142 Scientific Intelligence. 
tilages are deeper. As the animal advances in age, however, the 
frontals would appear to grow forw and force apart the na- 
sals, which apparently do not Increase, or ev in size, 
and sooner or later are fused with the frontals! This strange out- 
growth of the frontal bones has been verified on four adults, and 
eee panied the natural suggestion, that it was a monstrous indi- 
ual feature, is rendered improbable. The first premolars of 
the Guatemalan form, in comparison with those of #. Bairdii, are 
Wi s 
while the inner face of the posterior half bulges abruptly inward ; 
in the lower jaw, they are also narrower, and the anterior cusp is 
separated by a vertical groove o “pre inner face of the tooth. 
the specimens were o eee y Capt. John M. Dow, who 
“was told by the party who gave [him] ve skulls that the young 
are not marked on the body with longitudinal Baht — stripes, 
like # Bairdii,” and he believes that “this w: r 
evidently constant in the young of the species found in Guatema- 
la.” This, if confirmed by Capt. Dow himself from autopsy, 
would furnish a remarkable exception in the family ; but without 
attaching undue agar to the statement, the differences 
already enumerated seem anne By sabes its specific rank, 
and I shall Sache it at length under the name Hlasmognathus 
Dowii, I may add that Prof. Baird. rien the first has insisted on 
n 
gg ok to the Theory of Natural Selection: A Series 
aly AuFRED RussELL Watwace, author of the Malay 
ill 
e’s work will be read with interest by all who 
would somsibiak ‘hommes with the arguments and y Be pepo 
oR the hypothesis of Natural Selection rests, and also for its 
inal and curious observations on the geographical distribution 
habits of some animals. The author differs widely on some 
points from Darwin and Huxley. He has a chapter, evincing pro- 
found and earnest ot hate, on the Limits of Natural Selection as 
ae to Man, in which he shows that Man could not have been 
vancing, spiritual being, the ultimate aim of all 
ence; of his will, as not a product of nasurea cbaaduiete eee 
