INTEENAL ANATOMY OF THE GAMASIN.E. 315 



hairs from about - 02 millim. at the anterior to about 04 millim. at the posterior end 

 of the body ; distance apart laterally about - 01 millim. 



Ventral surface baired, all the plates of very thin chitin ; anal plate small, inversely 

 pyriform. Genital plate of female larger than in H. horrklus, widened and rounded 

 posteriorly, attached by its whole surface. Genital aperture of female a transverse 

 slit. There are two little lateral metapodic plates as in H. horrid/us ; stigmal plates 

 curved and very thin. 



Habitat. Found abundantly in the nests of the Common Mole (Talpa europma) in 

 England. 



L.ELAPS oribatoides, sp. n. (PI. XXXII. figs. 12-15.) 



Length without rostrum, about 



Breadth, about 



Length of legs, 1st pair, without caruncle or ungues, about 



The female of this species may generally be recognized among its neighbours of the 

 same locality by two large black spots on the dorsum, near the posterior end, which are 

 really produced by the excretory organs showing through the cuticle. 



Colour yellow-brown, not very dark. 



Texture. The whole dorsal surface is covered by a single unbroken chitinous plate; 

 the chitin is rather thin, and is entirely divided up, by very fine lines, into little scale- 

 like or angular spaces, measuring rather more in a direction across the body than in the 

 direction from anterior to posterior end ; in the former direction averaging about 

 •02 millim. No other markings ; the chitin otherwise smooth, but not polished. 



Shape. Almost elliptical, very slightly shouldered in front, rather rounder posteriorly. 



Mandibles of male (fig. 13). Fixed chela with a single sharp spine (the poison spine ?) ; 

 no other teeth. Movable chela not much longer than the fixed, broad and divided into 

 three parts, viz. : (1) the priucipal piece of the arm, which is truncated almost at a right 

 angle to its lower edge, and has its upper distal end a long curved point ; there is one 

 strong median tooth ; (2) a long narrow slightly undulated accessory piece projecting 

 beyond No. 1 ; (3) a broad outer lamina about as long as the accessory piece, and having 

 a rounded end with a notch in it. 



Epistome (fig. 15) rounded, with a few small triangular or tooth-like projections on its 

 distal edge, and a few fine radiating markings on its proximal dorsal surface. 



Legs not very long, second pair the thickest ; without apophyses in either sex. All 

 legs furnished with not veiy numerous hairs, and with roundish caruncles and very fine 

 claws. 



Dorsal surface provided with tine hairs, set not very near together in irregular trans- 

 verse rows, the hairs slightly longer than the space between the rows ; they all point 



46* 



