ON CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOUTH SEAS. 653 



first three segments with a smallj inferior, tooth. Hind margin of the anterior 

 segments, especially the first, sinuated on each side, the hinder angles of the first 

 segment acute. The first segment longer and larger than the rest, in the middle 

 sub-bulbose, produced. Legs slender." By the ' small, inferior, tooth ' I understand 

 that to be intended which I have shown in the ventral figure of ^jer. s. 1 ; it is 

 produced backward at the sinuate point of the hind margin on either side. The 

 spinulation of the slender legs is sufficiently shown in the figures gjip. 1 and prp. 5. 



" Side-plates of the third, fourth, and fifth segments of the pleon broad, rect- 

 angular, widening outward. Anal segment a little wider than long, narrowed in the 

 middle, having at the base a longitudinal fluting, the apex convexly truncate; the 

 peduncle of the uropods oblong, much longer than broad, at the apex a little narrowed-^ 

 outer ramus small, inserted far from the apex in the incisure of the inner margin 

 of the peduncle ; inner rami much shorter than the anal segment." The longitudinal 

 stria or fluting may easily be overlooked in consequence of the colour variegation. 



Colour in our specimens forming throughout a dark ground of brown and blackish 

 brown confluent spots, marbled with light markings, which in many parts, especially 

 on the sides, take the form of bright round or rounded dots ; under side and legs 

 pale, as is also the dorsal connecting skin between the segments shown in flexure. 



Length, 10 — 12 mm., breadth, 5 — 6"25 mm. Budde-Lund gives length, 11-5 mm., 

 breadth, 5o mm., height, 2'7 mm. 



Habitat. Lifu, Loyalty Islands. 



Miers (Proc. Zool. Soc. London, for 1877, p. 667), in his account of Gubaris gigas, 

 from Nicaragua, remarks that ' in the prominent anterior margin of the head, beneath 

 which the antennae are partly concealed, it resembles the genus Pyrgoniscus, Kinahan,' 

 and this genus, he adds, 'is nearly allied to Gubaris! In G. gigas the prominent 

 margin of the head is represented without any median fissure. 



CUBARIS LIFUENSIS, n. sp. 



Plate LXX a. 



Body minutely squamose, with microscopic scattered hairs, otherwise smooth. Head 

 short and broad. Anterior margin of prosepistome rather convex, just forming a rim 

 to the front of the head. Finst peraeon segment with front and hind margins 

 strongly sinuous, anterior angles more acute than the posterior, lateral margins thin, in 

 front slightly curving ujjward, a slight fold passing, at a little distance from the outer 

 edge, from the front angle to a rounded ending some way short of the hinder angle. 

 This fold is scarcely to be seen without dissection. The hinder angles of all the 

 segments after the second are subquadrate, the second and third segments have a 

 duplicature ending roundly half-way down, not adjacent to the lateral margin. 



The eyes have ocelli in varying number, 16 — 22. 



In the second antennae the penultimate joint is longer than either of the two 

 preceding joints and slightly longer than the flagellum, which is two-thirds as long 

 as the ultimate, and has a first joint only a little shorter than the second. 



The terminal segment of the pleon has its base shorter but much broader than 



86— 2 



