226 



ALLAN HANCOCK PACIFIC EXPEDITIONS 



VOL. 8 



The five visits of the Velero to the Galapagos, occupying 245 stations, 

 have undoubtedly served the purpose of making the Echinoderm fauna 

 of that group sufficiently well known to warrant the belief that it is 

 essentially American and has not received any considerable influx of 

 Indo-Pacific forms. Several of the species are, so far as we now know, 

 endemic and warrant a belief in the long-sustained isolation of the marine 

 fauna. In view of this it is worth while to list here the Galapagos Echini 

 with a few words as to their occurrence : 



Eucidaris Thouarsii 



Hesperocidaris panamensis 



Centra cidaris Doederleini 

 Centrechinus mexicanus 



Centrostephanus coronatus 



Lytechinus semituberculatus 

 Toxopneustes roseus 

 Tripneustes depressus 

 Caenocentrotus gtbbosus 



Echinometra oblonga 



VanBrunti 

 Clypeaster elongatus 



europacificus 



ochrus 



rotundus 

 Encope galapagensis 

 Cassidulus pacificus 

 Agassizia scrobiculata 

 Brissopsis pacifica 



generally Panamic and western 

 Mexico 



Cocos Island, Galapagos Islands and 

 Ecuador 



Cocos and Galapagos Islands 

 generally Panamic, Mexico and 

 Galapagos Islands 

 generally Panamic, Gulf of Cali- 

 fornia, southern California 



Galapagos Islands 



Panamic, Socorro Island 



Panamic, Mexican Islands 



Ecuador, Peru and Galapagos 



Islands 



Indo-Pacific to Northern Galapagos 



Islands and Mexican Islands 



Panamic, Western Mexico 



Galapagos Islands 



Panamic, Western Mexico 



Panamic 



Panamic, Western Mexico 



Galapagos Islands 



Panamic, Mexican Islands 



Panamic, Gulf of California 



Panamic, Western Mexico, 



southern California 



