or NEW SOUTH ^ALBS. 233 



interstices are like little threads, while below the keel they are 

 flat. The mouth is round, the labrum thin, base striate, concave, 

 periphery laraellose, produced, canal long, slender, recurved, 

 suture broad, flat, margined, nucleus of three whorls, smooth. 



We have no Cerithmm at all like this in our Australian Seas, 

 and I know of no fossil form near it. 



Triforis wilkinsoni. pi. 20, fig. 9. 



T. elongata, pyramidata, turrita, temu, parva, polita ; anfr. 12, 

 declivihus, convexis, 4 lineis granulorum cinctis ; sutura canali- 

 culafa ; emhryon. 3 Icevibus, rotundaiis, apertura quadrata, hasi 

 planata, unisulcata, radiatim striata, canali hrevi, recurvo. Alt. 7|, 

 lat. 2. 



Shell elongate, pyramidal, turretted, thin, small, polished, with 

 12 sloping convex whorls, girdled with four lines of granules, 

 suture slightly canaliculate. Embryonal whorls 3, smooth and 

 rounded, aperture quadrate, base flattened, with one groove and. 

 radiately striate. Canal short, recurved. 



This species is a good deal like Australian and Tasmanian 

 forms, except that it is much more turretted and is more 

 granular, and yet the granules not projecting. I have dedicated 

 it to Mr. C. S. Wilkinson, F.G.S., Government geologist for 

 N. S. Wales, who surveyed much of the miocene district near 

 Cape Otway, and published valuable reports on the subject. 



Triforis sulcata. PL 20, fig, 12. 



T. t. elongato-pyramidata, turritissima, tenui, nitente, anfr. 24, 

 ploMatis, regidariter costatis, ad suturam uno funiculo spiraliter 

 insignitis et duobus sulcis inoequalibus, spiralihus cinctis, costis latis, 

 parum elevatis ; apertura quadrata, labro tenui; hasi planata, un- 

 dulose striata ; nucleo (2 anf.) Icevi, inconspicuo. Long. 33 1, 

 lat. 5. 



This very beautiful species of Triforis is very distinct from 

 any living or fossil. It is very elegantly pyramidal, with 

 numerous whorls, which are rather flat and ornamented with 

 numerous inconspicuous depressed broad ribs. At the suture there 

 is a rounded spiral line, and, in addition, there are two spiral 



