DISTRIBUTION. 



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Within the Pacific region the following eleven areas can be distinguished, 

 in no two of which the same species has been found. 



Sidonops californica. 

 " angulata 



var. megana 

 " microana 

 " orthotriaena 

 " bieolor 

 Geodia mesotriaena 



var. pachana 

 " megana 

 " microana 



mesotriaenelhi 

 breviana 

 ovis 



acanthtylastra 

 Geodinella robusta 



var. earolae 

 " megaclada 

 " niegasterra 



Sidonops reticulata 

 Geodia ataxastra 



var. angustana 

 " latana 

 " media. 



West coast of North America. 



22° 15' N. 

 Southern California. 



from 33° 18' N.to Monterey Bay, Cal. 

 from 33° 3S' 45" N. to 34° 22' N. 



from 33° 50' 45" N. to Naha Bay, Behm Canal, S. E. Alaska. 

 Santa Barbara Lsland. 



Southern California and near Como.x, Strait of Georgia. 

 34° 1' 30" N. 

 22° 52' N. 



Southern California, Queen Charlotte Sound, and Naha B.ay, Behm 

 Canal, S. E. Alaska. 



West coast of Central America. 



Mexico (? which coast). 

 Perico Island, Gulf of Panama. 



Gulf of Panama and Mexico (? which coa.=:t). 



Sidonop.s oxyastra 

 Geodia cooksoni 

 " micropora 



Eastern Pacific Islands.. 



Duncan Island, Galapagos. 

 Charles Island, Galapagos. 

 Duncan Island, Galapagos. 



