NO. 5 FRASER : HYDROIDS 265 



Antennularia inconstans, new species 

 Plate 33, Fig. 33 



Trophosome. — Colonies, loosely clustered, reach a height of 7 cm ; the 

 stem is stout, with but few nodes indicated. The slender hydrocladia are 

 biserially arranged, in the same plane, but the relative position of those 

 on the two sides is not at all constant, nor is the distance between two in 

 succession on the same side. The hydrocladial process is of medium length ; 

 it usually bears a pseudonematophore and 3 normal nematophores, 2 of 

 them on the shoulder, and the other farther out, but sometimes the single 

 one is missing. All of the internodes are thecate; on the first internode, 

 the hydrotheca is nearly centrally placed, but on the others it is about 

 twice as far from the proximal as the distal. On the first internode, be- 

 sides the supracalycine nematophores, there are usually 2 proximal, and 

 1 distal to the hydrotheca, medially placed ; in the others, the number is 

 not constant, but most commonly there are 3 median nematophores proxi- 

 mal to the hydrotheca, and none distal to it. The internodal septa, one 

 near each end of the internode, are present, but not very distinctly 

 marked. The number of cauline nematophores between 2 hydrocladia in 

 succession on the same side, is not constant, but is usually 3, unless the 

 distance is short, when more commonly there are but 2. 



Gonosome. — As is usual in the genus, the gonangia are small; they 

 are obovate, sometimes slightly curved, attached to the shoulder of the 

 hydrocladial process. 



Distribution. — Station 1084-40, off San Pedro Nolasco Island, Gulf 

 of California, 93-111 fathoms; 1^ miles north of Cedros Island, 45-55 

 and 55-60 fathoms. 



Antennularia inverta, new species 

 Plate 34, Fig. 34 



Trophosome. — Colony, 4.5 cm, grows singly, erect; the stem is di- 

 vided into regular internodes by well marked nodes, with the stem con- 

 stricted at the nodes. There are 2 hydrocladia given off each internode in 

 the same plane ; in the proximal portion, these are opposite, or at least, 

 sub-opposite, placed near the distal end of the internode; more distally, 

 one of them remains in this position, but the other gets farther and farther 

 from the distal node until finally it is nearer the proximal node; the 

 hydrocladial process is of medium length. The hydrocladia are quite con- 

 stant in their division into internodes, all of which are thecate, except that 

 the proximal internode is somewhat shorter than the others. The hydro- 



