6n Canadian Arctic Expedition, 1913-18 



L. Agassiz and A. Agassiz (1865), common in the gulf of Georgia; but of this 

 no full description or figure has ever been published, nor is it sure that the 

 hydroid described as mertensii by A. Agassiz (1865) and by Fraser (1914) belongs 

 to the Medusa in question. Finally a Bougainvillea from Victoria harbour, 

 British Columbia, has been recorded by Murbach and Shearer (1903) as B. 

 mertensii, which apparently belongs to superciliaris. Torrey (1904, p. 7), has 

 described the hydroid stage of a new Bougainvillea, B. glorietta, from San Diego, 

 California, but its free Medusa is still unknown. And my own account of a 

 typical B. superciliaris from Attu island, Aleutian islands (1913, p. 9) completes 

 the list. 



Considering how wide an area is covered by these few records, and how 

 many species or races of Bougainvillea are known from both sides of the North 

 Atlantic, probably the present record of B. britannica is but a forerunner of 

 others to come from the Pacific. 



B. britannica was previously known from both sides of the North Atlantic 

 (Mayer, 1910; Hartlaub, 1911), B. principis from North European waters and 

 from Barents sea (Hartlaub, 1911). 



Rathkea blumenbachii (Rathke). 



Oceania blumenbachii Rathke, 1835, p. 321. For synonymy, see Mayer, 1910, p. 177, 179, 

 and Hartlaub, 1911, p. 229. 



Stations 25 b, c. Arctic ocean, off Cooper island, near point Barrow, Alaska, 

 August 27-28, 1913, eleven very fragmentary specimens. Station 18d, lat. 

 62N., long. 167 30'W; July 7, 1913, one specimen, 2mm. high, in fair condition. 



The number (8) of marginal tentacle-bundles and the structure of the lip 

 and oral appendages make identity with the larger series from New England, 

 Newfoundland, and Bering sea, with which I have been able to compare them, 

 certain (19096, 1913). All the specimens show budding phases; but they are 

 in such poor condition that they add nothing to the numerous existing accounts 

 and figures of this well-known species. 



From its wide distribution in Arctic waters, this species was to be expected 

 off the northern coast of Alaska (1913, p. 11). 



Family PANDEID^E Haeckel. 



Halitholus cirratus Hartlaub. 



PL 1, Figs. 2, 3. 

 Halitholus cirratus Hartlaub, 1913, p. 274. . 



This species has several times been recorded from arctic waters, as " Tiara 

 conifer a Haeckel." But Hartlaub, who has seen the original specimen of coni- 

 fera (1913, p. 284), found that it was really probably a Catablema vesicaria. 

 Therefore to the specimens recently recorded as conifera and to others he him- 

 self has studied, he has given the name Halitholus cirratus. 



The species has been fully described by him, and he has given in detail 

 the grounds for considering Halitholus a genus distinct from other Pandeids, 

 chief of these being the combination of gonads of the Leuckartiara type, with 

 folded lip, and lack of mesenteries; the latter separating it from its closest 

 relatives, Leuckartiara and Catablema. So far, two species have been described, 

 both by Hartlaub (1913), H. pauper and H. cirratus (both had previously 

 masqueraded as Tiara conifera)', the two separable by absence of peduncle 

 and few tentacles in the former, its presence, with many tentacles, in the latter. 



