xl INDEX. 
Orvrr II.—PARENCHYMATA—( continued ). 
Cyclocotyle, 415 
Tristoma, 415 
Hectocotyle, 416 
Aspidogaster, 416 
Planaria, 416 
Prostoma, 417 
Derostoma, 417 
Fam. 3.—Te&nio1pEa, 417 
Tenia, 417 
Tricuspidaria, 418 
Bothryocephalus, 418 
Dibothryorhynchus, 419 
Floriceps, 419 
Tetrarhynchus, 419 
'Tentacularia, 419 
Cysticercus, 419 
Ccenurus, 420 
Scolex, 420 
Fam. 4.—CrstoreEa, 420 
Ligula, 420 
CLASS III.—ACALEPHA. 
OrvErR I.—SIMPLICIA, 421 
Medusa, 421 
Medusa proper, 422 
ANquorea, 422 
Phorcynia, 422 
Foveolia, 422 
Pelagia, 422 
Cyanea, 423 
Rhizostoma, 423 
Cephea, 424 
Cassiopea, 424 
Astoma, 424 
Berenix, 424 
Eudora, 425 
Carybdea, 425 
Beroe, 425 
Idya, 426 
Doliolum, 426 
Callianira, 426 
Tanira, 426 
Alcinoe, 426 
Ocyroe, 426 
Cestum, 426 
Porpita, 427 
Velella, 427 
