284 On some new and little-hnown Arctic Spiders. 



legs ; but numerous short grey hairs give the prevailing tinge 

 of colour to them all. 



m\Q palpi are moderate in length and strength ; they are of 

 a dark blackish brown colour and furnished with hairs and a 

 few strong bristles, especially on the radial joint, which is equal 

 in length to the cubital, though not quite so strong ; the digi- 

 tal joint is not very large ; it is, however, longer than the 

 radial, but not so long as the radial and cubital joints together; 

 the palpal organs are simple, with a short, curved, pointed, 

 strongish spine towards the fore extremity on their outer side ; 

 the digital joint has no claw at its anterior extremity. 



The /aZces are tolerably long, moderately strong, straight, 

 conical, and a little directed backwards towards the sternum ; 

 they are of the same colour as the cephalothorax. 



The maxillcej labium, and sternum are of the normal form, 

 and of a deep brown colour. 



The abdomen is oval, broadest behind, somewhat trun- 

 cated at its fore extremity, and considerably convex above, 

 especially at the fore part ; the upperside is clothed pretty 

 densely with short grey pubescence ; the normal elongate 

 marking on the fore half is reddish yellow-brown before, but 

 black-brown on the hinder part ; it has a sharp prominent 

 point near the middle on each side ; and the hinder extremity 

 is truncated, with its outer corners elongated in a pointed form. 

 A longitudinal row of alternate black and greyish white spots 

 runs from outside the termination of the anterior marking to 

 the spinners ; and within the area comprised by these two rows 

 of markings are several short, indistinct, dark, angular bars or 

 chevrons in a longitudinal line. The underside is dark brown, 

 also clothed with short grey pubescence ] the spinners are very 

 short and moderately strong, the inferior pair being the shortest 

 and strongest. 



This spider, which appears to me to have been hitherto 

 undescribed, was found by Dr. Hart, during the late Arctic 

 Expedition, in Discovery Bay. It may be distinguished 

 readily by the form of the central longitudinal thoracic stripe. 



List of Spiders. 



Dictyna boreah's, sp. n. Linyphia sobria, Thor. 



Tegenaria detestahtlis, sp. n. ■ turbatrix, sp n. 



JErigone Whymperi, sp. n. Thanattts formieinus, Clerck. 



arctica, White. Lycosa gJacialis, Thor. 



psychrophila, Thor. groenlandica, Thor. 



p)-ovocans, sp. n. Tarentula exasperans, sp. n. 



vexatrix, sp. n. 



