6 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



flora appears to be in the vicinity of Thurloe Point. There the large 

 kelps, so characteristic of the coasts of the United States and Canada, 

 make their first striking appearance, and other species appear, coinci- 

 dent with these. 



In the collection, the various families are specifically represented as 

 follows : 



Species Distribution by Families 



Number of 

 new species 



4 

 1 



3 

 4 

 3 

 8 



3 

 1 



14 

 2 

 7 

 1 

 2 

 3 

 6 



11 



Total 173 73 



As compared with the hydroid fauna of the Pacific coast of Canada 

 and the United States, the percentage of gj'^mnoblastic species is high, 

 both in the complete list and in the list of new species (46 species, 26 

 new). Among the calyptoblastic families, the percentage of the Sertu- 

 laridae is low, except in the genus Sertularia, and that of the Plumu- 

 laridae is high. There are no representatives of the genera, Selaginopsis 

 and Abietinaria and only two species of Thuiaria, all of which are 

 common in the more northern waters. Except in the Gymnoblastea and 

 in one or two of the smaller families of Calyptoblastea, in which the 

 number of new species is high, there is much the same percentage of 

 new species throughout. 



