XORTH AMERICAN ALCYONARIA. 545 



an error. According to our definition of the groups, group D 

 has cyclosystems on the anterior surface of the branches only. It 

 is group which has the cyclosystems evenly distributed over 

 the surfaces of the branches. In Allopora norvegica, according 

 to Broch's own description and figures of the species, as well as in 

 the Cape species {Allopora nobilis), the cyclosystems are dis- 

 tributed on all sides of the branches, they are cei-tainly not 

 confined to the anterior surface of the flabellum, as they are in 

 the species of our group D. 



The subgenus Allojwra, however, is usually distinct from the 

 other subgenus Eustylaster of Broch, not only in the character 

 given to our group C — that the cyclosystems are distributed on 

 all surfaces of the branches, — but also in two ill-defined but 

 still mutually dependent characters, namely, that the terminal 

 branches are relatively thick, and that the ampullpe do not project 

 or project slightly from the surface of the ccenenchym. 



Returning now to our species from Vancouver Island. It 

 clearly belongs to our group C, as the cyclosystems are more or 

 less evenly but irregulai'ly distributed on all sides of tlie branches. 

 It may therefore be placed in the subgenus Allopora of the genus 

 Stylaster. The determination of the species is a much more 

 difficult matter in the absence of any information about the 

 ampullae or gonophores. The cliaracters of the coenosteum, as seen 

 without fracture, are similar to those of the species from the 

 Norwegian coast except in i-espect of colour, which is salmon-red 

 instead of white or faintly rose. The colour- difference by itself 

 does not seem to me to be a character upon which it is wise to 

 establish a distinct species, and therefore I am disposed to regard 

 the species as identical with the ISTorwegian species. 



The proper name of this species has recently been discussed 

 by Broch (1914, p. 17), and I am in agreement with him that 

 it should stand as Stylaster [Allopora) iwrvegicus Gunnerus. 

 Whether this species is identical or not with the Allopora octdina 

 of Ehrenberg cannot be determined with any degree of certainty, 

 but thei'e can be little doubt that it is the same as the Allojjora 

 oculina of Moseley's 'Challenger' Report (1881, p. 85). 



It seems very probable that the ,species is also identical with 

 Verrill's Allopora californica from deep water off" the coast of 

 California. Verrill's specimen was 3 inches (75 mm.) or more in 

 height, had cyclosystems "02 inch (0*5 mm.) in diameter, with, 

 visually, six dactylopores, and was light " minium " red in colour. 

 From the description there are no points of distinction of this 

 form from AUopiora norvegica, except colour. 



Note on the Gonophores of the Stylaster id,ce. 



In his recent work, Broch (p. 20) attributes to Moseley the 

 view that the gonophore of the Stylasteridse is a special formation 

 in the group, and is not homologous with the adelocodonic 

 gonophore of other Hydrozoa. This was certainly not Moseley's 



