external CIRCUMSTANCES.
{"newspaper_name": "New-York daily tribune.", "edition": "01", "page": "p1", "byline": ""}
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C In pursuing the progress of the development OF
beth plants and animals upon the globe we have
seen an advance lc both cases, along the line lead
ing 10 the higher terms OF organization Amongst
plants we have hSsi sea-weedS, afterwards land
plants: and amongst these The simpler Cellular and
crvp;ogamic) before the more complex. IN the
department OF zoology. we see zooPhvtes, rad!ata,
moliusca ar,icalat,, eXis,lrs for ages before there
were any hlsher forms. The first step forward
gives fishes the humbcsi class OF the vertebrate :
and, moreover. the earliest fishes partake OF ths
character Of The next lowest sub.kingdonl, the
ar,iculata. Afterwards come land animals, OF
which the his: are reptiles. universally allowed 20
be The Tyne next IN advance from isAeS and 10 be
connected with the St bv The links Of an insenSIble
srada,ion From reptiles we advance 10 birds,
and thence 10 mnmnlnlia, which are commenced
bv Earsuplalia ackuowleGseCiy low forms IN their
class That there is thus progress CT some KIND,
the most superficial glance al The geological history
Is sufficient TO convince Us. indeed the doctrine
OF the sratauon OF ANNA! terms mas received yea re-
markabIe support from the discoveries OF tins SCI
snce, as several types ioymerly wautlns 10 com,
pl,,ion of The series have been found In iossi!
state"


One of the mos, interesting facts connected with
organic development, is the discovery OF modern
Psychologists that each animal passes through a
series OF changes resembling the punsrsrt forms
OF the various orders OF sEimalS inferior TO II in
the scale.


Thus. for instance, an insect, standing a, the
head oil The ailculated animals. is, in the arva
| state, true Rnnei!d, worm, the annehGa being
the lowest IN the SAME class. The embryo OF a
crab resembles the perfect animal of the inferior
order myfspoda. and passes through all the ionn.
OF transition which eharac,esize the immediate
,r5es OF crusiacea The frog for some time after
It's birth, Is tSh with external gils and other or
gans fitting !, for an aquatic hfe, all of which are
changed as II advances 10 maturity, and becomes a


land animal The mammifer only passes through
still more stages according It's higher place in
the scale. Nor is man himself exempt from this
law. His hrs, form is that which IL permansnt in