DESCRIPTION. 
177 
At any rate it constitutes one more link in the 
great chain of nature, that which connects Testacea 
with Zoophyta. 
Fig. 2. Trochus bifasciatus. 
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. Helix gibherula. 
Shell conical, imperforate, gibbous ; aperture 
toothed, compressed. 
Nondescript. 
Specimen reddish white, with a pale brown cloud 
and mark on the columellar side, and two brown 
bands upon the base ; aperture white, with seven 
teeth, two nearest the exterior margin bent ; outer 
lip margined, acute ; — whoids six, smooth. 
Inhabits Pernambuco. 
N 
