222 KECOUDS OF THE AUSTRALIAN MUSEUM. 



distinguished Ijy its sharper keels, plain sutures, and far finer 

 ornament ; and from the second by its less ornate keels, as well 

 as by the convexity of the posterior sutural areas. Of the two 

 remaining species in Victorian Tertiary strata, B. decomjMsita, 

 Tate, has a much shorter spire, while B. angustifi'ons, Tate, is 

 characterized by rounded keels and overlapping sutures. The 

 recent species is thus easily separable from any of its fossil 

 cono"eners." 



Tekebra lauretan^, Ten. Woods. 



(Plate xxxvii., fig. 9). 



Tcrdrm lauretmuc. Ten. Woods, Proc. Linn. 8oc. N. S. Wales, ii., 

 IS 78, p. 262. ' 



This unfigured species has hitherto been known only from a 

 single specimen, the type now in the Australian Musem, which 

 has ten whorls in a length of twenty millimetres. A fine specimen 

 with sixteen whorls in a length of forty-one millimetres was taken 

 in three hundred fathoms, and provided the material for the 

 illustration now presented. 



Caxcellakia scobixa, xJj. 1tOV. 



(Plate xxxviii., fig. 12). 



Shell small, solid, bicunical, tabulate, imperforate, rough 

 sculptured. Colour grey ("? bleached). Whorls five, including 

 the protoconch, each with a broad concave shelf on the summit, 

 perpendicular at the sides and contracted at the base. Proto- 

 conch papillate, smooth, a whorl and a half wound obliquely to 

 the axis of the main shell. Sculpture : sharp crested wave ribs 

 traverse the whorls obliquely, between and parallel to these are 

 fine growth lines ; on the last whorl the ribs amount to fifteen. 

 The radials are crossed by sjDiral raised cords, which develop a 

 tubercle at the passage of each radial, between e^ich cord one or 

 more raised threads. Aperture oblique, subtriangular. Columella 

 witii three plaits, the upper very oblique. Inner lip overlaid with 

 a niicroscopically granular callus ; outer grooved internally. 

 Length 8 mm. ; breadth 5 mm. 



The new species can best be compai'ed with a Port Curtis form 

 provisionally identified as C. australis, Sowerby, than which the 



