121 



7. Triton intercostalis, spec. nov. PI. ix., fig. 5. 



Shell elongate-ovate; whorls, five (apex unknown), the 

 •earlier ones, convex, with five principal granulose lirse, finely 

 reticulated in the furrows ; the anterior ones bicarinated and 

 tuberculated and reticulated all over. 



Last whorl roundly truncated medially, and abruptly 

 attenuated into a stout, long, twisted beak ; the whole surface 

 ^closely reticulated by transverse raised lines and stronger 

 spiral lirae. The medial part is encircled with three equi- 

 distant, tuberculated keels ; the posterior one is the stoutest, 

 a.nd the anterior one, which is the weakest, is in an alignment 

 with the posterior angle of the aperture. The tubercles of 

 the two posterior ones are confluent, and are continued back- 

 ward as a narrow arched costulation to the suture ; the inter- 

 costal space is occupied by two similar costulations, ending 

 anteriorly at a strong subnodulated thread which bisects the 

 posterior slope. The basal part of the last whorl has two 

 equi-distant, strong, granular liree. 



Varices narrow, rather broadly expanded, crenulated on the 

 margin, at three-fifths of a whorl. The inter-variceal nodula- 

 tions are seven in number on the two posterior rows, and ten 

 ■on the anterior row. 



Length, 43 ; breadth, 28 ; length of aperture, 17 ; of canal, 

 10. 



Locality. — Lower beds at Muddy Creek {J. Dennant !) 



This species is very distinct through its obliquely costated 

 posterior slope and the unusually narrow intervariceal areas. 



8. Triton annectans, spec. nov. PI. v., fig. 3. 



Shell resembling T. cyplius with the whorls medially sub- 

 angular, spire less distorted and higher, last whorl subquad- 

 rate, encircled with two rows of nodulations. The nodulations 

 on the posterior angulation are large, seven on each inter- 

 variceal space, but diminishing in size anteriorly ; the eleven 

 nodulations on the anterior angulation are small, though con- 

 spicuous, equal sized and regular disposed. Posterior slope of 

 last whorl with about twelve irregular encircling lirse, the 

 larger ones more or less granulose. 



Length, 38 ; breadth, 21 ; length of aperture, 14i"5 : of canal, 

 9-5. 



Locality. — Lower beds at Muddy Creek. 



9. Triton armatus, spec. nov. Plate v., fig. 3. 

 Ovate-elongate; whorls five and a half (apex not known), 



carinated and acutely nodulose, equally spirally lirate ; lirgs 

 thin, depressed, about ten on the posterior slope and five on the 

 front of the penultimate whorl. Varices broad, high, and 

 *spinosely nodulate on the carination. 



