702 T. R. R. STEBBING. 



of the pleon are short and smooth ; the following three have each three conspicuous tubercles, 

 of which the middle one is the largest. In a lateral view the large median tubercle of the 

 fifth segment has the appearance of a great boss overhanging the telsonic segment. The 

 latter, though like C. sulcata furrowed down the centre between two tuberculate carinae, differs 

 by the greater parallelism of these keels which in the other species bend towards one another 

 at each extremity. Here the telson has eight spines at the apex instead of six ; its con- 

 vergent sides are ridged, but not notched near the base. The setae are plumose. 



The eyes are dark, of moderate size. The first antennae have the peduncle clearly 

 three-jointed, especially on the under side; in the short six-jointed flagellum the first joint is 

 considerably the longe.st. The second antennae have a peduncle as long as the first antennae, 

 its first three joints subequally short, the fifth a little longer than the fourth ; the thirteen- 

 jointed flagellum rather longer than the peduncle. 



The frontal lamina has its apex rounded, the sides converging slightly to the short wide 

 epistome. The upper lip has the lower margin slightly concave. The spines of the mandibular 

 palp are short, finely denticulate. The inner plate of the first maxillae carries three short 

 hirsute setae. The plates on the second joint of the maxillipeds are held together by two 

 pairs of hooked spines ; the fourth joint is short, the seventh narrow. 



The first gnathopods have five stumpy spines on the hind border of the fourth joint ; 

 the fifth scarcely asserts its existence except by a blunt projection of its hind margin; the 

 sixth has two blunt spines; the finger is tolerably stout with a well pronounced nail. 



In the following limbs the fifth joint successively gains in prominence, till in the fifth 

 peraeopods it is subequal to the fourth or sixth. In the hind liinbs the fourth and fifth 

 joints cari-y some long spines which are finely serrate. 



In the second pleopods the male appendage is rather longer than the ramus to which 

 it is attached. The rami of the uropods are fringed with spines and plumose setae, the setae 

 at the apical notched angles being the longest. The inner ramus is very broad, reaching 

 beyond the outer one and the telson. 



The specimen was 5 mm. long, with a breadth of about 2 mm. 



Locality. The single specimen, a male, was taken at Hulule, along with some of Dana's 

 C. latistylis. 



The specific name is chosen to call attention to the relationship between this and the 

 species with which it has been compared. 



3. C'irolana latistylis, Dana. 



Cirolana latistylis, 18.53, Dana, U.S. Expl. Exp., Vol. xiii. p. 772, PL 51, fig. 6 a— c; 1884, 

 Miers, Report Zoul. H.M.S. Alert, pp. 303, 304 ; 1890, Hansen, Vid. Selsk. Skr., Ser. 6, Vol. v. 

 Part 3, p. 356; 1897, Whitelegge, Mem. Australian Museum, Vol. in. Pt. 2, p. 149; 1900, 

 Borradaile, Proc. Zool. Soc. London, p. 797. 



' Body smooth, naked, but slightly interrupted at base of abdomen. Head transverse, 

 anteriorly rounded, not longer than next segment. Abdomen six-jointed ; first segment nearly 

 concealed under the thorax ; caudal segment subtriangular, a little oblong, broadly rounded 

 at extremity and crenulate, and ornate with spinules and shortish hairs. Caudal appendages 

 not reaching beyond line of abdomen, inner lamella broadly subovate, having crenulations, spinules, 

 and hairs like the caudal segment; the hairs not half as long as the lamella; outer lamella 



