On the Tarantulidse in the British Museum. 273 



The upper whorls of this species are sometimes pale and 

 sometimes reddish ; this, however, may be due to staining 

 from the animal. The last whorl is invariably reddish, espe- 

 cially the first half. 



It is closely related to 0. otostoma, but may be distin- 

 guished by its less convex whorls, the different form of the 

 aperture, and the more thickened peristome, which is scarcely 

 lobed above, and also by the body- whorl being adnate to the 

 spire, whereas in 0. otostoma it is quite free. 



15. Opisthostoma pumilio. 



Testa 0. Austeni similis, sed minor, minus conica vel pyramidalis ; 



anfractus 5, perconvexi, liris obliquis leviter distantioribus 



instructi. 

 Longit. 2 millim. ; diam. maj. 2\, min. 1^; apertura f longa et 



lata. 



Hab. Rumbang, Sarawak. 



This very small species closely resembles 0. Austeni in its 

 general features. It is, however, quite distinct. It consists 

 of one whorl less, is of smaller size, has rather more distant 

 liras or lamella^ and also a more obtuse or less conical spire. 

 The coloration is the same as in that species. 



XXXVII. — Notes on the Pedipalpi of the Family Tarantulidse 

 contained in the Collection of' the British Museum. By R. I. 

 Pocock, of the British Museum (Natural History). 



[Plates VII. & VIII.] 



Family Tarantulidae. 



Subfam. Tarantulinm. 



(Simon, Ann. Soc. Ent. Fr. 1892, p. 50.) 



Three generic names have been employed for the species of 

 this subfamily, i. e. Tarantula, Phrynus, and Admetus. 

 Tarantula was first used by Fabricius in 1793 for the species 

 called Phalangium reniforme by Linnseus. Phrynus, on the 

 contrary, which was also erected for the reception of the same 

 reniforme, is not at present known to have appeared in print 

 before 1801 ; it was then used by Lamarck, who cited the 

 genus as Olivier's (Syst. Anim. p. 175). In the following- 

 year Latreille also published the name, and ascribed it to 



