226 AMPHITRITE. 



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 branchiae 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 antennulae 

 seemed to be nearly an eighth of an inch in length. 



Three weeks subsequent to mutilation, the renovated branchiae 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 branchiae 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 branchiae, expanded about an inch and a half ; the longest 

 of the branchiae, extending above ten lines, were of fine green colour, 

 with seven spots on the ribs, and the antennulae 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. 



