SPONGIA. 
113 
pin-like and 0 t) Spe<des ‘ ® ome of these resemble needles, others are 
The Uvstf 7?f ’ m reSemble vei 7 smaU «*». 
themselves on afl ™ tbose tld,es and offices which present 
Wa ys. Ellis, writbicr 1° I 7 e r SP ° nge ’ haS been inter P reted m various 
the cells occupied bln ' 1 SU hP oses that they were the orifices of 
tt T' l t c1 sti " 
ta 8 edited With SO mud, a to d the °Wer, whose notes M. Fredol 
« tte S po„ g rj, Tr 1 ;.* 838 ^ 6 ““>» 
susceptible of extension and contr ' i ''"' ' tra “r”«“ l . gelutiuous tube, 
> »a»«t “ITS 7”? P”‘w». » » “y »ii 
of v,:, j simple but sufficient . ’ mct P lent polypes, m short, 
s Ponge is a stomach, without a/ 1UZatl0n : The animalcule of the 
s Wt, an animal all stomach ! !! mS ’ Slm l^ e ’ ver J elementary — in 
the m“ I 7 f0 ™ lle *» th 6 ™™ of 
n place of seemg in the sponge a col lectin r ° Edwards > for instance, 
as it were a colony, considers each to 1, * ° T* 6 * beings > for ming 
individual. The innnmerabZ cands bT X f" an 
according to that author, are at once the dtth ® SP ° nge is traveraed > 
mg pores of the zoophyte. The vibrnX •l' 6 ° lgans and hreath- 
renewed aeration of the water reli ef ^ *?* ne ~^ to the 
interior canals of the sponge The ^ * r f pirator y A»id i n the 
constant direction. The water f t !b ^ CWels bave one 
orifices of minute' dime^lf^ff^ ^ ^ herons 
channels in the body of the zoonhvte l ° D 5 ^ traverses 
he root of a plant, in order to constitut^! lik ® 
nhstance; finally, the water makes if. , 16 and mcre ase its 
ccording to this view, the channels ofTlf 6 ^ Sp ° CiaI openin g s - 
cumulative physiology, performing ti ' f f Sp ° nge have a hind of 
respiration. The i£ ****** <* digestion and 
f d mt0 them the substances neeessaryfo f trav6r8e tbem 
strange creatures, rejecting all excrement tllG Uonns1 'ment of these 
tbe walls of these canals present a 
separates the oxygen with which the wHeh 
= - are uou-effiS if 
