ACMTKA. 00 



interrupted sulci. Margin acute, elegantly fringed within with 

 chestnut or tawny; inside white, clouded with pale chestnut; spat- 

 ula tawny, sharply defined. Length 22, breadth 20, alt. 7 mill. 

 (T.-W.) 



Northwest coast of Tasmania. 



A.petterdi T.-W., Proc. Roy. Soc. Tasm. for 1876, p. 155, 1877. 



Larger than A. septiformis, an old enlarged specimen of which it 

 somewhat resembles. It is dull white and shining, with the lines 

 of growth very distinctly marked. 



A. SEPTIFORMIS Quoy & Gaimard. PI. 37 figs. 93, 94, 



Shell oval, convex, very delicately radiately striated, tessellated 

 with green or white, ornamented with radiating brown lines ; inside 

 blue or whitish, lineolate with brown. 



Length 14, breadth 12, alt. 6 mill. (Q.) 



King Georges Port, W. Australia, Kiama and near New Castle, 

 New South Wales; Tasmania; on rocks between tides. 



Patelloida septiformis Q. & G., AstroL, p. 262, t. 71, f 43, 44.— 

 Tectura septiformis Angas, P. Z. S. 1867, p. 220. — Acmcta septi- 

 formis Ten.-Woods, Proc. Roy. Soc. Tasm. for 1876, p. 50, 1877, 

 (animal.) 



A. scabrilirata Angas, and A. eantharus Rve. are considered 

 synonymous by Tenison-Woods. 



A. LACiNiATA Reeve. PI. 35, figs. 36, 37. 



Shell oblong, ovate, rather sharply convex, laterally slightly com- 

 pressed, radiately densely elevately striated ; whitish, reticulately 

 rayed everywhere promiscuously with numerous fine red lines, net- 

 work around the apex interruptedly open ; interior bluish-white. 

 (Eve.) 



Australia. 



P. laciniata RvE. Conch. Icon. f. 100, 1855. 



Compare the following species. 



A. CANTHARUS Recve. PI. 37, figs. 1, 2. 



Shell ovate, rather thin, convex ; apex very anterior, sharp, 

 hooked; smooth; black, irregularly blotched with white; interior 

 blackish-chestnut. (Rve.) 



New Zealand; Tasmania f 



P. ca7itharus Rv., Conch. Icon. f. 131, 1855. — A. eantharus Hut- 

 ton, Man. N. Z. Moll. p. 88, 1880. 



