16 ON SOME TERTIARY FOSSILS, 



labrimi varicose, with an acute margin, dentate inside ; lip defined 

 and slightly renexed ; canal rather long, open, oblique, and 

 recurved. The nucleus is smooth, rather large with the apex 

 disjoined and curiously twisted up into an erect position. 



This fossil had been figured by me when I received from Prof. 

 Tate the information that he had already named it after me in a 

 MS. account of the Murray fossils. In publishing my notes 

 under his name, I beg to thank him at the same time for his 

 courtesy, and to apologize for having anticipated his notes. 



Trophon sxjccinctus. PI. 4, fig. 6, 6a. 

 Testa elongato-turbinuta,te>iuiuscula; anfr. 5|-, (iiucleo \\incluso) 

 subglobosis, supevne subplanatis, undique cequaliter, distanter, acute 

 carinatis, et conspicue, undulose striatis, lineis, incrementi ; carinis 

 rugulosis, subtus concavis, elevatis, supevne 3 parum majoribus, 

 prope apicem quasi cancellatis, interstitiis profundis, rotundatis ; 

 iiucleo tumido, lazvi ; apertura lata, ovata, labro tenui, crebre 

 undulato, intus sulcata ; labio dejinito, polito, canali obliquo, lungo, 

 recur vo ; sutura pro/unde canaliculata. Long. 24, lat. 16, long 

 spir. 8, long, canal 7. 



This elegant species is turbinate in shape and rather thin. It 

 is covered all over with equal, sharp, and high keels whieii are 

 rendered rather rugged at the edge from the undulose lines of 

 growth which cover the shell longitudinally. Three of these 

 keels are a little larger and more distinct at the upper part of 

 the whorl, which is a little flat towards the suture. The canal is 

 rather long, oblique and recurved, the outer lip is thin and closely 

 undulate, from the keels which are hollow underneath. The 

 throat is regularly grooved and the nucleus tumid and smooth. 

 The habit and form of this shell brings it near to Purpura, but 

 I think it finds its best place in the genus wherein I have placed 

 it. Prof. Tate informs mo that Ids largest specimen is 1J inch 

 long and f inch wide. 



