99 



•at the intersections, produced by the intercrossing of trans- 

 verse and from four to six spiral threads — there is one spiral 

 thread on the posterior slope. On the anterior whorls the 

 spiral lir?e increase in number, and are of unequal dimensions, 

 whilst the transverse threads become indistinct, or are reduced 

 ijO striae. On the penultimate whorl there are ten unequal 

 lirse in front of the angulation, which pass over the varices, 

 producing crenations on their margins ; whilst on the posterior 

 slope there are five very slender threads. Aperture ovate, 

 peristome continuous ; outer lip thin, smooth within ; canal 

 longer than the aperture, contorted and slightly reverted. 



Length, 30 ; breadth, 11 ; length of aperture and canal, 17. 



Locality. — Lower beds at Muddy Creek. 



10. Murex Adelaidensis, sine. nov. Plate ii., fig. 4. 



Shell elongate-fusiform; whorls nine, including two small, 

 rounded, smooth, turbinated apical ones ; the rest of the spire 

 whorls subquadrate. 



Varices on the three anterior whorls more or less regular, 

 three to each whorl, compressed foliar, each bearing at the 

 posterior shoulder of the whorl a short, broad, erect spine. 

 •On the posterior whorls the varices are eight to each whorl, 

 foliar and fimbriated, graduating posteriorly into vaulted 

 ■scales. 



"Whorls of the spire, excluding the apical ones, ornamented 

 on the medial portion with three strong spiral liras, or two 

 strong ones with one or two smaller intervening ones ; the 

 posterior slope with one, two, or three slender spiral threads ; 

 and there are usually two next to the anterior suture. The 

 whole surface finely striated in a spiral direction, and crossed 

 by rather distant imbricating lamellae of growth. 



Last whorl quadrately-convex, with three or four spiral 

 threads on the depressed area next the suture, the anterior 

 portion with about 15 strong equidistant spiral liras alternating 

 with slender ones, crossed by subdistant transverse threads less 

 prominent than the principal lir?e. 



Aperture ovately-oblong ; inner lip crenulated on the margin 

 and lirate within ; canal not exceeding in length that of the 

 aperture, open, and sinistrally curved. 



Length, 20 ; breadth, 9 ; length of canal and aperture, 11. 



Localities. — Adelaide bore ; and " Turritella clays," Aldinga. 



11. Murex basicinctus, spec. nov. Plate ii., fig. 9. 

 Shell elongate, fusiform, with a high gradated spire, termi- 

 nating in a small blunt mamillate apex. Whorls eight, includ- 

 ing two smooth apical ones ; the next two are rounded, but 



