CRUSTACEA MALACOSTRACA. III. 



45 



the characters pointed out. Furthermore it is smaller than P. inerme, and is taken only in water near 

 to or below zero and in more considerable depths. 



Occurrence. The "Ingolf" has captured this species at three stations, two among them in 

 the cold area. 



North of Iceland: Stat. 128: Lat. 66°5o' N., Long. 20°02' W., 194 fath., temp. o-6°; 2 spec. 



— - — Stat. 126: Lat. 67°ic/ N., Long. i5°52' W., 293 fath., temp, -h 0-5°; 3 spec. 

 North-West of the Faeroes: Stat. 138: Lat. 63°26' N., Long. -]°^6' W., 471 fath., temp. -^ o-6°; 40 spec. 



27. Pleurogonium rubicundum G. O. Sars. 

 (PI. Ill, figs. 11 a— 11 b.) 

 1864. Pleuracantha rubicunda G. O. Sars, Forh. Vid. Selsk. i Christiania f. 1863, p. 220. 

 ! 1897. Plcurogonium rubicundum G. O. Sars, Account, II, p. 113; PI. 47, fig. 2. 



Sars has published an excellent figure and a good description of the female, but some notes 

 on both sexes must be added. — In the female the processes on the coxae of second to fourth pairs are 

 long, subcylindrical with the end rounded, sometimes (fig. 11 a) even longer than in the animal figured 

 by Sars; the processes on first pair are conspicuously shorter and thicker than on the three following 

 pairs; the coxae of fifth to seventh pairs are adorned with small, distally rounded, conspicuous pro- 

 cesses, generally a little broader than long, and those on seventh coxae are smaller than the two other 

 pairs. In the male the processes on second to fourth pairs of coxae are obtuse, not cylindrical, broader, 

 but scarcely longer than in the male of P. intermedium (comp. fig. 10 b); the processes on fifth and 

 sixth pairs are smaller than in the female, and on seventh pair rudimentary. — As to the antennulae 

 and first pair of legs the figures of Sars are sufficient. — The abdomen is somewhat broad, especially 

 in the male, and its surface, excepting on its most posterior part, has the appearance of being 

 covered with a very large number of small, imbricate scales (fig. 11 b); in reality scales do not exist, 

 but the scaly aspect is due to fine, sharp, impressed lines limiting small areas. 



Remarks. Both sexes are easily distinguished from the preceding forms by the scaly aspect 

 of the abdomen, and by possessing small processes on fifth and sixth pairs of coxae; the females are 

 besides separated by the long, subcylindrical and obtuse processes on second to fourth pairs of coxae. 



Occurrence. Not taken by the "Ingolf. But in 1899 it was captured by Dr. Th. Mortensen 

 at the Faeroes at Klaksvig, 10—15 fath., 3 spec. 



Distribution. It has been recorded from Kiel in the Baltic (Apstein), from off Landskrona 

 and further northwards in the Sound, 12—28 fath. (Bjork), and in south-western Kattegat, 15 fath. (H. J. 

 Hansen). It occurs along the whole coast of Norway from Christiania Fjord to Vadso, 6—30 fath. 

 (G. O. Sars); finally it has been recorded from a few places at both sides of Scotland (Norman, T Scott), 

 in the North Sea off the northern coast of England (Normanl, and at the east and west coasts of Ire- 

 laud, 6 to 37 fath. (Tattersalb. 



