BOTHRIEMBRYON. 15 



Var. PALLIDUS Tate. PI. 3, figs. 63, 64, 65. 



Smaller than indutus, oblong- or ovate-conic, with only an ex- 

 tremely narrow umbilical chink, white (in the only specimens known 

 to me, which have been denuded of any cuticle they may have had). 

 Surface sculptured with slight growth-wrinkles becoming stronger 

 and puckered at the finely crenulated suture ; the spire and upper 

 part of the last whorl decussated by spirals cutting the wrinkles into 

 oblong granules ; this decussation disappearing on the middle and 

 lower part of the last \\horl, and sometimes partly obsolete below 

 the last suture. Whorls 5^ to 5-J-, separated by sutures a little 

 deeper than in indutus. Aperture white within. 



Alt. 25, diam. 14, longest axis of aperture 14.5 mill. 



Alt. 23.5, diam. 14, longest axis of aperture 13.5 mill. 



Alt. 28, diam. 15, longest axis of aperture 16 mill. 



South Australia: "Widely diffused over the Bunda Plateau, and 

 the dead shells are to be met with in such prodigious numbers in 

 many places that a barrow-load could be gathered within an hour, 

 and over the less sterile portions a foot can hardly be set down 

 without crushing one. Westward it extends to the Roe Plains 

 [Port Eucla], and eastward to Coymbra, and inland thence for a 

 few miles. It does not inhabit the country east from Fowler's 

 Bay " ( Tote } . 



Bulimus indutus Menke, var. pallidus TATE, Trans, and Proc. 

 and Rep. Philos. Soc. Adelaide, S. Australia, for 1878-9, p. 135 

 (1879). 



Of this form I have received only dead specimens, from P3ucla, on 

 the border between South Australia and Western Australia, whence 

 the form has been traced eastward around the head of the Great 

 Australian Bight, by Professor Tate. It differs from indutus in be- 

 ing somewhat less oblong, with the aperture wider, and surface more 

 granulated. It is widely separated geographically, irtdutus being 

 reported only from the Darling River region, in the extreme west, 

 while the whole range of the immediate allies of B. injiatus lies 

 between that region and the Bunda Plateau. 



I do not know that living specimens have been found. 



B. BULLA (Menke). 



Shell elliptical-ovate, perforate, rather solid, longitudinally striate; 

 whitish under a thin greenish-yellow epidermis, painted with stripes 



