252 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



Family PlumulaHdae 

 Genus AGLAOPHENIA 



Aglaophenia diegensis Torrey 



Aglaophenia diegensis Torrey, Hyd. Pacific Coast, 1902, p. 71. 



Fraser, Hyd. Pacific Coast, 1937, p. 175. 

 Fraser, Hancock Hyd., 1, 1938, p. 56. 

 Fraser, ibid., 2, 1938, p. 111. 



Distribution. — ^ mile off Cat Rock, Ancapa Island, 125-135 fath- 

 oms; 5 miles — 152° from San Pedro breakwater, 17-19 fathoms; San 

 Diego, shore ; of? Coronado Beach, San Diego, 6-7 fathoms ; San Lorenzo 

 Channel, Gulf of California, 3-5 fathoms; San Francisco Island, shore; 

 north of Isla Partida, 46-75 fathoms ; north of Lobos Point, shore ; Tepo- 

 ca Bay, shore; Guaymas Bay, shore and 2-3 fathoms; off Magdalena 

 Island, Tres Marias Islands, Mexico, 13 fathoms; south of San Francisco 

 Island, Ecuador, 47 fathoms. 



Aglaophenia dispar, new species 

 Plates 29, 30, Fig. 23 



Trophosome. — Colony consists of a somewhat slender, lax stem, 12 

 cm, with several long branches on each side, irregularly arranged ; occa- 

 sionally smaller, secondary branches appear. The stem is divided regularly 

 into short internodes by nodes so deeply cut that the end of the internode 

 appears to be rounded; each internode bears a hydrocladium, centrally 

 placed, well forward on the face, so that the angle between two alternate 

 hydrocladia at the base is small. The hydrocladia are relatively short, the 

 longest 8 mm, but most of them are considerably less than this. The nodes 

 here are also well marked but not so distinctly cut as they are on the stem 

 or branch. There is a slight indication of a septum opposite the intrathe- 

 cal septum, but there are no others. The hydrotheca is short and stout, 

 with the septum very short. The margin is provided with 1 1 much dis- 

 similar teeth ; the median is short but sharp and is retrorse ; the first lateral 

 is much longer than any of the others and is also sharp but not so distinct- 

 ly so as the median ; the second lateral is the shortest of the lot; the third 

 and fourth are much the same shape as the second, but at least twice as 

 large ; the fifth is as high as the third or fourth but is more slender; all of 

 these are sharp pointed. The supracalycine nematophores are smaller than 

 usual, not reaching the margin of the hydrotheca; the mesial nematophore 

 is in contact with the face of the hydrotheca for fully three-fourths of its 



