THE HUMAN SPECTES. 191 



them, may have possessed to a still greater extent; the ques- 

 tion would assume a paramount interest — one, perhaps, more 

 indicative of a distinct origin than any before noticed. 



Dr. Tschudi, describing this form, in his paper on the ancient 

 Peruvians, remarks on the flattened occiput of the cranium, and 

 observes, " that there is found, in children, a bone between the 

 two parietals, below the lambdoidal suture, separating the latter 

 from the inferior margin of the squamous part of the afterhcad ; 

 this bone is of a triangular shape, the upper a^igle between the 

 ossa parietalia, and its horizontal diameter being twice that of 

 the vertical. This bone coalesces at very different periods with 

 the occipital bones, sometimes not till after six or seven years. 

 In one child of the last mentioned age, having a very flat occi- 

 put, the line of separation was marked by a most perfect suture 

 from the squamous part, and was four inches in breadth by two 

 in height." In remembrance of the nation where this confor- 

 mation is alone found, the learned doctor denominated this bone 

 Os. Ihccb ; and he further remarks, that it corresponds to the 

 Os. interparletalis of Rodentia and Marsupiata. 



These characters had been previously noticed by Mr. Frank- 

 lin Bellamy, in a paper read by him to the Naturalist's Society 

 of Devon and Cornwall, together with remarks which do not 

 occur in Dr. Tschudi's communication, and are, nevertheless, 

 of considerable importance. Comparing the cranium of two 

 Titicaca children with skulls of Europeans of similar age, he 

 found the frontal bone, the parietal and occipital bones, of the 

 former, all considerably larger than the latter, elongating the 

 head posteriorly, and throwing back the whole skull. This 

 peculiarity was greatest in the cranium of an infant, not many 

 days old, and lessening with growth in the older head ; there- 

 fore it was not absolutely the result of bandages ; because the 

 natural effect of these would tend more to increase than to 

 decrease this result. From the small flattened forehead there 

 could not be much space for the anterior lobes of the brain. 

 The orbits were exceeding strong, with a somewhat elevated 



