NO. 1 eraser: hydroids 65 



cept veiy occasionally, when there may be an intermediate internode. 

 These internodes are long and slender so that there is a long interval 

 between the successive hydrothecae. Hydrotheca shallow campanulate; 

 supracalycine nematophores absent. There is a nematophore above and 

 one below the hydrotheca and one at the axil of each hydrocladium. 

 Hydranths too large to be entirely retracted into the hydrotheca. 



Gonoso7ne. — (Not previously described.) Gonangium arising from 

 the hydrocladial process of the stem; elongated obovate, with a very 

 short pedicel; nearly twice as long as the hydrocladial internode. 



Distribution. — Black Beach, low tide; Post Office Bay, 35-40 fath- 

 oms. 



Plumularia lagenifera Allman 



Plumularia lagenifera Allman^ Proc. Linn. Soc. London, 1885, p. 157. 



Nutting, Am. Hyd., Part I, 1900, p. 65. 

 Fraser, Hyd. of Vancouver Island, 1914, p. 207. 



Distribution. — James Bay, 50-70 fathoms; Cartago Bay, 32 fath- 

 oms; east of islands off Navidad Head, 25-35 fathoms; Santa Maria 

 Bay, 10 fathoms; ofif Thurloe Point, 8-10 fathoms; South Bay, Cerros 

 Island, 10-15 fathoms. 



Plumularia magellanica Hartlaub 



Plate IS, Fig. 75 



Plumularia magellanica Hartlaub, Magellan Hyd., 1905, p. 684. 



Trophosome. — Colony rather diminutive, 4 mm. high; main stem 

 erect or slightly geniculate, definitely divided into internodes. From 

 near the distal end of each internode a hydrocladium, if it can be 

 called such, is given ofif, these regularly alternating and in the same 

 plane. The hydrocladium may consist of a support for a single hydro- 

 theca, or for two or more in a series, the support in each case having 

 one or more nodes present. In each instance where there is more than 

 one hydrotheca in the series, the extra hydrothecae are supported by 

 pedicel-like structures arising from the preceding one, just below thi 

 hydrotheca. In each the pedicel or support becomes gradually broader 

 from the proximal to the distal end, where it meets the hydrotheca. 

 There are no nematophores anywhere in the colony. 



Gonosome. — (Not previously described.) Gonangium arising from 

 the hydrocladial process of the stem, or directly from the internode; 



