Occurrence. Several specimens of this form have been picked up from 

 bottom-samples taken at Korshavn from a depth of about 60 fathoms muddy 

 sand. It also occurs occasionally at Ris0r in about the same depth. 



Distribution. Shetland (Wolfenden), Scotish coast (Scott). 



5. Pseudocyclopia crassicornis, Scott. 



(PI. V, fig. 2). 



Pseudocyclopia crassicornis, T. Scott, Tenth Ann. Report of the Fishery Board for Scotland, 



Part III, p. 246, PI. VII, figs. 1529. 



Specific Characters. Female. Very like the preceding species, as to 

 the general appearance of the body, but of much smaller size. Anterior 

 antennae comparatively shorter, scarcely exceeding half the length of the 

 cephalic segment, and rather thick at the base, being composed of 16 joints, 

 the 1st of which is very large, fully as long as the remaining part of the 

 antenna, and, in addition to the usual short marginal setse, provided with 3 

 comparatively large aesthetasks. Posterior antennae with the penultimate joint 

 (1st joint of the inner ramus) somewhat dilated in the middle, subfusiform in 

 shape, outer ramus resembling in structure that of the preceding species and 

 a little shorter than this joint. Oral parts and natatory legs of the usual struc- 

 ture. Last pair of legs with the middle joint very short, nearly circular in 

 form; terminal joint much larger, occupying more than half the length of the 

 leg, and armed at the somewhat obliquely truncated extremity with 3 slender 

 spines, the innermost of which is much the longest and, like the middle one, 

 not defined from the joint at the base. Spermatophore, attached to the genital 

 segment, of unusually large size and curving upwards along the dorsal face 

 of the urosome. 



Male of still smaller size than female, and differing from it in a similar 

 manner to that in the preceding species. Last pair of legs, however, of a 

 somewhat simpler structure; the left leg having no trace of an appendicular 

 ramus at the end of the 2nd joint, and only a single lamella outside the apical 

 claw, which is rather small. 



Colour in the living animal not yet ascertained. 



Length of adult female scarcely exceeding 0.71 mm.; that of male 0.68 mm. 



Remarks. This form was described by T. Scott in the year 1892 as 

 the type of his genus Pseudocyclopia. It is of much smaller size than the 

 preceding species, and moreover easily distinguished by the shorter and thicker 

 anterior antennas and by the somewhat different structure of the last pair of 

 legs in both sexes. 



2. Crustacea. 



