440 , Scientific Intelligence. 
arenaceous strata of the Wealden. It is four and a half feet in 
length, and the circumference of its distal extremity is thirty-two inches ! 
gigantic Iguanodon; the name of Pelorosaurus (from emg, mon- 
ster) is therefore proposed for the genus, with the specific term Compe 
beari, in honor of the paleontological labors of the present Dean of — 
Llandaff, the Rev. W. D. Conybeare. 
o bones have been found in such contiguity with this humerus, as 
to ada: it certain that they belonged to the same gigantic reptile ; but 
together with some distal caudals of the same type, are figure 
described by the author. 
ertain femora and other bones from the oolite of Oxfordahivas 
; ee 
possessing characters more alliéd to those of the Pelo 
some unknown — gee: than to the pata wit 
they have been confo d. 
As to the magnitu Pm of the aa to which ‘ee juivorde bale 
Dr. Mantell, — disclaiming the idea of atriving at any certain c 
clusions from a's ingle — Stated that ina Gavial eighteen feet lo 
the humerus is one foot in length; i. e. one-eighteenth part of 
length of the animal, frei the end of the muzzle to the tip of the tail. _ 
According to these Sdincasopementa the Pelorosaurus would be eighty- 
one feet long, and its body twenty feet in circumference. Even if we 
assumed the length and probable number of thé vertebra as the scale, 
although we should have a reptile of relatively abbreviated propos 
yet in “this ¢ case, the original vonroai would surpass in magnitude the 
most collossal of reptilian for 
In conclusion, Dr. Mantell ociinial on the probable physical conde z 
tions of the countries inhabited by the terrestrial reptiles of the secon- 
dary ages of geology. The highly organized land saurians appear to 
have occupied the same position in those soars te pe as the large 
mammalia in those of modern times. he trees and plants whose re- 
mains are associated with the fossil bones, sahtolk by their close affin- 
ity to living types, that the islands or continents on which they aie 
o- 
n 
clouded a as those of our tropical climes. There are therefor no | 
ion can only have originated from a partial view of all the phenomena 
which these problems embrace ; for there is as great a discrepancy be- 
