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 



AcALEPHA 



Order. 



i Acalephee simplices. 

 ( Acalephfe hydrostaticao. 



ORDER I. — AcALEPH^ Simplices. 



Genus. 



Medusa 



Subgenus. Ejcample of Species. 



f 1. Medusa, prop 



2. jEquorea M. £Equorea, Gni. 



3. Phorcynia M. moUicina, Forsk. 



4. Foveolia 



5. Pelagia O. pauopyra, Peron. 



(J. Cyaiipea Med. aurita. 



7- Rhyzostoma Med. pnlnio, Gui. 



8. Cephaea Med. cephsea, Forsk. 



9. Cassiopea Med. froiidosa, Pal. 



10. Astoma Med. proboscidalis, Foi sk 



11. Berenice B. carisochronia, Per. 



12. Eudora End. moneta, Cuv. 



13. Carybdea Med. marsupialis, Gni. 



14. Beroe Med. pileiis, Cm. 



15. Idya Med. int'iindibidum, Gm. 



16. Dolioliiiii D. Mediterraiieum, Otto. 



17- Calliaiiiia C didiploptera, Per. 



18. Janira Beroe hexagoiie, Brug. 



li). Alcinae o A. voniiicidata, llaiis, 



20. Ocyroc O. inaciilata, Rans. 



V^21. Ce.stimi Cest. Veneris, Leseur. 



Porpites, 

 Velella , 



Med, innbclki, Midi. 

 Med. velelhi, Gm. 



V 



