78 C. McLEAN FBASEE 



Gonosome. — I have seen no description of the gonangia. They 

 were very scarce in the material I examined, but I found several 

 arranged singly, near the extremity of the upper branches, each 

 of the gonangia having its origin at the base of a hydrotheca. 

 The gonangia are oval in shape, narrowing to the attachment and 

 not so much towards the circular opening, a narrow collar being 

 formed. The surface is entirely free from spines and annula- 

 tions. Its length is almost the same as that of the hydrotheca, 

 the breadth being about two-thirds the length. 



THUIAEIA TENERA (Sars) 



Sertularia tenera Sars, Bidrag til Kundskaben om Norges Hydroider, 

 187.3, p. 20. 



Sertularia tenera Nutting, Hydroids from Alaska and Puget Sound, 1899, 

 p. 83. 



Thuiaria tenera Nutting, American Hydroids, Part II, 1904, p. 70. 



Distribution. — Kadiak Island and Bering Strait; Albatross 

 Station, 2865, N. 48° 12', W. 122° 49', 40 fathoms; St. Paul's 

 Island (Nutting). 



THUIARIA THUIARIOIDES (Clark) 



Sertularia tliuiarioides Clark, Alaskan Hydroids, 1876, p. 223. 



1 huiaria thuiarioides Calkins, Some Hydroids of Puget Sound, 1899, 

 p. 361. 



Thuiaria thuiarioides Nutting, Hydroids of the Harrimau Ex., 1901, 

 p. 186. 



Thuiaria thuinrioides Hartlaub, Hydroiden aus dem Stillen Ocean, 1901, 

 p. 354. 



Thuiaria thuiariodes Nutting, American Hydroids, Part IT, 1904, p. 64. 



Distribution. — Bering Sea, "West of Nunivak Island, 24 fath- 

 oms, Chignik Bay, Alaska (Clark) ; Puget Sound (Calkins) ; 

 Yakutat, Alaska; N. 62° 15', W. 167° 48' (Nutting). 



THUIARIA THUJA (Linna-us) • 



Sertularia thuja Linn.^us, Systema Naturae, 1758, p. 809. 

 Thuiaria thuja Kirchenpauer, Nordische Gattungen, 1884, p. 18. 

 Thuiaria thuja Nutting, American Hydroids, Part II, 1904, p. 62. 



Distribution . — Bering Sea (Stimpson) ; Albatross Station 

 2843, N. 53° 56', W. 165° 56' 45", 45 fathoms; Station 3558, N. 

 56° 58', W. 170° 09', 25 fathoms (Nutting) ; San Juan Archi- 

 pelago, Banks Island. 



