[ 4*4 ] 
exadtly like a Sertularia, fo that I do not know if it 
would not be a good definition to one well acquainted 
with that tribe to fay, a Coralline is a Sertularia co- 
vered with a (tony or calcareous cruft ; if the mouths 
fhould happen to be very fmall, their number may 
make up that deficiency. We fee in the greateft 
number of Corallines their furface full of holes ; we 
law the fame in Efcharas and Milleporas thirty years 
ago ; fince that time magnifying glafles have been 
improved, fo as to fhew us, that they are all orifices, 
for polype-like fuckers; why fhould not we now 
admit that glafies may be ftill more improved, fo 
as even to make us able to fee what may be the 
intention and ufe of thefe minute orifices, which 
according to all rules of reafoning, we muft 
fuppofe to approach in nature to them they are moft 
alike. From this extreme minutenefs then of the 
pores of thefe Millepora, confelfed to be zoophytes, 
as well as thofe of Corallina officinalis as before 
mentioned, it is no great matter of furprize, that 
Dodfor Juffieu could not perceive any animal life in 
the Corallines, nor Dottor Schlofter in the Millepora 
calcarea. As thefe experiments ought to be attended 
with many convenient coinciding circumftances that 
do not often happen to perfons who only go to the 
lea- fide, perhaps for a few days, or hours, fo that 
it is unreafonable to conclude, becaufe they have been 
unfuccefsful, that more accurate obfervers may not 
be more fortunate at another time. 
I believe I fball be juftified in this, by many eliays 
. fnat haye been made, by perlbns of judgment, to 
obferve the’ polype-like fuckers in many, even of the 
Sertularia?, which they have feveral times attempted 
in 
2 
