222 COCKERELL AND COLL1NGE : CHECK-LIST OF SLUGS. 



Unfortunately, however, it is not yet possible to classify 

 the whole series by the characters Simroth relies on, owing 

 to our want of knowledge concerning the genital organs 

 of many. If the groups are natural ones, very probably a 

 sufficiently experienced person might be able to classify 

 the species in them, even without reference to the anatomy ; 

 but I do not know of anyone, unless it is Dr. Simroth, 

 who could at present attempt tins with any chance of 

 success. 



V. taunaysi, as I pointed out in P. Z. S., 1891, p. 218, 

 has characters which separate it somewhat widely from the 

 type of Veronicella. We shall probably recognise it here- 

 after as the type of a distinct sub-genus, to which the 

 name Vaginula, Fer.. will apply. It does not fall properly 

 under either of Dr. Simroth's divisions. 



The group Acrocaulier is equivalent to typical Veroni- 

 cetta : Phyllocaulier and Pleurocaulier may hereafter have 

 to be named as sub-genera. 



Imerinia is a subgenus founded on a species from 

 Madagascar, supposed to be J', grandidieri. The year 

 before it was published, M. Ragonot applied the name 

 Imcrina to a genus of moths, and Mr. Gahan named a 

 genus of beetles Imerinus. I mention this, as some may 

 think this constitutes pre-occupation ; but it seems to me 

 that the difference of a letter sufficiently distinguishes the 

 slug name. 



The following description is taken from the specimens in 

 the British Museum, on which the subgenus Imerinia is 

 founded : — 



Length 64 mm., breadth 16^ mm., breadth of sole 

 5 1 mm. Female orifice 34 mm. from head, nearly 3 mm. 

 from sole. Sole very narrow, narrowest posteriorly, rather 

 rounded at end, not projecting. Mantle above and below 

 thickly impressed-punctate ; above with scattered raised 

 warts, 1 or 2 mm. apart. Respiratory orifice practically 

 median beneath end of sole. Some tufts of red-brown 

 bristles about 1 mm. long, on anterior right-edge of mantle. 

 A very slight impressed, hardly pale, middle-line of dorsum. 

 Colour dark reddish-brown ; no spots or bands. Two 

 other specimens lack the bristles ; one is darker, the other 

 paler, brown. 



Hab. Imerina, Madagascar (J. Wills). 



