A NOTE ON TWO SPECIES OF ASTRALIUM FROM 

 PORT JACKSON. 



By H. Leighton Kesteven. 



Under the name of Astralium tentoriforme^ Jonas, two species 

 of that genus have, in Sydney, been united, 'i hese two present 

 the anomaly of two species, undeniably distinct, so like one 

 another that in some instances only the operculum will show to 

 which species a specimen belongs. In the neanic stage, however, 

 the two species are easily separable. 



ASTRALIU3I (Uvaxilla) fimbriatum, Lamarck. 



IVochus fiiiibriatus, Lamarck, Anim. sans Vert. ed. i., \\\., p. 12, 

 1822 : Delessert, Recueil, etc., pi. 34, figs. 6a and 6, 1841; 

 Quoy & Gaimard, Voy. Astr. iii., p. 229, pi 61, fig. 8, oper- 

 culum tigs. 11, 12, 1835 ; Chenu, Man. Conch, i., fig. 2573 ; 

 Philippi, Conch. Ca)), ii., p. 121, pi. 20, fig. 7, 1846. 



Carinidea Jimbriata, Swainson, Proc. Roy. Soc. Van Diemen's 

 Land, 1854, Vol. iii., p. 39, pi. vi., figs. 3, 4. 



Calcar fimbriafAiiiiy Kiener & Fischer, Coq. Viv. Turbinacees, iii., 

 p. 38, pi. 32, fig. 2, 1880. 



Astralium fimbriatum, Tryon, Man. Conch, x., p. 239, pi. 54, figs. 

 47, 48, 49; operculum, pi. 60, f. 46, 1888. 



Ti'ochus squamifh-us, Koch in Philippi, Abild. i., pi. 4, tig. 9, 

 p. 138, 1844. 



