MOLLUSCA OF LOWER CANADA. 



113 



are imperforate, or very nearly so. The species is easily known 

 ■ by its large and wide body-whorl, which is decidedly angulated 

 towards the sutures. The spire varies in length, but is seldom 

 more than half as high as the last volution. 



Figure 12. 



Planorbis macrostomus, nobis. 



Shell in many points closely resembling Planorbis lentus, Say : 

 of which it may perhaps be only a variety. It is much larger, 

 higher, and has deeper costae ; its lines of growth are very promi- 

 nently marked : the upper angle of the whorls as shown in the 

 mouth, is more prominent. Lip vvidely expanded, and reflected, 

 covered with a white enamel. In this latter character it differs 

 from all the North American species of Planorbis. It is a species 

 nearly allied to Planorbis lentus and P. trivolvis; but apparently 

 distinct from both. 



Art. X. — On the Antiquity of Man; a Review of 1 LyzlV and 

 ' Wilson? * 



Questions of human origins have always been popular, and. have 

 been agitated in all sorts of forms. Next to the dread question 

 of the unknown future, the long buried past is one of the most 

 attractive subjects of inquiry ; and while the faith of the Christian 

 rests for both on the statements ctf Holy Scripture, the imagination 

 of the poetical or the superstitious, and the reason of the philosopher 

 or the sceptic have found ample scope for exercise. In our day, 

 geological investigation on the one hand, and antiquarian and 



* " The Geological Evidences ot the Antiquity of Man with remarks on theories of 

 the origin of species by variation," by Sir Charles Lyeli., F.R.S., 8ro. pp. 520,. 

 illustrated. London, John Murray. Montreal, Daween, Bros. 



" Pre-historic Man. — Researches into the origin of Civilization in the Old and New 

 World," by Daniel Wilson, LL.D., Prof, of History in University College,- 

 Toronto, 2 vols. 8vo, pp. 488-499, illustrated. London, MacMillan & Co. Montreal, 

 Dawson, Bros. 



Can. Nat. 



Vol. VIII. 



