150 



from two to four spiral tlireadlets ; the whole surface trans- 

 versely striated ; the strife crenulate the edge of the lirae and 

 produce with the spiral threadlets a neat cancellation in the 

 iiiter-spaces. 



Last whorl a little tumid on the base, which contracts 

 abruptl}-, and is suddenly prolonged into a narrow beak ; sur- 

 face ornamented as the rest of the shell. Aperture round, with 

 a sharp angle at the top ; outer lip sharp, thin, well arched, 

 erenuUited on the margin, faintly lirate within ; inner lip 

 slightly concave, with a thick oblique twist-like fold at the 

 front ; canal narrow, long, slender, and nearly straight. 



Length, 40; breadth, 15; aperture, length 12, width 7; 

 length of canal, 11. 



Locality. — Blue clays at Schnapper Point. 



4. Fasciolaria decipiens, spec. nov. Plate viii,, fig. 1. 



Shell elongately fusiform, with a high turrited spire ending 

 in a small blunt mamillate apex of one and a half smooth 

 rounded whorls, the tip immersed. 



Whorls nine and a half, of regular increase ; the anterior 

 ones roundly angulated and nodulated medially, concave behind 

 and somewhat contracted in front, ornamented with revolving 

 threads and transverse riblets — the rudely square depressions 

 transversely striated. 



Tubercles, twelve on the last whorl, bluntly or subacutely 

 conical, trisected by three peripheral lirse ; lirae acute, equi-^ 

 distant, about twelve on the penultimate whorl, those on the 

 medial and anterior areas stouter than those on the posterior 

 slope, sometimes with a threadlet in the intervening furrows. 



Body whorl with a high posterior slope, bluntly convex on 

 the periphery, thence gradually contracted into a long, broad, 

 almost straight beak. Aperture elongate-oval ; outer lip with 

 a thin porcellanous thickening on the slightly crenulated 

 margin, smooth within ; inner lip callously spread and adpressed 

 over the columella ; columella with two oblique plaits hardly 

 visible from without. 



Length, 6S ; breadth, 25; aperture, length 21, width 10; 

 length of canal, 16. 



Localities. — Lower beds at Muddy Creek ; gastropod-bed of 

 the Eiver Murray Cliffs ; Table Cape {B. M. Johnston !). 



Each locality has its own racial variety, and it may be desir- 

 able, when fuller material is at hand, to apply distinctive 

 names to each. 



The type form from Muddy Creek is the most lanceolate, the 

 breadth to the length is as 1 to 2 7 ; the Murray variety differs 

 by its more angulate whorls, sharp, stout and simple tubercles, 

 and is proportionately broader, the breadth to the length being 



