82 THE VOYAGE OF H.M.S. CHALLENGER. 



with a gland situated in the interior ot the joint. This tubular process has been observed 

 neither by Kroyer nor by Bohm. Probably it occurs only in the male sex. The fifth 

 joint is as long as the fourth, the sixth a little longer. The first tarsal joint is short, the 

 second comparatively long, armed with a claw and two long auxiliary claws. Joints one 

 to four have only a few hairs, while joints five to eight are covered by numerous, and 

 for the most part, comparatively long and stout hairs. 



Habitat. — This species, according to Kroyer, is found oft' Eio de Janeiro, whereas 

 Bohm describes specimens collected by the German man-of-war, the " Gazelle," in the 

 Straits of Magellan, and on the Patagonian coast, at a depth of 30 to 42 fathoms. One 

 specimen was dredged by the Challenger off" Bahia. Depth, from 7 to 20 fathoms. 



Observations. — Bohm considers this species a Pallene. I think, however, there can 

 be no doubt that it is a true Phoxichilidiiim in the sense of Kroyer. To take the num- 

 ber of joints of the ovigerous legs as a decisive proof in this matter is, I think, not 

 safe. The ovigerous legs of the Pallene [Pallene lappa, Bohm) which Bohm examined, 

 were only seven-jointed, and for that reason alone the specimen cannot be considered 

 as a PlioxichHidiiim. Of much greater value, I think, is the form of the ovigerous leg 

 itself, the form of the last joints, of the spines with which they are furnished, &e., also 

 the whole form of the body, the manner in which the cephalic part of the cephalothoracic 

 segment overhangs the proboscis, &c. 



xAjiother question is, of course, whether it would not be convenient to class as a separate 

 genus those forms of Phoxichilidium which have ten-jointed ovigerous legs, probably 

 always present in both sexes. But before taking this step, the different forms ought to 

 be better known, and for this a close study of full-grown speciaiens of both sexes is neces- 

 sary. The genus Anoplodactylus of E. B. Wilson cannot be accepted, because neither 

 the presence or absence of auxiliary claws, nor the fact of the ovigerous legs being five- 

 or six-jointed, has any real importance. 



Phoxichilidium insigne, n. sp. (PI. XIV. figs. 5-7). 



Diagnosis. — Body slender, with large intervals between the lateral processes. Pro- 

 boscis cylindrical, inserted ventrally far posteriorly between the two ovigerous legs. Man- 

 dibles two-jointed, the first joint bearing the second laterally. Ovigerous legs six-jointed. 

 No auxiliary claws. Legs and mandibles furnished with large conical knobs. 



Description. — 



Lengtli of tlie proboscis, . , , . , , .2 mm. 



Total lengtli of the body, . . . . . . . 6 „ 



Length of the abdomen, . . ... . . . 0-5 „ 



Length of the ovigerous leg, ...... 4'2 ,, 



Length of the leg of the first pair, .. . . . . . 19 „ 



Of this most curious form, unfortunately, only a single specimen — and that much 



