16 



STUDIES ON AUSTRALIAN MOLLUSCA. 

 Part IV. 



{Continued from Vol. xxv., |?. 732.) 

 By C. Hedley, RL.S. 



(Plate ii.) 



Flammulina gayndahensis, Brazier. 



Helix (Thalassia) Gayndahensis, Braz., Proc. Linn. Soc. N. S. 

 Wales, i. 1875, p. 2. 



(Plate ii., figs. 17-19.) 



An example from the original lot has supplied the opportunity 

 of illustrating this hitherto unfigured shell. It measures : height, 

 4 mm. ; major diameter, 7 mm. ; minor diameter, 6 mm. With- 

 out some knowledge of the anatom}^ its classification cannot be 

 certain. The consideration of shell characters suggests to me 

 that its place is next F. delta, Pfr., as a second member of the 

 subgenus called Hedleyoconcha by Pilsbry."^' 



Tritonium sinense, Reeve. 

 Try on, Man. Conch, iii., p. 20, pi. xi., fig. 85. 



This tropical species appears to have escaped notice as an 

 inhabitant of the coast of N. S. Wales. I have seen an adult 

 specimen taken at the Black Rocks, near Ballina, N. S. Wales. 



A near ally, T. caudatum, Reeve, has already been recorded b}'" 

 Angasf from Port Stephens and near the mouth of the Macleay 



* Pilsbry, Guide to the Study of Helices, 1894, p. 18. 

 fAngas, P.Z.S., 1877, p. 179. 



