FKESHWATER SHELLS OF ATTSTBALIA. 273 



curacy of observatiou ; for the "opaque ■n-hite interrupted stripes " 

 are merely accidental blemishes where the shell has been eaten 

 into and the coloured surface removed. Of this I speak with 

 certainty, as the actual type is in the Museum, presented by 

 Mr. Angas. 



40. Ltmx^a (Amphipeplea ?) ynfoSA, A. Adams Sf Angas. 

 Amphipeplea vinosa, ^4. Ad. Sf Ang. Proc. Zool. Soc. 1863, p. 415; 



Sowerby, Con. Icon. fig. 37. 



Sah. Adelaide River, INorth Australia (^Stuarfs Expedition). 



This is remarkable for the depth of its colour. It is less acu- 

 minate in the spire and more shouldered in tlie body-whorl than 

 L. Aiigasi, agreeing rather in these respects with L. Lessoni ; but 

 that is a larger species, somewhat more globose, and of a pale 

 tint. 



It appears to me a matter of considerable doubt whether this 

 and the three preceding forms have, or bave not, any real specific 

 differences. In the Museum series, consisting of over a hundred 

 and fifty specimens, I cannot draw any quite satisfactory limits. 

 L. vinosa perhaps is the most easily distinguishable ; for, judging 

 from the ten examples before me, it appears to be always of a 

 uniform vinous tint. L. Lessoni is the most globose of the four 

 species, L. FhiUipsi the most elongate, and L. Angasi somewhat 

 intermediate between the two latter, and of a rather brighter 

 colour. All exhibit more or less spiral striation. Scarcely two 

 specimens are precisely alike, and the form of the aperture, the 

 height of the spire, and the character of tbe columellar twist 

 are subject to the greatest variation. 



41. LiJSJNiEA ArriNis, Parreyss. (Plate Y. fig. 14.) 

 Limnseus affinis, Parreyss, Kuster, Con.-Cah. p. 55, pi. xii. figs. 5-6. 

 Sal). New Holland. 



Of this species the British Museum possesses examples pur- 

 chased of Parreyss under the above name. It is of a narrower 

 and more ovate form than the preceding species. 



42. LiMifiEA BEETiCAUDA, Sowerhy. (Plate V. figs. 17-18.) 

 Limnseabrevicaufla (Parreyss MS.), Sowb. Con. Icon. fig. 135 ; Theobald 



Sf Hanley, Conchol. Indica, p. 6-4, pi. clviii. fig. 7. 

 Sab. Australia {Parreyss in JBrit. Mas.); Cashmere (W. Blan- 

 ford). 



This species calls to mind the European L. auricularia. Sowerby 



19* 



