FKESHWATEB SHELLS OP ATJSTEALIA. 289 



not met with in P. acutispira ; tliere are three or four of them 

 on the last whorl. 



I name this species after my friend and colleagne Mr. Etheridge, 

 by whom the specimens were collected and presented to the 

 Museum. 



85. Phtsa ptlosa, Teiiison-Woods. 



Physa pilosa, Tenison- Woods, Trans. Roy. Soc. Victoria, 18/8, vol. xiv. 

 p. 63. 



Shell subumbilicated, thin, glossy, inflated, obliquely broadly 

 ovate, milky white or fulvous, subpellucid; whorls 3, last in- 

 flated and oblique, two apical ones small, acute, regularly longi- 

 tudinally striated ; periostraca luteous, with regurlar pilose or 

 punctate lines ; suture coronated; aperture oblique, ovate, pro- 

 duced anteriorly ; labrum thin ; labium reflexed. 



Lat. 6 mill., long. 11. 



Hal. Melbourne. 



" This may possibly be only a variety of P. crelriciliata. It 

 differs from it in being thinner, lighter in colour, with a very 

 thin periostraca — the extremely small spire, with the oblique 

 and inferiorly produced aperture." 



86. Phtsa aeachnoidea, Tenison- Woods. 



Physa aradmoidea, Tenison- Woods, Trans. Roy. Soc. Victoria, 18/8, 

 vol. xiv. p. 63. 



Shell elongately ovate, or subcyiindrical, rather solid, opaque, 

 shining or clothed with a periostraca ; shell brown or yellow, 

 with white spots ; apex acute. Whorls 6, rapidly decreasing, 

 slightly convex and sloping, striate lengthwise and transversely; 

 striae granularly dotted, which is only visible under the lens, dots 

 disposed in spiral lines. Aperture oblique, pyriform, produced 

 anteriorly, chalky white inside ; plait thick, but visible only by 

 looking, as it were, upwards through the umbilicus. 



Long. 12 mill., lat. 5|- ; long, apert. 7, lat. 3^. 



Sab. Mordialloc, Yictoi'ia. 



" This species is probably ciliated in the young or fine con- 

 dition." 



87. Phtsa taeraensis, Tenison-Woods. 



Physa yarraensis, Tenison-Woods, Trans. Roy. Soc. Victoria, 1878, 



vol. xiv. p. 64. 

 " Shell subumbilicate, thin, diaphanous, pale horny, shining ; 



20* 



