226 AMPHITRITHE. 
sides of others partially ciliated ; and a large vacuity in front admitted in- 
spection of the four lobes, which had made corresponding advances, to- 
gether with the parts near the mouth. Whether these had been actually 
lost, or only injured, could not be ascertained. They are always present 
amidst the perfect organs, and very difficult to be observed at any time, 
or under any circumstances. Thus it is necessary to be reserved regard- 
ing either form or number. But the best exposure of the living parts is 
during regeneration from such extraordinary mutilations as I am now 
endeavouring to describe, especially as they are neither lethal, nor suffi- 
cient to restrain the animal from attempting, on the first opportunity, to 
repair its dwelling. 
At this time the largest of the ciliated branchis were adorned by 
four beautiful orange spots, those shorter had fewer ; the shortest were 
not of such dimensions as to allow of any. The regenerating antennulze 
seemed to be nearly an eighth of an inch in length. 
Three weeks subsequent to mutilation, the renovated branchize form- 
ed a regular funnel an inch wide; but the side next the trowels was 
lower than the rest. Their number and size had augmented ; cilia cloth- 
ed more of the ribs, for the evolution of those subordinate organs ad- 
vances upwards, the lowest cilia originating first. 
In another week the branchiz amounted to sixty or more ; the 
cilia approached within a line and a half of the tips of the largest ribs, and 
six orange spots were on the latter. Let us remember that the number 
of such spots is multiplied by the prolongation of the branchial feather. 
Thirty-four days after mutilation, the animal had become bold and 
vigorous ; the progress of reproduction apparently enabled it to resume 
its natural functions so long interrupted. Now the funnel, composed of 
about seventy branchie, expanded about an inch and a half; the longest 
of the branchix, extending above ten lines, were of fine green colour, 
with seven spots on the ribs, and the antennulz rose nearly three lines. 
At this time also, the revolution of the renovated plume commenced 
on the water being rendered turbid, and the speedy accumulation of small 
muddy collections within it, proved the restoration of its organic fa- 
culties. 
