Mr. Blackwall's Descriptions of new Species of Spiders. 649 



longest and equal in length, third pair the shortest. Eyes seated on 

 black spots ; the intermediate ones of the anterior row are much the 

 smallest of the eight. Abdomen oviform, glossy, thinly covered with 

 hairs, convex above, projecting over the base of the cephalo-thorax ; its 

 colour is yellowish red. Sexual organs black, faintly tinged with red. 

 Plates of the spiracles dull yellow. 



The male resembles the female in colour, but the anterior part of his 

 cephalo-thorax is more prominent, and the relative length of his legs is 

 different, the first pair being the longest, and the second and fourth pairs 

 equal in length. The tibiae of the first and second pairs of legs are some- 

 what dilated underneath, near their extremity, and these enlargements 

 are thickly clad with long, fine hairs. Third joint of the palpi remark- 

 ably large, very prominent on the inner side, and provided with an acute 

 apophysis in front, near the outer side ; fourth joint crescent-shaped, the 

 lower limb of the crescent being turned outwards, in front of the fifth 

 joint, which is oval, convex and hairy externally, concave within, com- 

 prising the palpal organs; these organs are highly developed, compli- 

 cated in structure, prominent, with two long, slender, curved, black 

 spines on the under side, and are of a red-brown colour. 



This species, which bears a strong resemblance to Neriene ruhens, occurs 

 under stones and on plants growing in the woods at Oakland, near Llanrwst. 

 The male has the palpal organs fully developed in October. 



36. Neriene ahnormis. Cephalo-thorace appendicibusque rufescenti-brunneis ; 

 abdomine brunneo saturatius obscurfe marmorato. 



Maris cephalo-thorax pedesque rault6 magis rufi, abdomen saturatius, 

 pedes anteriores posterioribus longiores. 



Length of the female yth of an inch ; length of cephalo-thorax xi ; breadth 

 Y9 ; breadth of abdomen -^ ; length of an anterior leg \ ; length of a leg 

 of the third pair -j^. 



Cephalo-thorax oval, convex above, glossy, with slight furrows on the sides, 

 and an indentation in the medial line of the posterior region. Mandibles 

 powerful, conical, convex in front, armed with teeth on the inner surface 

 and inclined towards the sternum, which is heart-shaped. Maxillae 



