292 ME. E. A. SMITH ON THE 



The distinct elevated spiral lines are far less raised than in 

 the P. alicicd of Reeve, yet more so than in several other Austra- 

 lian forms. It is in reality a link connecting the genus Glypto- 

 physa of Crosse with Physa proper. The lines of growth are very 

 distinct, and, crossing the spiral lirulso, give the surface a minutely 

 cancellated appearance. 



Two specimens from Bunyip Eiver, Victoria, sent by Mr. 

 Petterd to Mr. Taylor, who has submitted tliem to me, appear to 

 belong to this species. They differ in being of a brownish oliva- 

 ceous colour, and in having much fewer spiral lines. Neither of 

 them present the yellowish stripe or mark of periodic growth 

 on the last volution, which occurs in most of the examples from 

 "Western Australia. 



92. Phtsa exaeata, n. sp. (Plate YI. fig. 28.) 



Shell ovately fusiform, pale horn-colour, marl^ed with very dis- 

 tinct spiral striae and lines of growth. Whorls 4, convex. Apex 

 rather large, not acute. Last volution elongate, attenuated at 

 the base. Aperture narrow, acute above, and rather so inferiorly. 

 Columellar fold very slightly prominent. 



Length G millim., diam. 3. 



Sah. Depuch Island, Port Essington, N. Australia. 



The specimens here described may not be adult. The species 

 is remarkable for the comparatively large apex and the deep hori- 

 zontal striae; these are about four in number on the penulti- 

 mate whorl, and eighteen on the last. 



93. Phtsa (xImerta) caeinata, S. Adams. 



Physa (Ameria) carinata, H.Adams, Proc. Zool. Soc. 1861, p. 143; 

 Sowerby, Con. Icon. fig. 18 a-b. 



Kab. Boyne Eiver, Queensland. 



The aperture is feebly, indeed scarcely perceptibly, tinted 

 with rose, and certainly not the deep rosy colour represented by 

 Sowerby's figure. 



It is questionable whether this and the four following so-called 

 species are more than varieties of one form. 



94. Phtsa (Amekia) trukcata, H. Adams. 



Physa (Ameria) tmncata, H. Adams, Proc. Zool. Soc. 1861, p. 144; 



Sowerby, I. c. fig. 20. 

 Sai. Calliope Eiver, Burdekin Eiver, and Eockhampton, 

 Queensland. 



