THE 
PULMONIC MEDUSA. 
Generic Character. 
Body gelatinous, orbicular, commonly deprefied. 
Month central, beneath. 
Specific Character. 
Hemifpherically-concave MEDUSA with fimbri¬ 
ated border; ftriated beneath ; the body or 
item furnifhed with four openings and eight 
arms. 
This curious fpecies of Medufa is very accurately 
defcribed by Dr. Macri, nearly as follows, viz. 
The whole is gelatinous, pellucid, cryftalline, 
hard, tenacious, uniform, glolfy, and blueifh : the 
pileus or head is very large, hemifpherically concave, 
and extended as it were to the extremity of the Item; 
it is fmooth above, hollow beneath, and marked 
with numerous, concentric, approximated ftrire, 
which are cut or traverfed by fixteen diftant liga¬ 
ments, each emitting a very Ihort branch on each 
fide : the border is thin, fine, membranaceous, and 
fim- 
