432 rev. o. v. Cambridge on [June 16, 



The / ulces are long, strong, and prominent near their base in front ; 

 near their inner extremity in front is a single strong sharp tooth ; and 

 along their inner edge, beneath the fang, are some other smaller 

 teeth ; their colour is similar to that of the cephalothorax. 



The maxilla are long and strong, slightly curved, and inclined to 

 the labium, which is short and of a somewhat semicircular form ; the 

 colour of these parts is similar to that of the legs. 



The sternum is heart-shaped, of a dark yellow-brown colour, and 

 furnished with a few longish erect bristly hairs. 



The abdomen is oval, not very convex above, but projecting con- 

 siderably over the base of the cephalothorax ; it is of a dull blackish 

 brown colour, clothed thinly with hairs. 



The adult female is larger than the male ; the abdomen is more 

 convex above, as well as much larger ; the falces want the strong 

 sharp tooth in front near their extremity ; but in other respects there 

 is but little difference. 



The form of the genital aperture is peculiar, and the process con- 

 nected with it is large and prominent. 



Two adults of each sex were contained in a small collection of 

 Spiders kindly collected for me in Oregon Territory in 1872 by Lord 

 Walsingham. It is a fine species, and, although allied to several 

 European ones, is yet very distinct from all of them. 



Erigone spinifera, sp. n. (Plate LV. fig. 3.) 



Adult male, length rather less than 1 line. 



The cephalothorax of this species is of a dark but dull yellow- 

 brown colour, with the normal grooves and indentations well marked, 

 and (as also the margins) of a darker hue ; it is of a round oval form, 

 the lateral constrictions on the margins at the caput being exceed- 

 ingly slight ; the fore part is bluff and bold ; and immediately behind 

 the eyes is a nearly round but not very large somewhat tuberculiform 

 eminence ; and directly behind this the occiput is a little gibbous, 

 giving (in profile) the appearance of a double eminence ; the ocular 

 region, as well as the eminence behind it, is furnished with a few 

 short coarse hairs ; and the height of the clypeus is at least two thirds 

 of that of the facial space. 



The eyes are small, not greatly unequal in size, and, although pre- 

 serving the usual general position, yet present a remarkable similarity 

 in their actual position to that of the genus Enyo — namely, three 

 groups, two of three eyes each, forming a curved line at each end of 

 a transverse oblong space, and between these two groups is a third, 

 of two eyes near together. This grouping is occasioned by the un- 

 usual relative distance between the eyes of the hind central pair, 

 bringing each of them within less than an eye's diameter of the hind 

 lateral eye on its side ; those of each lateral pair are seated a little 

 obliquely on a tubercle ; the fore centrals are inconspicuous, being 

 seated on a dark spot, and contiguous to each other ; the length of the 

 line formed by the eyes of the hind central pair is less than that 

 formed by the two fore laterals, and would almost exactly lie between 



