uo 



long depressions ; there are eight rows of punctures on the 

 penultimate whorl. 



Last wliorl a little sloping to the suture, but sliglitly attenuated 

 to the bent and reverted sliort beak. Aperture narrow, oval- 

 oblong, with a spiral callosity at the posterior angle; outer lip 

 thin, sliglitly ecurved medially, stoutly Urate within ; columella 

 witli four thick approximate plaits, increasing in size from the front. 



Dimensions. — Length, 17 ; width, 5 ; length of aperture, 8. 



Locality. — Lower beds at Muddy Creek. 



12. Mitra leptalea, spec. nov. Plate v., fig. 3. 



Shell turriculate, ending in a large sub-globose pullus with the 

 tip laterally immersed. "Whorls seven, excluding pullus, nearly 

 flat, suture impressed ; ornamented with numerous straight, 

 slender, sub-acute transverse ribs closely and neatly striate in be- 

 tween, and crossed by fine, somewhat inequi-distant and unequal 

 spiral threads (about 15 on penultimate whorls). Last whorl 

 ovate-oblong ; abruptly attenuated to a long beak, which is en- 

 circled by thick ribs, the posterior one subgranose. The posterior 

 half of the whorl is slenderly costated and spirally lined, and is 

 iDounded anteriorly by a narrow belt devoid of spiral threads, and 

 defined above and below by a slight angulation. 



Aperture narrow-ovate, prolonged into a long beak, a little 

 efiuse anteriorly and slightly reverted ; outer lip thin, smooth 

 within ; columella with four plaits. 



Dimensions. — Length, 16 ; breadth, 5 ; leng-th of aperture, 7. 



Locality. — Lower beds at Muddy Creek. 



13. Mitra euglypha, spec. 7iov. Plate v., fig. 13. 



Shell broadly turriculate, ending in a subcylindric pullus of two 

 and a half smooth turns. Whorls six, excluding pullus, convex, 

 slightly depressed over the posterior suture ; ornamented with 

 numerous thick transverse ribs, which are crossed by stout spiral 

 threads, about six on penultimate whorl, producing nodulations 

 more or less distinct on the costee. 



Last whorl oblong-ovate, abruptly attenuated to a short stout 

 beak, ornamented with slightly sigmoid cost??, which are more or 

 less nodulated by the intersection of broader spiral lir^e. 



Aperture oblong-ovate, obtusely-angular behind ; outer lip thin, 

 lirate within ; columella with four stout approximate plaits, 



Dimensions. — Length, 15 ; breadth, 5*5; length of aperture, 7. 



Locality. — Gippsland ( TI". H. Gregson I). 



14. Mitra exilis, spec. nov. Plate viii., fig. 5. 

 Shell small, slender, turriculate, ending in a relatively large 

 mamillate pullus of two smooth turns. The other whorls four, 

 convex, with a very narrow oblique slope to the posterior suture, 



