1 8S SPECIFIC 



What then is it to be denominated ? This will 

 liardly be answered quite satisfactorily till the in- 

 habitant be known, and till it be observed whether 

 he have any organs with which to build this coral- 

 like edifice. That it is however entirely the work 

 of a molluscous worm, upon the whole appears 

 most consonant with reason. If this be the case, 

 it must, in the Linnsean system, be a Turbo, and 

 it is proposed to call it specifically madreporoides. 



At any rate it constitutes one more link in the 

 great chain of nature, that which connects Testacea 

 with Zoophyta. 



Fig. 2. Trochus lifasciatus. 



Shell thin, pellucid, pyramidal, imperforate, 

 whorls acutely carinate. 



Nondescript, 



Specimen white with two purplish brown trans- 

 verse bands and a dark brown apex. 



Inhabits Pernambuco. 



Fig. 3. Heli'k gihberula. 

 Shell conical, imperforate_, gibbous; aperture 

 toothed, compressed. 

 Nondescript, 



