280 Rev. O. P. Cambridge on some new 



with several curved spines and spiny processes towards their 

 fore extremity. 



The falces are neither very long nor strong ; they are 

 slightly divergent, and have a strong backward inclination, 

 being also of a rather paler colour than the cephalothorax. 



The maxillcB are very short, rather strong, and slightly 

 inclined to the labium, which is also very short and broad, 

 and, Avith the sternum (which, however, is darker), of the 

 same colour as the cephalothorax. 



The abdomen is of tolerable size, of a regular oval form, and 

 projects considerably over the base of the cephalothorax ; it is 

 of a black-brown colour, probably very glossy in life, and 

 clothed with short hairs. 



The female is larger than the male, but resembles it in form 

 and colours. The form of the genital aperture is simple, but 

 characteristic. 



Adults of both sexes were found during the late Arctic 

 Expedition in latitude 82° 27' and 82° 33' in June 1876. 



Erigone vexatrix, sp. n. PI. VIII. fig. 6. 



Adult female, length rather more than 1| line. 



This spider resembles E. provocans very closely in the 

 profile of the cephalothorax, as well as in its colours, but, 

 besides being much larger, the lateral marginal constrictions 

 at the caput are distinctly marked ; the eyes also differ some- 

 what in relative position, the intervals between those of the 

 hinder row being equal. The falces are much stronger, less 

 directed backwards, and (in profile) are considerably pro- 

 minent at their base in front. The legs also are stronger, 

 especially the femoral joints ; they have more numerous slender 

 erect bristles, and are of a clearer yellow-brown colour than 

 those of E. provocans. The abdomen is oval, jet-black, 

 glossy, clothed with coarse hairs, and projects considerably 

 over the base of the cephalothorax. The genital aperture is 

 of a semicircular form, situated in front of a roundish pro- 

 minence. 



This spider was found during the late Arctic Expedition at 

 Discovery Bay by Dr. Hart, M.D. 



Gen. LiNYPHiA, Latr. 



LinypTiia sobria. 



Linyphia sobria, Thor. CEfvers. af K. Vet.-Akad. Foih. 1871, p. 685. 



An adult of each sex was received from Spitzbergen, where 

 they were found by the Rev. A. E. Eaton and kindly sent to 

 me in June 1874. 



