THE 
PHOSPHORIC PYROSOMA. 
Generic Character. 
« 
Body nayant, oblong, tubular, gelatinous, open 
at one extremity. 
Specific Character, &c. 
H 
Greenish-hyaline, papillose PYROSOMA, with 
the mouth crenated within. 
PYROSOMA. 
Peron annales du JMus. Nat. d Hist. Nat. 
No. 24 . p. 437. 
This elegant marine animal seems to have been 
first distinctly described by Mons. Peron, in the work 
entitled “ Annales du Museum National d'Histoh'e 
Naturelle." It is a native of the equatorial parts 
of the Atlantic ocean, where it is sometimes seen in 
vast numbers, both floating on the surface, and 
swimming at considerable distances beneath. W^hen 
in a state of perfect inaction or repose, it is usually 
