108 Mr. J. Blackwall's Characters of some 



concave within, and are connected with the sexual organs, 

 which are highly developed, exhibiting several curved spiny 

 processes, (a certain indication that the animal has attained 

 maturity,) and are of a dark red-brown colour. 



Mr. T. Blackwall discovered this minute species in October, 

 1832. It is found in abundance under stones in the township 

 of Cheetham, near Manchester. 



WalcJcenaeria cuspidata. 



This species is precisely similar in colour to WalcJcenaeria 

 acuminata) but in the form of the pectus it resembles Walc- 

 Jcenaeria cristata. The upper part of the cephalothorax is 

 not so gibbous as that of either of the other species belonging 

 to the genus, and has no indentation in the medial line of the 

 posterior region. 



Length, from the anterior part of the cephalothorax to the 

 extremity of the abdomen, -^th of an inch ; length of the ce- 

 phalothorax ^ ; breadth -^ ; breadth of the abdomen ^V- 

 The legs of the first and last pairs, which are the longest and 

 equal in length, measure |th, and those of the third pair, 

 which are the shortest, ^th. 



The male is rather smaller than the female, but the relative 

 length of its legs is the same. In the trapezoid formed by the 

 four intermediate eyes, immediately in front of the posterior 

 pair, it has a small, conical, acute prominence surmounted 

 by a few fine hairs. The fourth joint of the palpi terminates 

 in two apophyses, the smaller one projecting on the under side; 

 the longer has a prominence at its exterior part near the base, 

 and curves outwards in front of the fifth joint, which is some- 

 what oval, convex externally, concave within, comprising the 

 sexual organs; they are highly developed and complicated in 

 structure, with a strong spine externally curved into a cir- 

 cular form. 



This spider occurs on rails in the vicinity of Manchester, 

 in the month of November. 



By the pointed form of the anterior part of the cephalo- 

 thorax, the converging maxillae, and the structure of the legs, 

 the spiders of this genus are connected with the Drassi; but 

 they differ from them essentially in the disposition and rela- 

 \ive size of the eyes, and in the figure of the lip. 



Genus, Textrix. 



Eyes eight in number, unequal in size, disposed in two 



transverse rows on the anterior part of the cephalothorax ; 



four constituting the anterior row, which is slightly curved, 



are adjacent and minute, the two intermediate ones being the 



