242 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



Sertularella fusiformis (Hincks) 



Sertularia fusiformis Hincks, Ann. and Mag. Nat. Hist., (3), VIII, 



1861, p. 253. 

 Sertularella fusiformis Fraser, Hyd. Pacific Coast, 1937, p. 153. 



Fraser, Hancock Hyd., 1, 1938, p. 52. 



Distribution. — East of Point Fermin, Calif., shore; 1 mile NW of 

 White Cove, Santa Catalina Island, 2-3 fathoms. 



Sertularella multinoda, new species 

 Plate 28, Fig. 18 



Trophosome. — Colony simple, rigid, 2.5 mm, with few branches, simi- 

 lar to the main stem, given of? irregularly but alternately. The stem and 

 branches are sinuous ; the internodes are short, and the bend takes place at 

 the oblique node. There may be some sign of annulation or wrinkling in 

 the stem and branches. A hydrotheca is given ofiF by each internode, the 

 hydrotheca alternating; as the internode is so short, the hydrotheca is 

 usually longer than the short, opposite side of the internode. The hydro- 

 theca is nearly cylindrical, but is slightly turgid near the base, and slightly 

 contracted below the margin. There are 3 teeth on the margin, usually 2 

 of them more prominent than the other one; there are 3 opercular flaps. 

 The surface is transversely corrugated, with the rounded corrugations 

 usually visible all around the hydrotheca. 



Gonosome. — The gonangia appear either on the stem or on the 

 branch; they are elongated oval, 1.4 x 0.6 mm, tapering quite sharply to 

 each end ; the distal end forms a short, slender neck, with the terminal 

 aperture small. The whole surface is transversely corrugated, with 

 rounded corrugations. 



Distribution. — Station 287-34, South Bay, Cedros Island, 10-15 fath- 

 oms. 



Remarks. — The species resembles Sertularella pinnata Clark more 

 than any other species recorded from the northeast Pacific, but the colony 

 is not so irregular, the cauline internodes are shorter, the teeth on the mar- 

 gin of the hydrotheca are not so prominent, but the annulation through- 

 out the colony is more in evidence, particularly in the wall of the hydro- 

 theca. The gonangium is on the same general plan, but it is not askew as 

 it is in S. pinnata. The differences are too great to indicate very close 

 relationship. 



