9 
® nc e found the P. Catherina growing on the bottom of a 
l^sel j n g rea t abundance, after she had Iain at Fowey 
‘■“'hour for a few months. The finest specimens of the 
Qeniculata. I have ever seen, were on the dorsal and 
^ ln dal (] ns 0 f t[ ie Picked dog-fish ( Sq. Acanthias.) These 
' l( niany other examples, tend to prove that these creatures 
re °f quick growth. 
( ^ he greatest number of the species of this order appear 
0 he annual; very few, apparently surviving to the second 
^ar. Those growing near tide marks, cannot well be other- 
ls ®, for they soon become so completely encrusted with 
"verves and sponges, that the apertures of many of the 
Us are dose^ an( ] most of the others partially so, thus 
^closing the polype and preventing access to the water. 
JTWle this the Sea Oak and Sea Threads, tho former of 
l|c h is frequently infested with Entomastraca, in different 
^j’ges of devclopement, grow on the fronds of sea weed, 
j- 1|c h are liable to be washed off by every storm. This is 
l ( e fiuently the case, when the waves of the Atlantic roll 
c ay ily and furiously in, uprooting every thing in their 
ViY* 6 ’ y pt a * ter a few weeks of fine weather, specimens 
he frequently found, even in fructification. The Sea 
^.^ads, so common on all our shores, are to be found in the 
s| Dt er and spring, only in sheltered situations and beneath 
^ nes . but in the summer and autumn, on most of the weeds 
lari'* 1 ' t)w water mark, especially the Laminaria digitata. The 
p 0 'f tT hind appear to he of a similar nature; tho Serlularia 
K J'™ias, rugasa, abietina, Plvmularia falcata, frntescens, 
Ui Slala ’ *c., are more abundant about summer and autumn 
t) a t any other parts of the year, though this probably 
tli> nc ' s 0,1 l ^ e weather; for if the winter and spring be fine 
t^ymay be procured as good as at any other season. In 
c 0 SUlr| mer and autumn the Pinna Ingens is almost always 
j t . ere d with different kinds of Coralline, while in autumn 
s c ommonly bare. 
polypidom increases in age, the horny sheath of 
Hrnj branc hes and pinnae gets firmer and more condensed ; 
lo\ v ^ lea Thus it is that in some species the 
branches are always wanting; which is the case 
So /• Bottle brush Coralline, T/iuiaria thuja, and less 
c)g t 1 a most of the other branched species. This does not 
tile. on violence of the waves, though that no doubt 
tal^ S a S rR at deal, but is rather the result of an action 
th ro ^ place in the animal itself. In a branch about to he 
c 6Us »V ff > ^ le polypes first, get inactive and retire to their 
’’“Wain ce ntral pulps get paler, more transparent, and 
at w i . by <lown as far as where the branch joins the stem ; 
ai ch point there is a well defined line of demarcation 
A * 
