7S "TEHHA NOVA" EXPEDITION. 



it was stated that there were two small cardinal teeth in the left valve. Cue of 



these, immediately beneath the umho, should perhaps lie regarded rather as a 



thickening of the hinge-line than a tooth. The second distinct denticle is just in 

 advance of the umlio. 



55. Ti'/liini/a antai'Cticii, Smith. 



Te1liini/(i antarctica, Smith, "Discovery " Lamellibranchiata, p. 3, pi. II, figs. IG-lGu (1907). 



Station 331. ( >ff Cape Bird Peninsula, entrance to McMurclo Sound, 250 fathoms. 



(July two specimens obtained, <_'i//nniuin subquadratum, Pelseneer,* is the same 

 size and very similar in form, but is described as flattened arid reddish brown. 

 Montaguia charcoti, Lamy,f and Tellimya minium, Thiele,J are also closely allied to the 

 present species. 



56. Aiiat/na I'l/i/if/i-ii, King aud Broderip (1831). 



For references and synonymy, see Lamy, Deuxieme Expe'd. Antarct. Francaise 

 (1908-1910), Moll. p. 21. 



Cape Evans, McMurdo Sound, February 8th, 1911, in 5 fathoms (1). G. Lillie). 



A single specimen containing the animal. The species has a circumpolar range, 

 and also occurs at Kerguelen Island. Mr. Hedley (Brit. Antarct. Exped. 1907-9, 

 Moll. p. 3) states that it was found "abundant from 7-30 fathoms." 



57. Thracia meridionalis, Smith. 



Tliracla meriillonalig, Smith, " Challenger ' Lamellibranchiata, p. 68, pi. VI, figs. 4-4B 

 (1885) ; "Discovery" Lamellibranchiata, p. 1 ; Lamy, Exped. Antarct. Franc., Pelecyp. , 

 p. 15 ; id., Deuxieme Exped., p. 22 ; Hedley, Brit. Antarct. Exped. 1907-9, Biol., vol. II, 

 Mollusca, p. 3. 



Stations 316, 331, 348, 349, 356, and Evans Cove, Terra Nova Bay, Victoria 

 Laud, 30 feet above sea level in glacier (R. E. Priestley). 



A single dead valve only from the last locality, probably blown there. 



2. NEW ZEALAND. 

 1. fleluioniscus radians (G-melin). 



Patella rudianx, Giuelm, Syst. nat., p. 3720 (1790). 



Helcioniscus radians: Pilsbry, Man. Conch., vol. XIII, p. 139, pi. LXIX, figs. 25-39, 

 pi. XXIII, figs. 4, 6-8; Suter, Man. N.Z. Moll., p. 81, pi. VII, fig. 13. 



Station : Bay of Islands. 



One specimen The species is very variable, very common, and widely distributed 

 throughout New Zealand. //. antipodum (Smith), regarded by Suter (Manual, p. 79) 

 as a separate species, I now regard as a variety of //. radian*. The figures illustrating 



s Voy. "Belgica," Mollusca (1903), p. 15, pi. IX, fig. 124. 

 t Exped. Antarct. Franc., Pelecyp., p. 13, pi. I, figs. 13, 14. 

 J Deutsdie Sudpolar-Expcd., vol. X 1 1 1, p. 284, pi. XVIII, fig. 13. 



