175 



absence of better material, however, the writer hesitates to quote 

 M. ctilvm in absolute synonymy with the French species mentioned. 



Dimensions (of a mutilated specimen). — Length 27 mm. ; breadth 

 14 mm. ; lenijth of aperture 7 mm. 



Form, and Loc. — P]ocene : Cape Otway, Victoria. 



G. 9455. Two specimens. Purchased. 



Murex (Triplex) bifrons, Tate. 



1888. Murex {Pteronotm) bifrons, Tate, Trans. Eoy. Soc. South Aust. 



vol. X. p. 97, pi. i. fig. 12. 

 1895. Murex {P(eronotits) bifrons, Tate and Dennant, id. vol. xix. pt. 1, 



p. 111. 



Shell tumid, paitly trigonal ; protoconch composed of at least 

 two obtuse, smooth whorls, the earlier portion commonly being 

 turned round and buried horizontally in the succeeding turn, the 

 sudden twisting interfering with the symmetry of the turns as 

 a whole. In some cases the last turn of the protoconch envelops 

 tlic earlier portion of the apex. The shell is specially charac- 

 terized by having a well-pronounced longitudinal rib on the earlier 

 whorls between each varix ; there are the usual three foliated 

 varices on the body-whorl, but these latter are not bi'oad, and 

 they are discontinuous. The body-whorl is ornamented with 

 about twenty equidistant slender spiral threads, transversely 

 striated. 



Dimmxions. — Length 17 mm. ; breadth 11 mm. ; length of 

 aperture and canal 1 1 mm. 



Form, and Loc — Eocene : Cape Otway, Victoria. 



G. 9456. Two examples of the adult. Purchased. 



Murex (Triplex) amblyceras, Tate. 



1888. Murex {Chicoreus) amblyceras, Tate, Trans. Roy. Soc. South Aust. 



vol. X. p. 101, pi. ii. fig. 12. 

 1893. Murex amblyceras, Tate and Dennant, id. vol. xvii. pt. 1, p. 218. 



Shell elongate, with elevated spire, rounded whorls, and rather 

 long canal ; protoconch composed of one and a half smooth, obtuse 



