139 



Outer lip thin, broadly bevelled on the inner side, of a black 

 colour ; perlaceous interior with nine longitudinal, narrow, 

 roundly elevated porcellanous ribs ; columella, white, broad, 

 and arched ; under side of body whorl black. 



It is of the same size as T. constricta, and aged examples have 

 the elongate-turbinate shape, as is the case with those of that 

 species. 



Habitat and Station. — On rocks below tide marks, Coymbra, 

 Head of the Bight, and near Wilson's Bluff. (Tate, many 

 examples.) 



Ethalia (?) cakcellata, nov. spec. PI. v. figs. 11a lie. 



Shell lenticular, obliquely-depressed ; spire very slightly 

 raised ; hyaline, upper and under surface transversely striated 

 and cancellated by longitudinal striae (the latter vary much in 

 strength, and in some specimens are obsolete) ; whorls 

 embracing, three and a half ; suture deep and narrow, bordered 

 by an opaque white band ; body whorl much larger than 

 preceding one, that of the adult shell enveloping the spire. 

 Aperture oblique, crescent-shaped, broader than high. Base 

 flattish or slightly convex, but concave around the umbilical 

 region. Columella broadly thickened, excavated, and spread 

 over the umbilical region to form a small, round, depressed 

 callosity. 



Major and minor diameters — - 085 and "065 inch. 



Habitat. — Shell sand, Holdfast Bay, St. Vincent's Grulf ; 

 Streaky and Fowler's Bays in the Great Australian Bight, 

 common (Tate). 



The species may be described in brief as a lenticular hyaline 

 Botella with a cancellated sculpture. So far it would seem to 

 fall in with Adams's genus Ethalia, whilst the thin callous 

 extension of the body whorl over the spire indicates a relation- 

 ship to Teinostoma ; but as the latter genus was founded for the 

 reception of rotelloid shells with distorted body whorls like 

 Cyclops and Streptaxis I prefer to assign the new shell to the 

 former genus. 



Angas has recently described a turbinated Ethalia (E. 

 Brazieri) from New South Wales ; E. Tasmanica is not only 

 questionably Australian, but its generic position is doubtful. 

 The genus now includes sixteen species, all of which, with the 

 exception of E. Brazieri and E. cancellata, inhabit the coasts 

 -of Japan, China, and Mexico. 



