ANIMAL REPRODUCTIONS. 385 
iefults from thy experiments, which fhall be lis 
mited to thofe direétly flewing from facts. 
The firft, which is evident, refpets the time 
employed by nature in preparing for the repara- 
tion of mutilated members. In the arm poly- © 
pus, and frefh water worms, which may alio be ~ 
multiplied from fe€tiions, reprodu¢tion is imme- 
diate, and in one or two days, during fpring or 
fummer; there are fenfible indications of rege- 
neration. It is very late in newts, on the other 
hand; and only, after an interval of feveral weeks, 
do any fymptoms of renewal appear: thus, in 
the newt, fig: r. it was imperceptible till about 
five weeks after the operation ; and a month was 
required for preparing the reproduction of the 
newt mutilated 12 June. Polypi and frefh was 
ter worms are gelatinous; they neither have 
bones, nor any part that can offify. But it is by 
no mieans the fame with newts; for they are ac- 
tually fmall quadrupeds; and; as quadrupeds, have 
bones covered with mufcles and flefh: All thefe 
parts exift in a gelatinous ftate, previous to their 
appearance. ‘This gelatine; however, unquef- 
tionably oppofes more refiftance to the power 
which effects increment, than is done by that of 
polypi and frefh water worms, for the {truc- 
ture is more complicated. ‘Thus we fhould 
not be aftonifhed at the flow progrefs of evolu- 
tion in large newts; in this cafe, it is‘*even more 
Vou. If. Bb immediate 
