118 



furrows ; the whole surface strongly and closely wrinkled trans- 

 versely. Last whorl regularly and moderately convex from the 

 middle to the base, spirally ribbed and sulcated ; umbilicus nar- 

 row, defined by a rib a little broader than the rest of the ribs, 

 which results from the successive infilling gi^owths of the siphonal 

 notch. 



Aperture oval, channelled posteriorly, corresponding with the 

 shoulder of the whorl ; outer lip thin, crenulated on the edge, 

 joined to the columella by a callous growth ; columella slightly 

 incurved, obliquely truncated and thickened at the front ; 

 siphonal notch shallow and narrow. 



Dimensions. — Leng-th, 14 ; breadth, 10 ; height of aperture, 10. 



Locality. — Lower beds at Muddy Creek (J. Dennant). 



Phos Gregsoni, Tate. Figured herewith, Plate iv., fig. 5. 

 Nassa sublirella, Tate. Figured herewith, Plate iv., fig. 2. 



FAMILY VOLUTID^. 

 Gexus Lyria. 



SYNOPSIS OF SPECIES. 



Costae, 20, terminating posteriorly in blunt points. 



1. L. haiyularia. 

 Costae, 30, terminating posteriorly in small rounded tubercles. 



2. L. geminata. 

 Lyria harpularia, Tate. 



Trans. Roy. Soc, S. Aust., 1888, t. 12, fig. 12, without des- 

 cription. 



Shell f usiformly ovate, somewhat thin, transversely costate ; 

 costse, about 20, on last whorl, narrow, subacute, slightly flexuous, 

 terminating posteriorly in blunt points on the slightly flattened 

 shoulder ; interstices wider than the costse, transversely and 

 spirally striated. Spire subacute, of six slightly convex whorls 

 terminating in a smooth puUus of one and a half whorls. Aper- 

 ture elliptical-elongate, outer lip thin, united to the pillar by a 

 thin callus ; columella with two prominent anterior folds and 

 numerous transverse rugosities ; canal very short, recurved. 



Dimensions. — Total length, 32 ; breadth, 17 ; length of aper- 

 ture, 22 ; breadth, 8 ; height of last whorl, 26. 



Localities. — Lower beds at Muddy Creek ; blue clays at 

 Schnapper Point. 



Lyria gemmata, spec. nov. Plate iii., fig. 4. 

 Similar to L. harjndaria, but usually narrower and less ventri- 

 cose with about 30 slender, less flexuous, ribs on the last whorl^ 



