61 



ton's shell is not a Phasianella, for it is described as having no oper- 

 culum; and the similarity of the shell leaves no doubt, when joined to 

 the parasitic habits of the animal, that it is one of the congeners of 

 Stilifer Astexicola : \, therefore, propose to name it Stilifer Turtoni. 



Mr. Sowerby possesses a third species, which, although its habits 

 are unknown, may be referred to this genus with the name of 



Stilifkr subulatus. Stil. testd turritd, suhulatd, attenuatd, dia- 

 phand, anfractibus numerosis, suhrotundatis ; apice longlssimo : 

 long. -rV) lo.t. xV poll. 

 Hub. in Indis Occidentalibus. 



This shell is so beautifully transparent that the columella in fine 

 specimens can be as distinctly seen as if there were no intervening 

 medium. The long apex, which consists of many close-set whorls, 

 is generally out of the perpendicular. — W. J. B. 



Mr. Owen, to whom Mr. Broderip acknowledged himself indebted 

 for the anatomical particulars which he had recorded of Stilifer As- 

 iericola, subsequently exhibited a series of drawings of the animal 

 and of its various parts, so far as he had been enabled to observe them 

 in the specimens brought home by Mr. Cuming. He also read a more 

 detailed description of the peculiarities remarked by him during the 

 dissection of the individuals which had been entrusted to him for 

 that purpose. 



