44 



CRUSTACEA MALACOSTRACA. III. 



the Kattegat, 17 1 2 fath., and in Skager Rak, no fath. (H.J.Hansen); in several places on the west 

 coast of Norway, 60 to 150 fath. (G. O. Sars); in the North Sea (Zirwas); recorded besides from some 

 places at both sides of Scotland (Robertson; T. Scott), off Northumberland, 25 fath. (Norman) and off 

 the west coast of Ireland, 199 fath. (Tattersall); T. Scott recorded it from Cape Flora, Franz-Joseph 

 Land, 30 fath. 



25. Pleurogonium latimanum n. sp. 

 (PI. Ill, figs. 9 a— 9 d.) 



Male. Closely allied to P. inerme. — The antenmilar flagella considerably longer than the 

 sum of the two distal peduncular joints (fig. 9 b); the two distal joints in the flagella longer than in 

 P. inerme. The four anterior pairs of coxae partly with and partly without a vestige of a marginal 

 tubercle. First pair of legs (fig. 9 c) differ considerably from those in P. inerme; fourth joint is much 

 broader than long, the fifth extremely broad; sixth joint has the lower margin in the main jjarallel 

 with the upper, somewhat sinuate and constituting an angle of about 100° with the nearly trans- 

 verse terminal margin: seventh joint with a single process, and together with the claw somewhat 

 shorter than the breadth of sixth joint. — Surface of abdomen not scaly. 



Length of the single apparently adult male ro mm. 



Remarks. P. latimanum is distinguished from P. inerme mainly by the first pair of legs, 

 which distally are broader and especially have the sixth joint quite differently shaped; it may be 

 added that in P. inerme I have not found any variation worth mentioning in the shape of fourth to 

 seventh joint of these legs. I must therefore consider P. latimanum to be a valid species. 



Occurrence. Not taken by the "Ingolf", but by Th. Holm during the cruize of the "Fylla" 

 in 1884, at a single place. 



Davis Strait: Lat. 66°32' N., Long. 55°34' W., 100 fath., stones with Hydroids, 1 spec. 



26. Pleurogonium intermedium n. sp. 

 (PI. Ill, figs, ioa-iod.) 



Description. Intermediate between P. inerme and P. rubicundum. It differs from P. inerme 

 in having conspicuous processes on second to fourth pairs of coxa?; these processes are in the female 

 (fig. 10 a) oblong, conical and acute, much shorter than the differently shaped processes in the female 

 P. rubicundum; in the male (fig. 10 b) these processes are at least sometimes distinctly shorter than in 

 the female and less acute; the processes of first pair of coxa; are in the female obtuse and much 

 smaller than the three following pairs. The coxae of the three posterior pairs of legs are without any 

 vestige of processes, thus about as in P. inerme. — Antennular flagella nearly as in P. inerme. — First 

 pair of legs (fig. 10 c) with fourth joint conspicuously broader than long, thus a good deal thicker than 

 in P. inerme; fifth joint is also a little larger, while sixth joint and seventh joint with claw are in the 

 main as in P. inerme. - - Abdomen (fig. 10 d) more oblong than in the two species mentioned; its 

 surface at most with vestiges of some scales. 



Length of an ovigerous female 1-3 mm., of a male 1 mm. 



Remarks. P. intermedium is certainly a valid species, easily separated from allied forms by 



