34 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



main portion. The hydrotheca is situated like an inverted, truncated 

 cone, with a very evident diaphragm; margin entire. 



Gonosome. — Gonangium arising from near the middle of a pedicel, 

 w^ith scarcely any pedicel of its own, but turning to pass in the same 

 direction as the hydranth pedicel ; elongated, obovate, rounded at the 

 distal end, without a terminal collar. The only gonangium observed 

 was empty. 



Distribution. — Tangola-Tangola, near shore in 15-20 fathoms. 



Genus EUGOPELLA 



Eucopella everta (Clark) 



Campanularia everta Clark^ Hyd. of the Pacific Coast, 1876, p. 253. 



Eucopella everta Fraser^ West Coast Hyd., 1911, p. 37. 



Distribution. — Thurloe Point, 8-10 fathoms; South Bay, Cerros 

 Island, 10-15 fathoms. 



Eucopella minor, new species 

 Plate 8, Fig. 36 



Trophosome. — Zooids arising singly from a stoloniferous network; 

 height 1.0 mm., the pedicel 0.6 mm., and the hydrotheca 0.4 mm. Pedi- 

 cel corrugated or slightly annulated throughout; a distinctly spherical 

 portion appears directly below the hydrotheca. Hydrotheca with thick 

 wall, width 0.3 mm., scarcely flaring, nearly tubular, with 12 low, 

 rounded teeth forming a crenate margin. 



Gonosome. — Gonangium arising directly from the stolon with a 

 short pedicel, 1.25 mm. by 0.6 mm., nearly smooth, slightly obovate, 

 with the distal end truncate. One large medusoid structure occupies 

 most of the space within; in some cases, an indication of a second one 

 appears. 



Distribution. — Santa Elena Bay, on floating Sargassum. 



Genus GONOTHYRAEA 

 Gonothyraea clarki (Marktanner) 



Laomedea (Gonothyraea) clarki Marktanner-Turnerescher, Hyd. 



von Ost Spitzbergen, 1895, p. 408. 

 Gonothyraea clarki Fraser, Hyd. of Vancouver Island, 1914, p. 148. 

 Distribution. — South of Clarion Island, 50 fathoms. 



