[ 288 ] 
An Explanation of the Plates. 
Plate X. 
A Is an Irregular pieccrof the crumb of bread. fponge, 
found at. Pagham on the fea-coaft of Suflex ; 
reprefent the papilltei through which the 
- ; fponge receives and difcharges the water ; this, 
when recent, is of. 'a fine orange colour. 
Fig. B is the branched Englifh fponge j at bb^ along 
the edges, and on the furface of the branches, 
are rovvs of fmall papillary holes, through which 
^ the animal receives -its hourilhment. 
. , 
Fig.-C reprefents the downy branched Englifh Iponge 
found on the Sufiex coaft ; this is covered over 
with a fine down fo clofe, that it hides the 
many fmall holes that are on its furface. 
Fig. D; and E, the perpendicular and horizontal 
fedlions of the common officinal fponge. 
Plate XI. 
G Is the cocks-comb fponge, taken off the rocks at 
Haffings in Suffex, and viewed while alive in 
. ffa-water. The other fponges, reprefented here, 
are introduced to fhew the variety of forms 
thefe animals appear under in different parts of 
the world. 
> . 
Fig.F is a branched tuberculated fponge from Cape 
Coaft Caftle in Africa. Fig. f reprefents the 
appearance of the tubercles in their dried ftate, 
when 
