168 THE ROYAL SOCIETY OF CANADA 



he first used, was preoccupied and on that account, in my West Coast 

 paper, I suggested the name, H. balei. It would have been more 

 correct to have used the name he used in the second place, H. par- 

 vulum, as it was not preoccupied. The correction is therefore made 

 here. 



Halecium pygmaeum Fraser 

 PL XXI, Fig. 76 

 Halecium pygmœum Fraser, West Coast Hydroids, 1911, p. 48. 



Trophosome. — Colony minute from a creeping stolon, with no 

 continuous main stem;j^a single pedicel grows out from the stolon, 

 giving rise to a hydrophore terminally; just below the hydrophore 

 one or two pedicels may be given off, each turning upwards abruptly 

 at the base; this may be repeated with the secondary pedicels until 

 a series of 5 or 6 appears, but few of the colonies have so many; each 

 pedicel has 1-3 annulations at the base; the hydrophore is tubular 

 with the margin but little everted. 



Gonosome. — Gonangia borne on the pedicels, similarly placed to 

 the hydranth pedicels; the male is long almost cylindrical but tapering 

 slightly to the distal end and more so to the proximal; the female is 

 obovate, with an opening on the side but near the distal end, shaped 

 like a half-moon; the ova are large, 6-8 in each gonangium. Usually 

 the gonangium is much larger than the whole colony which bears it. 

 In.no case have I seen more than one gonangium on one colony. 



Distribution. — San Juan Archipelago (Fraser) ; China Hat, 

 Friday Harbor. 



This species bears much resemblance to Halecium speciosum 

 Nutting in its node of branching and in its general appearance but 

 the gonangia are very much different. The resemblance to Halecium 

 nanum Alder is also quite marked. In this case the male gonangium 

 is somewhat similar in the two species although that of H. nanum 

 is shorter and stouter than that of H. pygmœum. The female gonangia 

 are different. Yet again it resembles H. curvicaule Lorenz, 

 particularly the figures and description as given by Dons. 26 Here 

 too, the male gonangia are similar but the female are not much so. 

 The presence of the two hydranths as in the case of H. nanum, dis- 

 tinguish these gonangia from those of H. pygmœum. All of the species 

 are quite minute. 



Halecium reversum Nutting 

 PL XXI, Fig. 77 



Halecium reversum Nutting, Harriman Hydroids, 1901, p. 180. 

 Halecium reversum Fraser, West Coast Hydroids, 1911, p. 48. 



26 Hydroid Bemerkungen I, 1912, p. 61-70. 



