^^SO'] THE GENUS GIftASIA. 291 



li. The capreolus apparently does not exist in some Helices ; but 

 as It IS not always to be detected in RelLv asnersa, these require 

 more careful examination. 



4. The capreolus serves to aid in the intromission of the seminal 

 Huid, or rather the saving of it, and renders copulation more certain 

 and intimate. Lister considered that the spinules of the capreolus 

 retained the body in the female organ. 



The more we know of the species of Indian Mollusca which 

 have mtherto been placed in the genus Helicarion of Ferussac 

 (rabl. Syst. 1821), of which a form, U. cuvieri, Fer., was the type 

 (trom Australia), the more certain it is that few of the Indian forms 

 It any, can be retained in it. Of tliese, two or three are so very 

 distinct they may safely be separated and also described in more 

 detail. 



Nothing is more satisfactory than to get hold of a type specimen 

 ot a genus ; and acting on a note from my friend Mr. Geoffrey Nevill 

 and with the kind aid of Mr. Edgar Smith, I have been able to find 

 and examine the type of Dr. J. E. Gray's genus Girasia, repre- 

 sented by a single specimen in spirit, which was collected by Sir 

 Joseph Hooker in the Khasi Hills. It proves to be my Helicarion 

 {1-loplites '.) theobaldi, described in the P. Z. S. 1872, p'. .517. 

 1 ^t^ s^l>SennsHoi>lifesvins proposed for these Khasi-Hill slugs 

 by Mr. Theobald m the J. A. S. B. 1864, p. 244. No description 

 ot the genus or species is given, save that it was 2 inches long, from 

 icria bhat, and was probably my H. theobaldi, I. c. p. 517. This 

 group I now propose to start from, and take up first. 



Girasia, J. E. Gray, Cat. PuIm.Brit. Mus. p. 61 (March 1855). 



m^toTtT''^ description (which I give below) is imperfect; no memion 'is 

 made of the mucous glana, save in the synopsis of the generic section in which 

 It IS placed .-"Body united to the back of the. foot,%nly separatee by the 



Z?'of\f "■ '%'r fl^^ll P""'Y, ''^°'''^' '''''• ^-^P-^l^d' wilh a solid iex' 

 Back of the neck under the collar with three grooves, the central groove 

 sYdeTlhe ideT nf f "ble-edged the lateral on! single', bent down ofx each 

 side to the sides of the head at the back of the lower tentacles' ; the head is 



Se a Lh r^nT h''° '^P°f"^ °" ^^' *°P ''^' "^^ ^*^«'^ 1"^^ t^° perforations^; 



tlieapeituieol the generative organs is rather behind the base of the right 



en acle. The hinder part of the body attached to the back of the foot neafly 



to Its hinder end, which is separated from the deep concavity on the back of 



P^nMl? ^' '"^ .tP./""^'' •"'°'' S^"°°^<'- ^" «1^ these particulars the animal 

 exactly agrees with the Portuguese species of Drttsia "3 

 Type hookcri, Gray. Khasi Hills. 



These species are added : — 



Girasial rutellum, Button. Kandahar, Kabul. Evidently a 

 Pormacella. ^ 



Girasia extranea, Fer. Habitat? (Hist. Moll. ii. 96.) 



" Shell a thin horny pellicle, without any appearance of a spire." 



1 This sentence is not very clear or accurate. 



■' This is merely the description of the state of the spirit-specimen with the 

 eye-tentacles inverted as usual. 



3 Then why was it separated ? 



