200 HUGH WATSON. 



Type. — The type of subspecies is in the Natal Museum, 

 Pietermaritzburg-. 



Affinities, etc. — The single specimen of this foi'm differs 

 greatly from the last subspecies, although it was found in the 

 same localit3\ In some respects it is intermediate between 

 Apera gibbonsi s.s. and the next subspecies, but it seems 

 impossible to associate it with either of these forms, and it 

 must therefore stand alone until further examples have been 

 collected. It will be noticed that owing to the length of the 

 posterior extremity the respiratory opening is proportionately 

 further forward than in the other forms. 



Apera gibbonsi lupata n. suhsji. 



External Characters (PL VIII, figs. 18, 19). — Animal 

 intermediate between A. gibbonsi s.s. and A. g. rubella 

 both in shape and in the reticulation of the skin, being 

 usually a little broader and less coarsely reticulated than the 

 typical form of A. gibbonsi, and a little narrower and less 

 finely reticulated than A. g. rubella. Colour variable; 

 sometimes dark like A. g. rubella, sometimes light as 

 in A. gibbonsi s.s. In the typical form the mottling is 

 inconspicuous and there is only a very slight trace of the 

 paler median dorsal band. 



This form (and possibly also the last subspecies) may be 

 slightly smaller than A. gibbonsi s.s. The following- 

 are the measurements of a specimen which seemed to be 

 practically mature : 



Length . . 46 mm. Greatest height . 7 mm. 



Breadth in middle 7'5 „ Distance of resp. 



Breadth at resp. opening from hind 



opening . . 6 „ end . . . 8 „ 



Breadth of foot-sole 4 „ 



Internal Characters. — Shell much depressed. Radula 

 (PI. XVII, fig. 99 ; PI. XIX, fig. 124 ; text-fig. 3, d, p. 1.59) 

 with a comparatively small number of very large teeth; 

 central tooth typically absent ; cusps somewhat curved and 



