108 



■ elevated, four on the last whorl, obliquely continuous from 

 whorl to whorl with an intermediate one on eaeh of the fol- 

 lowing whorls. 



Aperture oval, extending into a broad, open, nearly straight, 

 slight]}^ recurved canal, which is about as long as the aperture; 

 margin of outer lip crenulated. 



Length, 10 ; breadth, 5 ; length of aperture and canal, 6. 



Locality — Tipper beds at Muddy Creek {J. Bennant /) 



28. Murex alveolatus, 8j)ec. nov. Plate iii., fig. 12. 



Shell fusiform, spire moderately high of gradated whorls, 

 terminating in a small blunt mamillate apex consisting of one 

 and a half smooth whorls. 



Whorls five and a half ; those of the spire, excepting the 

 apical ones, subquadrate, excavated at the suture. Varices 

 squamose, narrow, except the last, which is moderately ex- 

 jDanded, fonr on the last whorl, seven on the next two whorls. 



The ornament consists of equidistant lirse. Tessellated by 

 distant laminae, squamosely elevated at the intersections. On 

 the last whorl there are two lir?e on the posterior slope, thence 

 to the base six stouter ones, with intervening threads. 



Aperture oval, lirate within, terminating in a short, re- 

 curved open canal. 



Length, 8*5 ; breadth, 4"5 ; length of aperture and canal, 5. 



Localitij. — Lower beds at Muddy Creek. 



This resembles a diminutive M. irregularis ; but apart from 

 the difference in the number of varices, the canal is short and 

 the transverse ornament more regular and closer. From young 

 examples of M. irregularis it differs by its narrow lanceolate 

 outline, short canal, smaller apex, and by its cancellated orna- 

 ment. 



29. Murex tridentatus, spec, nov. Plate ii., fig. 2. 



Shell ovate of five and a half whorls, with a mamillate apex 

 of one and a half small smooth whorls. Spire whorls ventricose, 

 shouldered ; truncated on the periphery by two stout, almost 

 contiguous lirae. 



Last whorl convex, ornamented w^ith rounded, depressed, 

 spiral lirse, of which there are about six on the posterior slope, 

 four stouter ones on the angulation, and ten on the basal area ; 

 it has five varices, and is transversely striated with lamellag of 

 growth. 



Varices squamosely laminar, obsoletely nodulous, five on the 

 last whorl, and eight on the penultimate whorl. 



Aperture rotund ; outer lip thickened, with three stout 

 tubercles within ; canal very short, sinistrally curved. 



