GEOGRAPHICAL DISTRIBUTION. 



363 



Diphyopsis chamissonis 

 Ch uniphyes mult ide nta ta 

 Forskalia contorta 

 Forskalia edwardsi 

 Erenna bedoti 

 Agalma okeni 

 Agalma elegans 

 Stephanomia rubra 

 Stephanomia cupulifera 

 Stephanomia amphitridis 

 Stephanomia bijuga 



Physophora hydrostatica 

 A nthophysa rosea 

 Archangelopsis typica 

 Rhizophysa filiformis 

 Rhizophysa eysenhardtii 

 Pterophysa grandis 

 Pterophysa studeri 

 Bathyphysa sibogae 

 Physalia utriculus 

 Velella lata 

 Porpita umbella (?) 



The species in italics are contained in the "Albatross" collection. Of the 

 total of forty-four the "Albatross" collection contains thirty-two and of the 

 remaining twelve, four are described as new from the "Siboga" collection, and 

 two genera which were well preserved in the "Siboga" collection are likewise 

 represented by fragments in the "Albatross" collection. On the other hand, 

 all but fifteen of the fifty-one species collected in the Eastern Pacific are known 

 from the Malaysian region as well. Considering how few collections have been 

 made either in the Pacific or in the Malaysian area, the agreement between the 

 two is so close that it is impossible to draw any faunal line between them, so 

 far as their Siphonophores are concerned. 



Our knowledge of the Siphonophore fauna of the Indian Ocean is due chiefly 

 to Huxley, to Haeckel, and to a few scattered records by other authors. So far 

 as I can learn, the list of well-authenticated species is restricted to the following : — 



Sphaeronectes truncata 

 Sphaeronectes princeps 

 Muggiaea huxleyi 

 Cuboides vitreus 

 ? Desmalia imbricata 

 ? Desmophyes annectans 

 Abyla trigona 

 Galeolaria australis 

 Diphyes appendiculata 

 Diphyopsis dispar 

 Diphyopsis mitra 

 Diphyopsis chamissonis 

 Apolemia uvaria 



Leaving out of consideration the 

 may be nothing but Physophora 



Agalma okeni 

 Agalma haeckeli 

 Stephanomia amphitridis 

 Lynchagalma utricularia 

 ? Discolabe quadrigata 

 ? Rhodophysa corona 

 ? Athorybia rosacea 

 Rhizophysa eysenhardtii 

 Epibulia I'itteriana 

 Velella lata 

 Porpita porpita 

 Physalia utriculus 



doubtful Discolabe quadrigata Haeckel, which 

 hydrostatica, and the problematical Desmalia 



