95 



«. Last yarix broadly expanded. 



A. No nodules between the varices. 



Distantly finely lirate ; finely striated transversely. 



M. velificus. 



Strongly lirate, with arcbed discontinuous threads 



between. 2. J/, rliysus. 



B. One inter variceal nodule. 



Upper wborls inornate ; shell ovate. 



3. M. calvus. 

 Upper whorls lirate ; shell narrower. 



1. M. velificus, var. 

 h. Last varix narrowly winged ; extended into a spine. 

 Spine long ; no nodules between the varices. 



4. 21. manuhriatus. 

 Spine inconspicuous ; three intervariceal nodules. 



5. 3£. trinodosus. 

 II. Varices three on body whorl, increasing posteriorly ; 



discontinuous ; outer lip denticulate. 



Spiral threads, about 20, slender. 6. M. lifrons. 



Spiral threads, about 8, stout. 7. M, clidymus. 



1. Murex velificus, spec. nov. Plate i., fig. 8. 



Shell trigonal elongated, very thin. "Whorls seven, o£ which 

 the one and half apical whorls are small, smooth, and rounded. 

 The rest of the shell is provided with three varices. Whorls 

 flatly convex, ornamented with fine spiral ridges on the 

 anterior half (four on the penultimate whorl) and transverse 

 striae and threads. The varices are widely foliaceous, erect, 

 axial, and regular ; ornamented with radial ridges continued 

 from the lirse of the whorls, and arched transverse striae and 

 threads ; the margin of the varices is entire or inconspicuously 

 serrated. 



Aperture small, oval ; peristome continuous, thick- 

 ened ; the outer lip crenulated on the margin. Canal long, 

 nearly closed, slightly oblique, tapering to a slender recurved 

 point. 



Some individuals from the Kiver Murray cliffs possess an 

 intervariceal tuberculation. 



Total length, 28 ; breadth, 7 ; length of aperture and 

 canal, 18. 



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

 Schnapper Point, Port Philip ; Eiver Murray cliffs. 



2. Murex rhysus, spec. nov. Plate i., fig. 7. 



Shell trigonal elongated, thin ; whorls seven (apex wanting), 



somewhat convex ; varices three, widely foliaceous, erect, 



slightly obliquely directed, somewhat f alcately reflexed ; margin 



entire. Surface ornamented with stoutish, narrow, angular. 



