178 DISCOPHOR^. Part III. 



the absence of Rhizostome^e is remarkable. In the CoUnnbian Fauna, including Sitka 

 and the Aleutian Islands, with which the Asiatic species of the same latitude, and 

 as far north as Behring Strait, are here united, from Avant of sufficiently precise 

 data to separate them, we have Aurelia labiata and liiubata, Sthenonia albida, 

 Heccjedecomma ambigumn, Phacellophora camtschatica, Cyanea ferruginea and Pos- 

 telsii, Pelagia Brandtii, Polybostrycha helvola, Melanaster Mertensii, and ^ginopsis 

 Laurentii. Aurelia limbata and Cyanea ferruginea are common to Kamtschatka and 

 the Aleutian Islands; Sthenonia albida, Phacellophora camtschatica, and Melanaster 

 Mertensii, are only known from Kamtschatka, and Heccjedecomma ambiguum, Cyanea 

 Postelsii, and Polybostricha helvola, only from the north-west coast of America, 

 while jEginopsis Laurentii is from the Behring Sea. No Rhizostomese have thus 

 far been noticed in this northern area of the Pacific; but the whole family of 

 Sthenonidie belongs to this region, no representatives of it having been found any- 

 where else. The abundance of Cyaneidaj and Pelagidfe is also remarkable. 



In the Mediterranean and Lusitanic Faunge we find Rhizostoma pulmo, Stylo- 

 nectes luteus, Stomaster canariensis, Cotylorhiza tuberculata, Aurelia aiirita, Cyanea 

 lusitanica, if different from the Celtic species, Pelagia noctUuca, including the species 

 referred to Nausithoe, Chrysaora mediterranea, if not identical with Chr. hysoscella 

 of the Celtic Fauna, Campanella (iEginopsis) mediterranea, several species of Fove- 

 olia (Cunina) and Pegasia (^ginata), and Marsujjialis Planci. The many Rhizo- 

 stomea3 and Haplostomete, and especially the latter, are very characteristic of the 

 Mediterranean Fauna. Off Cape de Verd Islands, we have Pelagia Lessoni, Quoyia 

 bicolor, and probably also Dodecabostrycha dubia. In the southern Atlantic and 

 off Cape of Good Hope, Rhizostoma capensis, Aurelia colpota, Placois discoide.a, 

 Chrysaora Reynaudii, Foveolia diademata, Pegasia dodecagona, and a species allied 

 to ^Egina rosea have been observed. There is a striking resemblance between 

 the Fauna of the Cape and that of the Mediterranean. 



On the American side of the Atlantic, south of Cape Cod and north of Cape 

 Hatteras, we find Cyanea fulva and Dactylometra quinquecirra, the latter extending 

 far to the eastward, in the Atlantic ; in the Carolinian Fauna, Stomolophus mele- 

 agsis, Cyanea versicolor, and Cunina octonaria; in the Charyba^an Fauna, Polj^clonia 

 frondosa, Aurelia marginalis, and Pelagia cyanella ; in the Brazilian Fauna, Rhacojiilus 

 cyanolobatus and cruciatus, Lobocrocis Blossevillii, Dactylometra lactea. Zygonema 

 volutata, Tamoya haplonema, and Chiropsalmus quadrumanus. Under the tropics 

 only four species have thus far been noticed, in the Atlantic Ocean : Toxoclytus 

 roseus, Favonia hexanema, Patera cerebriformis, and Charybdea periphylla. 



In the Patagonian Fauna the following species have been observed, Couthouyia 

 pendula, Medora reticulata and capensis, and Desmonema Gaudichaudi. Off Peru 

 and Chili, Pelagia tuberculata, Stenoptycha plocamia, and ^quorea (Pegasia) rhodo- 



