171 



whorls convexly angular, with three nodular bands, one at the- 

 posterior suture, one median, and the third at about half the 

 distance between the keel and the anterior suture. 



Last whorl transversely obliquely costated and nodulated 

 by spiral ridges. Costae about 10 — 12 ; lirse eight, the one next 

 the suture is separated from the keel by a wider space than 

 that which intervenes between the succeeding ones. 



Aperture oval, large, variced externally ; outer lip smooth 

 within ; inner lip smooth, slightly reflected, callously extending 

 posteriorly ; columella sharply and obliquely truncated. 



Senile examples occur which have added another whorl (as- 

 fig. 6b), and by reason of the posterior varix has a somewhat 

 distorted spire. 



Dimensions of an ordinary full grown example — Length,. 

 14 ; breadth, 85. Of a senile example — Length, 17 ; breadth, 

 10. 



Localities. — One of the most characteristic fossils in the upper 

 beds at Muddy Creek, very rare and small in the uppermost 

 portion of the lower series ; Jemmy's Point, Cunninghams 

 and other localities in Gippsland {JV. H. Gregsonl'), 



This species seems to resemble N. granifer, Kiener, but the 

 callus of the inner lip is very restricted. 



3. Nasa sublirella, spec. nov. 



Shell small, ovate, with the costse cut into nodules by 

 revolving ridges, four on the penultimate whorl; outer lip 

 tuberculate within, the posterior tubercle much larger than the 

 rest ; inner lip callously reflected, tuberculate. It resembles 

 stumpy specimens of JV. lyrella, Beck, but the body whorl i& 

 not so inflated, and the spire is longer ; the spiral ribs on the 

 body whorl are usually eight, not ten, and the nodulations are 

 larger and well defined, not confluent, as is generally the case 

 in N'. lyrella ; and whilst in the latter species the cost?e towards- 

 the lip usually fade away before reaching the base, in the fossil 

 species they are continued to the base. 



Length, 95 ; breadth, 6. 



Locality. — Lpper beds at Muddy Creek. 



ExpLANATiO]S' OP Plates. 



IS'.B. — The figures are of the natural sizes, except when; 

 otherwise stated. 



Plate I. 



1. Typhis disjunctus, Tate. Muddy Creek. Enlarged. 



2. Typhis acanthopterus, Tate. Schnapper Point. Enlarged.. 



3. Murex (Ocinebra) biconicus, Tate. Murray Desert. 



