696 AUSTRALIAN AND TASMANIAN MOLLUSCA, 



H (h. — Sow and Pigs Reef, Port Jackson, -i fathoms, sand and 

 broken shells; Cook's landing place, south side of Botany Bay, 

 in shell sand and beach shingle, not common (J. Brazier, 1864); 

 Middle Harbour, under stones at low water; Green Point, 

 Watson's Bay, under stones and in shell sand (A. U. llenn). 



The name badio. having been already in use by Mr. Petterd in 

 1884 fqr a Tasmanian species, I have changed Dr. Boog Watson's 

 name to Rissoia Jacksoni, after Sir George Jackson to whom the 

 Navigator Captain Cook named Port Jackson. 



7. RissoiA (Amphithalamus) olivacea, Dunker. 



1867. Alvania olivacea, Dunker, Novara Expedition (Mollusca), 

 p. 11, PL II. fig. 14. 



1875. Diala ttimida, Tenison-Woods, Proc. Roy. Soc. Tasmania, 

 p. 147. 



1884. Rissoa Diemenensis, Petterd, Journ. Conch. Vol. iv. No. 5, 

 p. 138, Species 13. 



1887. Litiopa (Diala) (umida, Tryon, Man. Conch. Vol. ix. p. 

 283. 



1887. Rissoia olivacea, Tryon, loc. cit. Vol. ix. p. 339, pi. 66, fig. 

 43. 



1887. Rissoia Diemensis, Tryon, loc. cit. Vol. ix. p. 368. 



1894. Rissoia (Amphithalamus) olivacea, Dunker; Henn, Proc. 

 Linn. Soc. N.S.W. (2) Vol. ix. p. 174, No. 71. 



7/rti.— Sydney, Manly Beach and Botan}' Bay (Frauetifeld ): 

 Swansea, Tasmania, rare (Lograrid); Table Cape and Tamar 

 Heads, Tasmania ( W. F. Petterd): Green Point, Watson's Bay, 

 and Middle Harbour, Port Jackson (A. U. Menu); Long Bay, 

 South of Sydney, in shell sand and alive under stones, low water. 



It is very .strange that Tenison-Woods should have called this 

 a Diala when it is a Rissoia; and Mr. Petterd described it under 

 the name of Rissoa Diemenensis. Having both the Tasmanian 

 species before me I find that they are merely varieties of Rissoia 



