Verrill, Notes on EacUata. 559 



Report on the Zoophytes of the United States Exploring Expedition, 

 but it is probable that even there several other species will hereafter 

 be found. It will, therefore, be useless to attempt any generalizations 

 upon the extent and limits of the several faunae occupying these coasts, 

 but it appears desirable to bring together the species already known 

 from each zoological province. 



So far as can be judged from these imperfect lists^ the faunal divis- 

 ions are the same for the Polyps as for the Echinoderms, and since 

 these were discussed in a previous article in this volume (pp. 336 to 

 339), it is unnecessary to give their limits or extent at this time. 



Arctic Province. 

 Alcyonakia. 



JPrimnoa comjjressa VerrilL Alcyojdimi ruhifornie Dana. 



Aleutian Islands. Belirings Straits and Arctic Ocean. 



ACTINAEIA. 



Urticina crassicornis Ehr. Phellia arctica Verrill. 



Arctic Ocean to Pu.^et Sound. Arctic Ocean. 



Of the four species known from this fauna two {Alcr/onium ruhi- 

 forme and Urticina crassicornis) are found also on the north Atlantic 

 coasts of America and Europe. The latter also extends southward 

 to the Oregonian fauna. The others are not known to occur south of 

 the Aleutian Islands. 



SiTCHiAN Province. 



ACTIXAEIA. 



Urticina crassicornis Ehr. Evactisf xanthof/rammicaY erriW. 



Ai'Ctic Ocean to Puget Sound. Sitcha. 



The two species known from Sitcha afford but little evidence in 

 regard to the character of the fauna, for the first is a species of wide 

 distribution on all the northera coasts both of the Atlantic and 

 Pacific, while the second is a doubtful species, which may prove 

 identical wnth K artemisia of the Oregonian fauna. 



Oregonian Province. 

 Alcyoxaria. 



Ptilosarcus Gurneyi Gray. 



Vancouver I., Puget Sound and Cape Flattery (80 feet) to Monterey. 



