380 MR. G. C. ROBSON ON LAND AND 



This example is very weathered, and precise determination is thns pre- 

 chided. It appears to be near T. ligatum, Miiller, though, as far as can be 

 made out, sufficiently distinct. 



15. *Tropidophora balteatum, Sowerhy. 



Sowerby, P. Z. S. 1873, p. 452. 

 One example from woods on limestone soil, Ambongo. 



16. *Ampullaria madagascariensis, E. a. Smith. 

 Lake Alaotra. 



Ambongo. 



Ponds and streams in W. Madagascar. 



EUTHYNEURA. 



PULMONATA. 



Suborder Basommatophora. 



Fam. L I M N ^ I d ^. 



17. *LlMN^A HOVARUM, Iristram. 



Tristram, P. Z. S. 1863, p. 61. 



Lake Alaotra. 



The examples of this species arc all very much eroded, and it is not possible 

 to be quite sure if the sculpture alluded to l)y Smith (P. Z. S. 1882, p. 385) is 

 present, though traces appear to remain. 



L. specularis, Morelet MS. (B.M.) is a synonym. 



Suborder Stylommatophora. 



Fam, Limacid^. 



18. *Urocyclus pinguis, n. sp. (Plate 35. figs. 6, 7.) 



Locality. Vide no. 1 {c. Appendix). 



This species and the Veronicella described below have had names proposed 

 for them in spite of the fact that preservation in alcohol has had the result of 

 discolouring them. Reliance has been placed in the other superficial characters 

 for determining them^ with the result that it has been impossible to find any 

 described species with which it is possible to identify them. 



Body swollen and stout, moderately carinate, the posterior part of the body 

 traversed by longitudinal grooves which occasionally are bifurcated, and the 

 interspaces between which are marked by smaller grooves set at right angles 

 to them. 



