178 82 



W. of Koh Chuen, soft clay and mud ('/a). 



Long. 6-5 mm. 



Distribution: — North Australia, Mast Head Reef (Queensland), Sydney and 

 Port Jackson, Flinders (Victoria), New Zealand. 



With regard to the generic name Kellya, it was established by Tukton in 1822 

 as Kellia. Jeffreys says that the genus is named after "the Rev. J. M. 0' Kellij of 

 Dublin," consequently, it can neither be written Kellia, nor (as Bucquoy, Dautzen- 

 BKHG and DoLLFUs write) Kellyia,^ but naust be written Kellya. 



Kellya rotunda, Desh. 



Eiijcimi roliiinia, Deshayes, Proc. Zool. Soc. I^ondon, XXIII, 1855, p. 181, No. 1. 

 Kellia — — Angas, Proc. Zool. Soc. London, 18G7, p. 927, No. 98. 



— — — var., Edg. Smith, Rep. on the Lamellibrancliiata of the Challenger Exped., 



p. 202, pi. XI, fig. 5. 



— — — SowERBY, Marine Shells of South Africa, 1892, p. (12, pl. 4, fig. 93. 



— — — Pritchard and Gatlief, Proc. R. Soc. Victoria, XVII, 19(14, p. 225. 



Koh Kram, 30 fathoms (2). Between Koh Mesan and Cape Liant, 9 fathoms (1). 

 Between Koh Mesan and Koh Chuen, 25—38 fathoms, stones and shells (13 1. 



Long. 3 — 10 mm. 



Distribution: — Moreton Bay, Newcastle (New South Wales), Sydney and 

 Port Jackson, Holdfast Bay (South Australia, Brit. Mus.), Bass Straits. (Sowerby 

 records it from Port Elizabeth and Edg. Smith from Port Alfred (Cape Colony)-). 

 Probably the forms from South Africa which Sowerby and Edg. Smith have had 

 before them do not belong to Deshayes's species from South Australia. Sowerby's 

 figure does not agree exactly with Deshayes's diagnosis, but as the figure is very 

 bad, nothing definite can be concluded on this basis. Edg. Smith regards K. rotunda, 

 Desh., to be "doubtfully separable" from A', suborbicularis, Mtg., •' and in this he is 

 undoubtedly right. Among the specimens collected in the Gulf of Siam both 

 Deshayes's type-form (from Moreton Bay), and the variety Edg. Smith descrijjes 

 and figures from the Challenger Expedition, are to be found. 



Kellya rosea n. sp. 



(P). Ill, Figs. 19-201. 



This species is almost circular in outline. It is thin and of a dull glass-like 

 consistency, pink, gently arching, with fine concentric lines of growth, not parti- 

 cularlj' convex. The umbones, which are situated at about the middle of the 

 length of the shell, are slightly elevated above the hinge-line. The hinge consists 

 of two cardinal teeth in the left valve and a single one in the right. The right 

 valve has also an oblong, flat, triangular lateral tooth, parallel with the hinder 



' See W. H. Dall, Transact. Wagner Free Inst. Sc. Philadelphia, vol. Ill, 1895, p. 5ß3. 



- Journal of Malacology, vol. XI, 1904, p. 26. 



3 Annals & iVlag. Nat. Hist., (,6) X, 1892, p. 132. — Proc. Malac. Soc. London, V, 19Ù2, p. 163. 



