272 ME. E. A. SMITH ON THE 



Douglas Eiver, Brisbane and Ipswich, Queensland, and Eastern 

 Creek near Chatsworth, N. S. "Wales (Brazier). 



This species, like most others in the genus, is subject to consi- 

 derable variation in form. The typical shell figured in the 

 ' Magasin de Zoologie ' appears unusually globose, and exhibits 

 very regularly curved outlines, whilst the majority of the speci- 

 mens which have come under my observation display a tendency 

 to somewhat flattened sides. This difference was considered 

 sufficient by Conrad for specific distinction ; hence he described 

 his L. perlevis. It is very doubtful whether this species is a 

 true Amphipeplea, upon which subject Martens (Ann. & Mag. 

 Nat. Hist. 1866, vol. xvii. p. 212) offers some very interesting 

 remarks. 



38. LiMNjEA (Amphipeplea ?) Phillipsi, a. Adams Sf Angas. 

 Amphipeplea Phillipsi, A. Ad. Sf Ang. Proc. Zool. Soc. 1863, p. 416 j 



Sowerby, Con. Icon. fig. 41 a-b. 



Limnsea Deshayesii {Adams), Sowerby, Con, Icon. fig. 95 a-b. 



Hah. Cornet Creek and Eoper's Lake, N. Australia {Port- 

 lEssington Expedition, 1845) ; Arnheim's Land (Stuarfs Expe- 

 dition). 



It is difficult to draw a line between this species and L. Lessoni. 

 The typical forms are very different, the latter having a very short 

 spire, whilst that of the former is comparatively long and acumi- 

 nate. But there are some varieties which appear almost inter- 

 mediate with regard to the height of the spire. The specimens 

 described by Adams and Angas have been liberally presented to 

 the British Museum by the latter gentleman. They are, I believe, 

 the young state of the large L. Desliayesii. Both were obtained 

 from North Australia, and both exhibit the same strong spiral 

 striation, a character entirely overlooked by Sowerby in his 

 slovenly monograph of this genus. 



39. LiMN^A (Amphipeplea?) Ano-ast, Sowerhy. 

 Limnaea Angasi, Sowerhy, Con. Jcora. fig. 11 a-b, species 12. 

 Hah. Port Darwin, North Australia. 



This is closely allied to L. Phillipsi, but has a shorter spire, is 

 rather more globose, more glossy, although exhibiting spiral stria- 

 tion, and of a brownish horny colour. Sowerby says it is " varie- 

 gated by opaque white interrupted stripes. In this respect the 

 species differs from aU the other known species." This is an inac- 



