CLASS III. — ACALEPHA. 
Commonly called sea-nettles. These display some appearance 
of internal vessels, which, however, are mere productions of the 
intestines in the substance of the body. 
They include two orders. 
Class. Order . 
. ( Acalephse simplices. 
Acalepha . • ^ Aealephse hydrostaticae. 
ORDER I. — Acaleph/e Simplices. 
Genus . 
Medusa . 
Subgenus . Example of Species . 
C 1, Medusa, prop 
2. iEquorea M. aequorea, Gra. 
3. Phorcynia M. mollicina, Forsk. 
4. Foveolia 
5. Pelagia O. panopyra, Peron. 
6. Cyanaea Med. aurita. 
( 7- Rhyzostoma Med. pulmo, Gm. 
8. Cephaga Med. cephaea, Forsk. 
9. Cassiopea Med. frondosa, Pal. 
10. Astoma Med. proboscidalis, Forsk. 
( 11. Berenice B. carisochroma, Per. 
| 12. Eudora Eud. moneta, Cuv. 
I 13. Carybdea Med. marsupialis, Gm. 
14. Beroe Med. pileus, Gm. 
15. Idya Med. infundibulum, Gm. 
16. Doliolum D. Mediterraneum, Otto. 
17- Callianira C. didiploptera, Per. 
18. Janira Beroe hexagone, Brug. 
19. Alcinae a A. vormiculata, Rans. 
20. Ocyroc .......... O. maculata, Rans. 
^21. Cestum Cest. Veneris, Leseur. 
Porpites 
Velella 
Med. umbella, Miill. 
Med. velella, Gm. 
