209 



The only habitat given was South Australia, but Tate's 

 shells almost certainly came from Moonta Bay, a/S they were 

 in a tube with others which T have described in this paper as 

 Scufclllna alhoradiatd, sp. nov., and which have been ob- 

 tained in numbers at Moonta Bay by Mr. Zietz, 



Nacella stowae, i^pec. nov. PI. x., figs. 4, 5. 

 Shell oval, thin, translucent, narrower in front, about half 

 as wide as long, its height less than half its greatest width. 

 Apex at the anterior sixth, simple, non-spiral. Numerous 

 fine diverging axial striae, with crowded minute sublenticular 

 accremental strige. Apex red ; sixteen equidistant, pink, in- 

 creasing radial rays, each composed of two to four lines ; 

 white opaque blotches, irregular in shape behind the apex, 

 somewhat concentrically arranged ; a central linear one just 

 behind the apex. Spatula snaped as in Patella; fairly dis- 

 tinct, margined in front opaque white; behind this pinkish- 

 brown, which extends backwards in two sh^rt diverg-ing 

 flames ; between these a white opaque flame extends back from 

 the apex of the shell. The rest of the spatula is mottled 

 with wavy, opaque, white blotches. 



Dim. — Lengrth, 5*3 mm.; breadth, 3'7 mm.; height, 2*1 

 mm. 



Locality. — Shell sand, beach, Port MacDonnelL and 

 King's Point, Encounter Bay (Miss Stow). 



Familv ACM^ID^. 



Genus Acm^a, Eschscholtz. 



Acmaea octoradiata, Hutton. 



Patella octoradiata, Hiitton, Cat. Marine Moll, of New Zea- 

 land, 1873, p. 44; Acmcea saccharina, Linne, rar. perplexa, Pils- 

 bry.. Tryon's Man. Conch., 1891, vol. xiii., p. 50, pi. xxxvi., figs. 

 69"^ 70, 71; Acmcea perplexa, Pilsbry., Taylor, Nautilus, 1892, vol. 

 tvi., p. 89; Acmcea saccharina, Linne. Tate and May. Proc. Linn. 

 Soc, N.S.W., 1901, vol. xxvi., nt. 3, p. 411; Patella perplexa, 

 Pilshry., Pritchard and Gatliff, Proc. Roy. SoC; Vict., 1903, vol. 

 XV., pt 2, p. 194; Acmoia octoradiata, Hutton, Hedley, Proc. 

 Linn. Soc, N.S.W., 1904, pt. 1, p. 188. 



This is very rare in South Australia. It has been 

 found on the beach at Wallaroo Bay and at Port MacDonnell. 



Acmaea alticostata, Angas. 

 Patella cdticostata, Angas, Proc. Zool. Soc., Lond.. 1865, p. 

 56 pi ii f. 11; tvpe locality, Port Lincoln; Hedley, Proc. Lmii. 

 Soc, N.S.W., 1904, pt. 1, p. 189. 



From Port MacDonnell, along the whole coastline to 

 Western Australia, and recorded from Tasmania, Victoria, 

 and New South Wales. 



