388 



PERCY SLADEN TRUST EXPEDITION 



Eyes of posterior row almost straight, the posterior medians smaller than the posterior 

 laterals and closer to one another than to them. Width of clypeus about equal to the 

 diameter of an anterior eye. 



Labium broader than long. 



Metatarsi of anterior legs furnished with a single pair of spines, which are situated at 

 a little distance from the proximal end of the segment. 



According to M. Simon, who has kindly examined a couple of specimens of this new 

 genus, which I sent to him, it is very closely allied to Pleorotus Sim. and is a little inter- 

 mediate between that genus and Theleticopis. 



39. Thomasettia seychellana, n. sp. (Fig. 6 A — c). 



Colour. Carapace pale brown, faintly marked anteriorly and in the middle with fine 

 palish longitudinal stripes, and with a radial series of pale streaks or spots towards the 

 middle ; its lateral margins also faintly marked with a series of pale dots and the hinder 

 margin palish (Fig. 6 b). Sternum and ventral surface of coxae and trochanters of legs 

 pale brown in colour. Femora of legs also pale brown and marked with yellowish bands ; 





A. 



Fig. 6. Thomasettia seychellana, n. sp. A. Vulva, b. Carapace, c. Palpal organ from below. 



the distal segments (with the exception of the tarsi) are a deeper shade of brown than the 

 femora. In a number of specimens the abdomen is almost quite dark above, but even in 

 these specimens traces of a pattern, picked out in yellowish brown, are usually present. 

 In the paler examples (especially the young ones), in which the abdomen is distended, the 

 ground colour of the abdomen is rather pale yellowish brown (both above and below), the 

 dorsal surface and the sides being speckled with dark brown, the central specks above 

 often uniting to form V-shaped markings, which are arranged in a longitudinal series. 



Chelicera. Three teeth are present on the lower side of the fang-groove, the inner 

 one of them is much smaller than the other two and is separated from them by a short 

 interval. The teeth above the fang-groove are also three in number. 



Legs. Tibiae of anterior legs furnished with five pairs of spines below ; tibiae of 

 posterior legs with three pairs below. 



$. Carapace very slightly longer than the tibia of the first leg and equal in length 

 to the tibia of the second and to the metatarsus of the fourth. 



Palp. Patella and tibia of palp about equal in length. Tibial apophysis bifid, the 

 upper part of it being curiously shaped ; inner side of the lower surface of the tibia also 



