286 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



theca. When the small size of the hydrotheca is taken into consideration, 

 these may be said to be of medium size. On each cauline internode, there 

 is a nematophore in the axil of the process, and 1 laterally placed on the 

 side opposite to the process, nearer the proximal node than the distal. 



Gonosome. — Not observed. 



Distribution. — Station 792-38, off Daphne Minor Island, Galapagos, 

 70-80 fathoms; 1 mile SW of Ben Weston Point, Santa Catalina Island, 

 45-49 fathoms. 



Plumularia plumularoides (Clark) 

 Halecium plumularoides Clark, Alaskan Hyd., 1876, p. 217. 

 Plumularia plumularoides Fraser, Hyd. Pacific Coast, 1937, p. 190. 



Distribution. — East of Gull Island, south of Santa Cruz Island, 6-10 

 fathoms. 



Plumularia propinqua Fraser 

 Plumularia propinqua Fraser, Hancock Hyd., 1, 1938, p. 66. 



Fraser, ibid., 3, 1938, p. 136. 

 Distribution. — Outside Guaymas Bay, Sonora, Mexico, 6-10 fathoms. 



Plumularia reversa, new species 

 Plate 42, Fig. 52 



Trophosome. — The colony is long and slender; the stem, 7.5 cm, is 

 stout, without any indication of nodes. The slender hydrocladia are ar- 

 ranged alternately with an approach to regularity, all in the same plane. 

 The cauline process that supports the hydrocladium is longer than usual. 

 All of the hydrocladial internodes are thecate, long and slender, with 

 the hydrotheca one-third of the distance or less from the proximal node. 

 There are no internodal septa. Besides the supracalycine nematophores 

 there is a mesial, proximal to the hydrotheca, and 1 near the distal end. 

 On the hydrocladial process there is a pseudonematophore ; with a nor- 

 mal nematophore just distal to it, and 1 at the axil of the process. On the 

 stem there is a nematophore opposite, or nearly so, to the hydrocladial 

 process. 



Gonosome. — Not observed. 



Distribution. — Station 1253-41, 8 miles west of Cedros Island, 64-65 

 fathoms ; 1 mile SW of Ben Weston Point, Santa Catalina Island, 45-49 

 fathoms; 1^ miles north of Cedros Island, 20-25 fathoms; south of San 

 Esteban Island, Gulf of California, 35 fathoms. 



