134 ALLAN HANCOCK PACIFIC EXPEDITIOXS VOL.8 



The spicules show some similarity to those characteristic of Thyone 

 strangeri (see pi. 19), and for a while I thought that Ludwig had made 

 a mistake In counting the tentacles. Re-examination of the type and com- 

 parison of the spicules showed beyond doubt that Ludwig was right and 

 that the 2 species cannot possibly be confused as a glance at the figures of 

 the spicules will show. 



It Is remarkable that this well-defined species has never been taken 

 again, especially since the type localit}^ is one of the most frequently vis- 

 ited collecting grounds in the Panamic waters. 



2. Phyllophorus zacae Delchmann 

 Plate 24, Figs. 12-21 



Phyllophorus zacae Delchmann, 1938, p. 381. 



Diagnosis. — Medium-sized form, feet numerous scattered almost uni- 

 formly over the body, not crowded. Tentacles 15-20 In number, long, 

 delicate, of varying size. Calcareous ring with well-developed posterior 

 prolongations on the radials ; the anterior tooth Is long rectangular with 

 a constriction at Its base; the interradlals are more or less heart shaped 

 with a broad base, overlapping the radials and with a short tooth. 



Spicules delicate tables with oval disk with 4 larger and 4 smaller 

 holes, the latter often wedge shaped; spire with 2 to 4 pillars, a single 

 crossbeam, and ending in 4 tufts of few spines, sometimes reduced to 4 

 undivided spines. Feet with large end plate and a few supporting tables 

 with broad oblong disk with numerous holes ; spire low or moderately 

 high with one crossbeam, and usually ending in 2 diverging spines or 

 horns or in a single point. Introvert with delicate tables; tentacles with 

 delicate rods and rosettes. Color reddish to white. 



Type.— M.C.Z. 



Type locality. — Tangola Tangola Bay, Mex. 



Distribution. — Ranging from L. Calif, to the Galapagos. 



Depth. — ^The type came from 10 fms. depth. 



Specimens exa?nined. — The type, and 4 individuals from the follow- 

 ing Velero III stations : 



190-34. Galapagos, Lat. 0° 55' S. ; Long. 90° 30' W., 58-60 fms., Jan- 

 uary 26, 1934, 2 young. 

 517-36. East side of San Francisco Island, Gulf of Calif., 15 fms., Feb- 

 ruary 25, 1936, 1 specimen, oral end missing. 

 816-38. North of Hood Island, Galapagos, 50-100 fms., January 29, 

 1938, 1 specimen. 



