CAMBRIDGE E3SAY3 : HOPKINS' "GEOLOGY. 



1-20 



i^splaccmcnt h h' mriy not fxcf cil, in some cases, a few feet, while in 

 others it may amount to several hundred feet. In the latter case, the 

 faults usually extend for many miles. 



" These faults are intimately associated with large deviations of the 

 strata from horizontality. They are almost invariably parallel to the 

 neighbouring anticlinal and synclinal lines, which themselves observe 

 the same Jaw of paralkUsm. One of the most gratifying results of the 

 labours of the field-geologist consists in this evolving of law and order 

 amidst the apparent irregularity and confusion usually presented to us 

 in the external features of a mountainous district. 



" The complete evidence of the facts which we have now 

 described in broad outline must, of course, be sought in the labours of 

 geological observers. AVhen the geological sense, however, is once 

 awakened, we can scarcely cast our eye on a sca-clitf, a mountain- 

 (-carpmcnt, or even a railway-cutting, without seeing evidence of some 

 uch facts as those above stated." 



The general arrangement of the fossiliferous or stratigraphical portion 

 of the earth's crust is then given, and a concise table of the general 

 arrangement of the animal kingdom. 



The latter we transcribe, as it may prove useful to some of our 

 readers : — 



Sub-kingdom Vertelrata. 



Class Kammalia. 



„ Aves. 



„ Reptilia. 



,, Pisces. 



Sub-kingdom 2IoUmca. 



Class Cephalopoda. 

 Gasteropoda. 

 „ Pteropoda. 



Lamellibranchiata. 

 ,, Pranchiopoda. 

 Tunicata. 



Sub-kingdom Articulaia. 



Class Crustacea. 

 Arachnida. 

 „ Insccta. 

 ,, Anellata. 

 ,, Cirripedia. 



Sub-kingdom Fuidiata. 



Class Padiaria. 

 Poly^Di. 

 Entozoa. 

 Infusoria. 



The first of these sub-kingdoms consists of 



mimals of the highest 



