268 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



ond, and in all of the athecate internodes, there is a single, mesial nemato- 

 phore; the supracalycine nematophores present no unusual feature. In 

 most instances, there is a cauline nematophore on each side of the stem 

 between 2 successive hydrocladia. 



Gonosome. — Not observed. 



Distribution. — Station 1260-41, Dewey Channel, opposite San Eu- 

 genio Point, Lower Calif., 21-26 fathoms. 



Antennularia polynema, new species 

 Plate 35, Fig, 37 



Trophoso?7ie. — Colony, long, 13 cm, and rather slender, consists of a 

 stem of medium diameter, constricted at the well marked nodes. Four 

 slender hydrocladia arise from each internode, with a decussate arrange- 

 ment. The process is of medium length or less, with a well developed 

 pseudonematophore. In most cases, all of the hydrocladial internodes are 

 thecate; the septa are indistinct or absent. The proximal internode is 

 shorter than the others, with the hydrotheca centrally placed. The others 

 are of similar length, with the hydrotheca not far from the distal node. 

 Occasionally, in the distal portion of the hydrocladium, a node may be 

 inserted to divide the internode into two, the proximal being athecate and 

 the distal, thecate. There is a pair of supracalycine nematophores with 

 each hydrotheca; on the proximal internode, there are 2 mesial nemato- 

 phores proximal to the hydrotheca, and in the other, longer internodes, 

 there are 3 of them. When the long internode is divided by an extra node, 

 2 nematophores remain on the athecate internode, and 1 on the thecate. 

 There are 2 nematophores in, or near, the axil of the hydrocladial process, 

 and 1 between the pseudonematophore and the node. The cauline nemato- 

 phores are more numerous than usual; they vary in number, but com- 

 monly 3 appear in line between the one process and the next one in line, 

 so that there are 3 nematophores on each side of each internode. 



Gonosome. — The gonangia are of fair size for the genus, oval or ob- 

 ovate, with a distinct, though short, pedicel. They appear singly or in 

 pairs in the axils of the hydrocladial processes in the proximal half of the 

 colony. 



Distribution. — Station 1106-40, off San Francisco Island, Gulf of 

 California, 43-44 fathoms; ^^ mile east of San Pedro Point, Santa Cruz 

 Island, 26-40 fathoms; 1 mile SW of Ben Weston Point, Santa Catalina 

 Island, 44-49 fathoms ; San Jaime Bank, off Cape San Lucas, 75 fathoms. 



