FEESHWATEE SHELLS OE AUSTEALIA. 281 



62. Phtsa concinna, A. Adams tSf Angus. (Plate VI. figs. 

 13-14.) 



Physa concinna, .4. Adams ^~ Angus, Proc. Zool. Soc. 1863, p. 417; 

 Soiverby, Con. Icon. fig. 35. 



Sah. Arnheim's Laud, N. Australia {Angas). 



Sowerby's figure, taken from the type presented to tlie Museum 

 by Mr. Angas, is not at all good. The somewhat flattened dextral 

 outline of the body-whorl is incorrect. It should be curved, and 

 the upper volutions are also convex. Tlie columella, too, does 

 not exhibit the broad white callosity portrayed in the figure. The 

 surface is minutely decussated, the apex brownish, aud tlie suture 

 generally bordered by a narrow brownish line. 



63. PnxsA OLiYACEA, A. Adams 4' Angas. (Plate VI. fig. 15.) 

 Physa oUvacea, J. Adams Sf Angas, Proc. Zool. Soc. 1863, p. 416; 



Sowerby, Con. Icon. fig. 34. 



Sah. Arnheim's Land, N. Australia {Angas'). 



The description in the ' Conchologia Icouica ' is very mislead- 

 ing. Sowerby there describes the " whorls rather angular, the 

 apical one mamillated; last whorl posteriorly angular ; aperture 

 chestnut within." On the contrary, the single specimen in 

 the IMuseum, which is the type and the shell he figured, has 

 slightly convex Avhorls, without the faintest indication of angula- 

 tion. As the apex is eroded, a fact mentioned by Angas in his 

 descriptiou, it is absurd to state that the apical whoii is mamil- 

 lated. I presume he did not examine the specimen with a lens, 

 but merely described the appearance to the naked eye. The last 

 whorl also is not the least augular, and the aperture is of the 

 same olivaceous tint as the exterior, and not chestnut. In the 

 figure the columellar fold is placed too high up, and is much too 

 prominent. 



64. Phtsa (Isidoea) Hainesii, Tryon. 



Physa Hainesii, Tryon, Amer. Journ. Conch, ii. p. 9, pi. ii. fig. 9. 



Physa latilabiata, Sowerby, Con. Icon. fig. 33 a-b. 



Hah. Victoria Eiver and Depuch Island, N. Australia. 



This is a very distinct species, and readily recognized by its 

 pallid colour and the great expansion of the peristome over the 

 umbilicus. 



