64 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



hydrocladium with alternating nonhydrothecate and hydrothecate inter- 

 nodes, the proximal being nonhydrothecate; nodes alternately trans- 

 verse and slightly oblique. Hydrotheca nearly equal in depth and 

 breadth. Two supracalycine nematophores and a mesial on the hydrothe- 

 cate internode, none on the nonhydrothecate internodes; two nemato- 

 phores at the axil of the hydrocladium and one on the cauline internode 

 on the side opposite the hydrocladium. 



The characteristic feature of the species is the lack of nematophores 

 on the nonhydrothecate internodes. 



Gonosome. — Not observed. 



Distribution. — Off La Plata Island, 45-55 fathoms. 



Plumularia delicata Nutting 



Plumularia delicata Nutting, Hawaiian Hyd., 1905, p. 951. 

 Distribution. — North of Wenman Island, 100-150 fathoms. 



Plumularia filicula Allnian 



Plumularia filicula Allman, Hyd. Gulf Stream, 1877, p. 29. 



Nutting, Am. Hyd., Part I, 1900, p. 58. 



Distribution. — Off La Plata Island, 45-55 fathoms. 



Plumularia floridana Nutting 

 Plumularia floridana Nutting, Am. Hyd., Part I, 1900, p. 59. 



Distribution. — Albemarle Point, low tide; Santa Elena Bay, on 

 drifting Sargassum and in 10-12 fathoms; Pacora Island, 15-25 fath- 

 oms; Tangola-Tangola, on coral at low tide. 



Plumularia inermis Nutting 

 Plate 15, Fig. 74 



Plumularia inermis NuTTiNG, Am. Hyd., Part I, 1900, p. 62. 



Fraser, Beaufort Hyd., 1912, p. 382. 



Trophosome. — Colony simple, unbranched, 12 mm., divided into 

 long, slender internodes, each of which bears a hydrocladium from a 

 process near the distal end. The hydrocladia are divided into regular 

 internodes, all of which, including the proximal, bear hydrothecae, ex- 



