Ill 



Last whorl convex, gradually attenuated to tlie beak, with 

 .•about 12 equidistant and equal encircling lirae, traversed by 

 fimbriated lamellcT;. 



Aperture varicosely dilated ; minutely tuberculated within 

 the outer lip ; canal shorter than the aperture. 



Length, 7; breadth, 3 ; length o£ aperture and canal, 3"75. 



Locality. — Adelaide bore. 



Among living species this little fossil has considerable 

 ;analogy with the European T. Barvicensis much more than to 

 ^ny Australasian species. 



5. Trophon hypsellus, spec. nov. PI. ii. fig. 1. 



Shell elongate-ovate with a high gradated spire terminating 

 in an elongate apex consisting of four smooth tumid whorls, 

 regularly but rapidly diminishing in size, with a minute papil- 

 lary extremity ; whorls eight, those of the spire excluding the 

 muclear ones, convexly angular, bicarinate anteriorly. Last 

 whorl veutricose with a narrow sloping area posteriorly, 

 abruptly contracted into a short beak. 



The spiral ornament consists on the spire whorls of two 

 lirse ; on the last whorl of one slender lira on the posterior 

 .slope, four stout lirae on the median portion, and four on the 

 base. 



The trausverse ornament consists of about 16 lamelliform 

 •costse to each whorl, which are raised into vaulted scales on the 

 lirse, interstitial spaces between the costso coincidently striated. 

 The outer lip is varicosely thickened and expanded, and there 

 is usually a second variceal development near to the columella 

 margin and rarely a third on the penultimate whorl. 



Aperture rhomboid, entire ; outer lip varicosely thickened, 

 £ve-tuberculated within. Canal very short and stout, open 

 much curved sinistrally and reverted. 



Length, 6 ; breadth, 3"5 ; length of canal and aperture, 3. 



Localities. — Turritella clays, Aldinga Bay ; and Adelaide 

 bore (many examples). 



In this species an approach is made to the genus Triton, 

 -through its two or three varices ; but in its regular spire and 

 general resemblance to the cohabitant species of Trophon, it 

 may be better placed congenerically therewith. Its long sub- 

 cylindrical apex is a striking specific mark of distinction, apart 

 from the peculiarity of its variceal development. 



6. Trophon monotropis, spec. nov. Plate iii., fig. 4. 

 Shell rather thin, elongate conical, with a high spire ending 

 in a blunt rounded apex of two smooth whorls. Whorls four 

 •exclusive of the apical ones, convex or obscurely subquadrate ; 

 the last slightly tumid, with a rounded contracted base pro- 

 duced into a narrow sinistrally bent canal. 



