STEBBING— LSOPODA 107 



CUiccBopsis. The median prolongations in front and rear which distinguish Ceratocephalus* 

 are wanting here, and in Cassidiiiclla the outer ramus of the uropods is very short, whereas 

 here it is very long. 



i^3. ParacilicoBa Jmnseni, n. sp. (Plate 9 c.) 



The single specimen, a male, has the sides of the peraeon setose, and the hind borders 

 of its segments raised, the granular ornamentation of these ridges with a sub-median pair 

 of denticles becoming successively more distinct. The very setose pleon is strongly 

 depressed below the very convex peraeon, giving it in perspective an appearance differing 

 from that which it has when detached. Near the base of the telsonic segment are a pair 

 of widely separated teeth. Below these are a pair of large obliquely truncated processes, 

 which while the specimen is somewhat bent hide from view the short inner rami of the 

 uropods. The latter in fact extend a little beyond the three level points afforded by the 

 apices of the segment, the strong, slightly cur-ved, outer rami being in almost their whole 

 length clear of these apices. 



The eyes are dark, wide apart, not very large. 



The first antennas have the usual stout basal joint which appears to be composite, 

 followed by a joint not longer than broad, presumably the third. In the fourteen-jointed 

 flagellum the first joint is much the longest, the last two are very small, the ten joints 

 preceding the last are furnished with filaments. In the second antenna? the fifth joint 

 is a little longer than the fourth, the flagellum sixteen-jointed. 



The mouth-organs agree very closely with those of Cymodoce pilosa and Cymodoce 

 bicarinata. 



In the first gnathopods the fourth, fifth, and sixth joints are margined respectively 

 with five, four, and four spines. The elongate third joint of the fifth perasopods is without 

 spines, but carries some minute spinules, on its front margin. There the three following 

 joints have several slender spines, in pairs on the fourth and fifth joints, but in single file 

 on the sixth. 



The inner ramus of the first pleopods has a breadth at the base compared with the 

 length in the proportion 6 : 8. Apically it is almost acute. In the second pleopods the 

 masculine appendix is somewhat fusiform in the proximal half, the distal half narrow, 

 reaching some way beyond the supporting plate, to the base of which it is attached. At 

 the end it abruptly narrows to a slender terminal setulose on both margins. 



Length of specimen about 5 mm., or including the uropods 6 5 mm., with a breadth 

 of about 3 - 5 mm. 



Locality. Zanzibar, obtained by Mr Crossland in 1901. 



The specific name is designed to call attention to Dr H. J. Hansen's important treatise 

 on the Sphaeromidae, referred to in the generic definition given above. 



* Ceratocephalus grayanua, Woodward, was published in the Eacijchprndia Britamdca in 1877. Its 

 synonym Breymocerella tricoruits, llaswell, in 1885. 



11 — 2 



