282 



ME. E. A. SMITH ON THE 



65. Phtsa (Bulinfs) acutispiea, Tryon. (Plate YI. fig. 16, 

 after Tryon.) 



Physa (Bulinus) acutispira, Tryon, American Journ. Conch, vol. ii. p. 9, 

 pi. ii. fig. 10. 



" Shell cylindrically ovate, elongated, very thin, transparent, 

 highly polislied ; spire elevated, very acute, suture slightly im- 

 pressed ; whorls 5, oblique, slightly convex ; aperture narrow- 

 ovate, two thirds the total length ; columella a little folded, and 

 somewhat turned back at the base. Very light horn-colour." 



.Length 12 millim., diam. 6. 



JIai. Australia. 



66. Physa pteamidata, Sowerhy. (Plate YI. fig. 17.) 

 Physa pyramidata, Sowerhy, Con. Icon. fig. 62. 



Sab. Plinder's Island, Bass's Straits {J. Milligan) ; Yictoria, 

 S. Australia {Brazier). 



Both the figure and description of this species are bad. The 

 former represents the penultimate whorl not sufficiently convex, 

 the aperture too large, and the coluniellar fold too prominent. 

 The description may thus be emended : — 



Shell solid, livid horn-colour, pyramidal ; spire produced ; whorls 

 7, rather convex, the penultimate somewhat inflated, the last, 

 elongate, a little ventricose. Aperture auriform, of the same 

 colour within as the exterior, but with a broad purplish-brown 

 stain within the lip, which extends along the base and gradually 

 becomes broader. Columellar fold not at all prominent, unless 

 the shell is turned so that the eye sees far within the aperture. 



67. Phtsa dtspak, Soioerly. 



Physa dispar, Sowerby, Con. Icon. fig. &Q a-b. 



Sal. Sydney {Soioerhy) ; Swan Eiver {Mus. Cuming). 



68. Phtsa aciculata, Bowerly. 

 Physa aciculata, Sowerby, Con. Icon. fig. 69. 

 Sai. New South Wales. 



A very distinct species, on account of the great length of the 

 spire. 



69. Phtsa stjbinelata, Sowerhy. 



Physa subinflata, Sowerby, Con. Icon. fig. 6 a, species 5. 

 Sab. South Australia {Sowerby). 



