i88 Mr. E. A. Smith's Diagnoses of 



vided with a sharp foliaceous carina along the middle of the 

 under surface. Tarsi also all triquetrous ; the first joint in 

 fore legs expanded above into a sharp foliaceous crest and 

 longer than the rest taken together ; in the intermediate legs 

 the first tarsal joint is equal to the last three, in the posterior 

 to all the rest. Colour dark brown, with two pale longitudinal 

 dorsal stripes: the legs and the horns variegated with luteous. 



Male unknown. 



Total length 5 inches 3 lines ; head 2*5 lines ; prothorax 2 ; 

 mesoth. 11; metath. 10; abdom. 27 + 6 = 33; fore femur 

 15'5, tibia 18, tarsus 4'75 ; intermediate femur 9"75, tibia 

 9'75, tarsus 3"75 ; posterior femur 12'5, tibia 12*5, tarsus 4. 



Hah. Perak, Malay peninsula. Communicated by Dr. G. 

 E. Dobson. 



This species belongs to the same group as Lonchodes 

 amaurops and uniformis^ Westw., crawangensis, De H., ver- 

 rucifer^ W.-M., and hrevipes and spimcollis^ G. R. Gray, &c., 

 the last of which only it resembles in the peculiarly curved 

 condition of the thighs. 



April 13th, 1877. 



XLIX. — Diagnoses of new Species of Pleurotomidas in the 

 British Museum. By Edgar A. Smith, Zoological De- 

 partment. 



The various genera or groups of Pleurotomidse require 

 thorough revision ; for at present they are badly described and 

 their limits unrecognizable. The following species are placed 

 provisionally in those sections of the family which are usually 

 accepted, as I have not yet completed the investigation of 

 the whole of the collection. 



Pleurotoma amicta. 



Testa solida, fusiformis, alba, epidermide tenui flavescente amicta, 

 spiraliter lirata vel carinata, incrementique lineis oblique striata ; 

 anfract. 14-15, superiores tricarinati, prope suturam canalicu- 

 lati (carina raediana duplici, supra et infra seulptura peeuliari 

 quasi corrugata ornata), inferiores 2-3 carinis 5-6 cincti, anfr. 

 ultimus pluricarinatus ; spira elongata, crassa, acuminata ; aper- 

 tura breviuscula, superne elongato-ovata in canali breviusculo 

 leviterque obliquo et recurvo producta, longitudinis testae f aequans, 

 intus tenuiter lirata ; labrum tenue, margins crenulatum, superne 

 ad cariuam duplicem anguste fissum ; columella suboblique tor- 

 tuosa, laevigata. 



Long. 50 mill., diam. 15. 



Hah. Sandwich Islands. 



