MARINE CRUSTACEANS. 701 



which he makes the second. Should that be so, the palp in Calathura will be not three- 

 jointed, but, in accordance with Harger's view, two-jointed. 



The first gnathopods are robust, but so provided with lobes and grooves that the various 

 joints may be compactly folded together. As usual the fourth joint is broad, and the fifth 

 very small, resting on the boss which projects at the base of the palm. The sixth joint 

 is massive, with the convex front margin longer than the hinder one, which differs from 

 what is found in the other species by forming a convex instead of a concave palm. This 

 is bordered with spinules and flanked with setae projecting from the surface on either »ide. 

 The finger is long and curved. 



The second gnathopods were mutilated, wanting the last three joints, but they were 

 evidently in agreement with the first peraeopods, which have the fifth joint very small, 

 triangular, undeniding the narrowly oblong oval sixth joint. The latter is fringed along the 

 hind margin with setae and six spines, which are followed near the junction with the finger 

 by a series of trifurcate spines. The finger has some little stiff hairs along the inner margin 

 and many setules on the convex outer margin. It ends in a spine and a small nail. 



The remaining peraeopods are more slender, and have the fifth joint attached end to 

 end to the neighbouring joints, attaining its greatest length in the fourth pair. The second 

 and third pairs are the shortest. In all the finger is shorter than the sixth joint. 



The pleopods have the inner branch narrowly oblong. The male appendage of the second 

 pair reaches beyond the branches and is slightly widened at the apex. 



The uropods appear nearly to resemble those of C. crenulata, but to be fringed with 

 much longer setae. The upper ramus, however, though elongate, does not reach beyond the 

 basal joint of the lower one. The terminal joint of the latter is only a third as long as 

 the basal. There seems to be a short peduncle distinct from the rami. The specimen in 

 spirit had a few brown spots and stellate markings on a light ground. 



Length of the specimen in strongly curved position 6 mm. ; actual length about 10 mm. 



Locality. A single specimen, male, taken at 2.3 fathoms depth, on hard ground, in 

 Fadifolu Atoll. 



The specific name is chosen out of respect to Mr L. A. Borradaile, the zealous 

 carcinologist, through whom the present collection of isopods was entrusted to me. 



Fam. Cirolanidae. 



For the bibliography of this family reference may be made to Willey's Zoological Results, 

 Part 5, p. 628, 1900, and Sottth African Crustacea, Part 2, p. 49, 1902. 



2. Cirolana sulcaticauda, n. sp. PI. XLIX B. 



This small species belongs to the group in which the angles of the fifth pleon segment 

 are enclosed by those of the fourth, and in which the hind limbs are not adorned with long 

 setae. By the longitudinal medio-dorsal furrow of the telsonic segment its close approximation 

 to G. sulcata, Hansen, is established. In other respects the pleon clearly separates the present 

 from the South African species. 



The first segment of the peraeon is much the longest, the last three are somewhat trans- 

 versely rugose, with a line of tubercles adjacent to the hind margin. The first two segments 



90—2 



