 

 Antennae with the last joint of peduncle nearly as long as the two preceding; 

 flagellum as long as the penultimate, and consisting of four fairly well marked sub- 

 equal joints, the last ending in a small tuft of fine setae ; the peduncle with margins 

 of all the joints fairly smooth and bearing only a number of short fine setae. Legs 

 (fig. 18c) short, the last pair only slightly longer than the first, and not specially 

 modified in the male. The uropoda (fig. 18^) rather shorter than pleon ; peduncle 

 stout, produced inwards into a small lobe bearing the inner ramus ; inner ramus 



