213 



A. jacksoniensis, Reeve (type locality, Port Jackson), is 

 represented in Tate's collection of South Australian shells, 

 but I am unable to separate them from A. flam mm, Quoy and 

 Gaimard, and agree with Pritchard and Gatliff, who unite 

 them. The type locality of F. mixta, Reeve, is Port Phillip, 

 Victoria. Tate and May make jacksoniensis, Reeve, a syno- 

 nym of A. (jealei, Angas, as a distinct species, owing 

 to the pre-occupation of Reeve's name by Lesson. 

 The two type shells of P. gealei, in the Bri- 

 tish Museum, from South Australia, presented by 

 Mr. G. F. Angas, are 24 mm. by 21, regularly roundly oval 

 in the baste, with an almost perfectly regular thin margin, 

 with no radial ribbing, nor any radiating dark colour bands. 

 I think they are large albino variants of A. criicis, Ten.- 

 Woods. 



A. gealei, Angas, was formerly regarded in South Aus- 

 tralia as a synonym of .i. marmorata, Ten. -Woods, No. 399, 

 Adcock's Handlist ; and Pritchard and Gatliff gave it priority 

 and made the latter the synonym ; but examination of the 

 type shows absolute non-identity. 



The shell is dertainly very variable. One form has 

 numerous well-marked radial riblots, and a sharp apex, and 

 may be regarded as the typical A. flammea, Quoy. A second 

 has no radial riblets, or only obsolete, is a larger shell, and 

 is the typical A. crucis, Ten. -Woods. A third has compara- 

 tively few radial costae, which are broad and rude, and some- 

 what corrugate the surface, and is the Fatellu jack- 

 soniensis, Reeve. A fourth is very like the second, 

 but differs in having no radial colour markings, or radial 

 ribs, and is the A. gealei, Angas. But all four can be graded 

 into one another in continuous series. The comparative 

 height varies, some shells being quite conical, and others very 

 flat. The colour ornament may consist solely of the dark 

 spatula, or a aistinct broad Maltese cross may be present, or 

 each arm may be broken up into two or more brown lines, or 

 brown lines may intervene between them, or only brown 

 radii may occur, or the ornament may be a brown- 

 and-white tessellation or reticulation at the apex only, or 

 all over the shell, or combined with the cross. The inner 

 border may ue wholly white, or have a brown border, or be 

 articulated brown and white, or show only the four broad 

 ends of the brown cross. Among all the specimens collected 

 I have not found one coloured like A. cruciata, Linn., with 

 the white rays at the centre of the front and back and sides, 

 and the brown between. 



