96 ANOLACIA, DIPSACCUS. 



A. MARGINATA, Lam. PL 39, figs. 44-48. 



Yellowish or gray, a white band below the sutures, maculated 

 with orange-brown, a row of maculations above, and another on 



the fasciole. Length, 1 -5-1 '75 inches. 



Australia, Tasmania. 



A. monilifera, Reeve (fig. 45), A, lineata, Kiener (fig. 46), A. 

 oblonga, Sowb. (fig. 47) and A. obesa, Sowb. (fig. 48), are all 

 young shells of A. marginaia, as the specimens before me exhibit 

 all these variations in form. The last-named is said to occur 

 also at the Cape of Good Hope. 



A. ELONGATA, Gray. PL 39, fig. 49. 



Thin, white, sutural band ivory-white, columella not plaited. 



Length, 2*25 inches. 



Torres Straits, N. Australia. 



A. DIMIDIATA, Sowb. PL 39, fig. 50. 



Rather thin, transparent white, sutural band, which is very 



broad, opaque white. Length, -9 inch. 



Red Sea. 



I am not acquainted with this species ; it looks as though it 

 might be the young of A. elongata, Gray. 



C~~ Subgenus Anolacia, Gray. 



A. MAURITIAN A, Sowb. PL 39, figs. 51-53. 



Shell ovate, thin, spire depressed, bod3Mvhorl shouldered, 

 aperture wide, columella scarcely plaited, outer surface closely 

 but lightly covered with revolving striae ; yellowish white to 

 orange-brown. Length, 1 '75-2*25 inches. 



Madagascar, Mauritius, Australia. 



This is the A. torosa, Meuschen, according to Sowerby, a name 

 under which it is quite as well known as the one I have adopted. 

 A. scaphella, Sowb. (fig. 52), and A. aperta, Sowb. (fig. 53), are 

 miniature shells of this species. 



Subgenus Dipsaccus, Klein. 

 A. GLABRATA, Linn. PL 39, fig. 54. 



Yellowish white to orange, white-bordered at the sutures and 

 on the supra-fasciolar groove, columella and callus white. 



Length, 2-3 inches. 



West Indies. 



