119 



the space, whilst the anterior one-third is encircled with a 

 series of small bifid granulations. 



The ornament consists of flexuous slender spiral threads, 

 crossed by close fine striae. The encircling threads are alter- 

 nately large and small, those on the base of the last whorl, 

 and especially towards the marginal varix, are broken up into 

 elongate granules. Aperture rhomboid ; outer lip lirate den- 

 tate within ; inner lip thinly spread over the columella, which 

 shows a strong curved fold at its juQction with the canal. 



Length, 35 ; breadth, 25 ; height of aperture, 14 ; length of 

 canal, 10. 



Localities. — Blue clays at Schnapper Point ; and lower beds 

 at Muddy Creek. 



This remarkable gibbous species has the same general 

 characters of T. textilis, from which it differs in shape, more 

 trochiform spire, shorter canal. 



4. Triton cyphus, spec. nov. Plate v., fig. 11. 



This is another gibbous species, differing from T. gihlus by 

 its subscalar spire- whorls and its stout, broad, crenately-granu- 

 iated, spiral lirsD. On the base of the last whorl the principal 

 lirae are about eight in number, the posterior one of which is a 

 little stronger than the rest, and have two, three, or four 

 slender threads in the interspaces. There is no columella 

 fold as in T. gibhiis. 



Length, 39 ; breadth, 25 ; height of aperture, 16 ; length of 

 canal, 8. 



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

 Schnapper Point. 



5. Triton 'Woodsii, Tate. Plate v., fig. 4 ; Vab. pi. v., fig. 6. 



T. Woochii, Tate, Proc. Lin. Soc, N.S.W., vol. lY., p. 15 ; 

 t. 3, f . 1-2 ; 1879. 



Elongate fusiform, with a much produced conical spire ; 

 apex acute of two and a half whorls, the anterior one angular, 

 the next rounded and very narrow, terminating in an acute 

 curved lateral point. "Whorls six, excluding the apical ones, 

 sharply angulated medially, but rather flatly depressed behind 

 each varix ; keel with six bluntish tubercles between the 

 varices. Varices rather broad, convex axially, without tuber- 

 cles, ornamented as the rest of the surface, situated at about 

 four-fifths of a whorl. 



Last whorl somewhat tumid, biangulated ; the anterior keel 

 with six rounded small tubercles, which become obsolete to- 

 wards the marginal varix. 



Surface ornamented with numerous slender spiral threads, 

 for the most part, equal and equidistant ; cancellated by close, 



