66 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



smooth, elongate, obovate, nearly twice as long as the hydrocladial 

 fnternode. 



Distribution. — Black Beach, at low tide and in 25-40 fathoms. 



This species is so far from being a typical plumularian that it is a 

 question if it should not be placed in a new genus. 



Plumularia margaretta (Nutting) 



Monotheca margaretta Nutting^ Am. Hyd., Part I, 1900, p. 72. 

 Plumularia margaretta Leloup^ West Indian Hyd., 1935, p. 54. 



Distribution. — La Plata Island, 10-12 fathoms. 



Plumularia propinqua, new species 

 Plate 15, Fig. 76 



Trophosome. — Colony slender, 5 cm.; stem simple, divided into 

 regular internodes by well-marked nodes, each bearing a single hydro- 

 cladium on a prominent process near the distal end, the hydrocladia 

 alternating from side to side but in the same plane. The first hydro- 

 cladial internode is short and does not bear a hydrotheca, but all the 

 other internodes, as many as five, are hydrothecate, each bearing one 

 hydrotheca. The node between the first internode and the first hydrothe- 

 cate internode is oblique, all the rest are transverse. Hydrotheca nearly 

 equal in depth and breadth, or the depth is slightly greater; septal ridges 

 absent ; two supracalycine nematophores and one mesial nematophore on 

 each hydrocladial internode that bears a hydrotheca, one in the axil of 

 the hydrocladium and one medially placed on the cauline internode, on 

 the side opposite the hydrocladial process. 



Gonosome. — Gonangia small, not much larger than the hydrothecae; 

 oval, arising from the axils of the hydrocladia, by a short pedicel. 



Distribution. — Santa Elena Bay, 10-12 fathoms; Gorgona Island, 

 20 fathoms; Jicaron Island, 25-30 fathoms; Secas Islands, 25 fathoms; 

 Tangola-Tangola, 15-20 fathoms; off White Friars, 25 fathoms; east 

 of islands off Navidad Head, 25-35 fathoms; Isabel Island, 10-25 

 fathoms. 



Plumularia setacea (Ellis) 



Corallina setacea Ellis^ Nat. Hist. Corallines, 1755, p. 19. 

 Plumularia setacea HiNCKS, Br. Hyd. Zoophytes, 1868, p. 296. 



Distribution. — South of Clarion Island, 50 fathoms ; north of Wen- 

 man Island, low tide; Albemarle Point, low tide; Black Beach, low 

 tide; between Charles and Indefatigable islands, 60 fathoms. 



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