177 



ing segments combined; seta of outer edge attached near the middle; apical 

 setae rather unequal in length, the 2 middle ones being much longer than the 

 other 2, which are rather small. Anterior antennas shorter than the cephalon 

 and of a similar structure to that in the preceding species. Posterior antennae 

 however rather unlike, being far less robust and imperfectly prehensile; basal 

 joint not at all expanded; 2nd much the largest and angular at the end behind; 

 3rd joint very short and armed at the end anteriorly with an unguiform spine 

 accompanied in front by 2 short setae; last joint well developed and carrying 

 at the tip 3 subequal, almost setiform claws, behind which 3 setae are attached. 

 Maxillae with the masticatory lappet securiform in shape and almost nacked 

 outside; palp with one lateral and 2 apical setae. Anterior maxillipeds with 

 the terminal process much curved and clothed outside with delicate spinules. 

 Posterior maxillipeds well developed; propodal joint scarcely smaller than the 

 basal one, and armed inside, about in the middle, with a ciliated anteriorly- 

 curving spine; dactylar joint unguiform and having at the base a similar 

 spine to that of the propodal joint accompanied by a short seta. Natatory 

 legs comparatively more slender than in the preceding species; inner ramus 

 of 4th pair somewhat shorter and much narrower than the outer, terminal 

 joint with the inner edge quite smooth, outer edge exhibiting about in the 

 middle a well-marked ledge, apex with 2 very unequal spines flanked on each 

 side by a somewhat projecting corner. Last pair of legs with the free joint 

 exceedingly small and slightly produced at the end outside; both apical setae 

 very short. Ovisacs of moderate size, oblong oval in form, and slightly 

 divergent. 



Colour pale yellow, with an orange tinge. 



Length of adult female 0.73 mm. 



Male unknown. 



Remarks. This form was described and figured by Scott in the above- 

 quoted treatise from a solitary female specimen. As observed by that author, 

 it somewhat resembles, in the general form of the body, Pseudanthessius 

 gracilis Glaus. It is however of far inferior size and, one closer examination, 

 differs materially in the structure of the several appendages, agreeing in this 

 respect with the other species of the present genus. 



Occurrence. I have met with this form occasionally both of the west 

 and south coasts of Norway in moderate depths. All the specimens obtained 

 were of the female sex. 



Distribution. British Isles (Scott). 



