NO. 5 fraser: hydroids 237 



Abletlnaria greenei (Murray) 

 Sertularia greenei Murray, Ann. and Mag. Nat. Hist., (3), V, 1860, p. 



504. 

 Ahietinaria greenei Fraser, Hyd. Pacific Coast, 1937, p. 132. 

 Distribution. — Off Point Arguello, Calif., 15-30 fathoms. 



Abietinaria pacifica Stechow 

 Plate 27, Fig. 16 



Abietinaria pacifica Stechow, Hyd. Fauna des Mittelsmeeres, etc., 1923, 



p. 197. 

 Fraser, Hyd. Pacific Coast, 1937, p. 134. 



Trophosome. — In 1923, Stechow described the species A. pacifica 

 from a fragment 6 mm long, on the back of a crab. It has not been re- 

 ported since until now that several fine colonies have appeared in the 

 Hancock collections obtained in the region extending from the northern 

 Channel Islands, Calif., to Cedros Island, Lower Calif. Many of these 

 are larger, up to 9.5 cm, with numerous branches arranged regularly, as 

 they are in the smaller specimens. Some of the branches are longer than 

 the 7 mm which Stechow mentions; the longest 12 mm. 



Gonosome. — (Not previously described.) The gonangia are similar 

 to those of A. traski, but instead of being crowded on the face of the 

 branches, they are scattered, with but few on a branch. They are similarly 

 obovate, without a collar, and with a smooth surface. 



Distribution. — 1 mile NE of San Miguel Island, 35-39 fathoms; J^ 

 mile south of Crook Point, 41-43 fathoms; 6^ miles SE of South Point, 

 Santa Rosa Island, 46 fathoms; 3^ miles east of South Point, 35-38 

 fathoms; Santa Cruz Channel, 32-34 fathoms; Prisoners Harbor, Santa 

 Cruz Island, 35-45 fathoms; 1 mile north of San Pedro Point, 45-46 

 fathoms; 3 miles NW of Anacapa Island, 47-52 fathoms; 1 mile north of 

 west end of Anacapa Island, 45-46 fathoms; 10% miles west of Point 

 Dume, 47-48 fathoms; off Redondo Beach, 96-120 fathoms; east of Long 

 Point, Santa Catalina Island, 35-46 fathoms; off White Cove, 40-80 

 fathoms; Avalon Bay, 98-116 fathoms; 5 miles SE of Santa Catalina 

 Island, 140-150 fathoms; 5 miles SE of Church Rock, 109-116 fathoms; 

 \y2 miles north of Cedros Island, 55-60 fathoms; 8 miles west of Cedros 

 Island, 64-65 fathoms; Ranger Bank, west of Cedros Island, 76-83 fath- 

 oms; 5y2 miles south of San Benito Islands, 69-81 fathoms. 



Remarks. — The species bears much resemblance to A. traski (Tor- 

 rey), even in color, and must be closely related to that species. The main 

 differences are in the shape of the hydrotheca, the distance between suc- 

 cessive hydrothecae, and particularly, the distance to the first hydrotheca 

 on the branch. 



