270 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



internode, there are 3 slightly oblique nodes, the distal one of which forms 

 the proximal boundary to the first thecate internode. The 2 internodes 

 bounded by these nodes are quite short, and each is provided with a 

 nematophore. There are no nodes in the remainder of the proximal half 

 of the stem. There are 8 internodes in the distal portion, separated by 

 nodes that are not strongly marked ; there are 3 partial septa to each in- 

 ternode, 1 at the base of the supracalycine nematophore, 1 at the base of 

 the hydrotheca, and 1 a little nearer to the base of the hydrotheca than to 

 the base of the nematophore. The hydrotheca is long and slender, with its 

 length more than twice the greatest breadth, the diameter increasing from 

 base to margin ; there is a prominent, sharp tooth medially placed on the 

 face of the margin, and the remainder of the margin is irregularly waved 

 or slightly toothed. The supracalycine nematophore is not large, scarcely 

 reaching the margin of the hydrotheca; the mesial nematophore is not 

 adherent to the face of the hydrotheca, but is attached to the internode a 

 short distance below the base of the hydrotheca. 



Gonosome. — Not observed. 



Distribution. — Station 1307-41, 2.8 miles WNW of Long Point, 

 Santa Catalina Island, 64-88 fathoms. 



Remarks. — If a mature colony of this species retains the type of 

 growth shown in this immature colony, a new genus should be established 

 for the species, bearing a relation to Cladocarpus much similar to that of 

 Antennella to Plu7nularia, but until a mature colony is obtained to settle 

 the matter, the species is placed provisionally with Cladocarpus. 



The hydrotheca is somewhat like that of C. vancouverensis Fraser, 

 but it is more slender; the internode bearing it is much less extensively 

 septate, and the mesial nematophore is quite separate from the base of the 

 hydrotheca. 



Cladocarpus moderatus, new species 

 Plate 36, Fig. 40 



Trophosome. — Colony, 4 cm, is smaller than that in the most of the 

 American species of the genus; the stem is unbranched, but is slightly 

 fascicled in the proximal portion. The hydrocladia appear in regular al- 

 ternation but not quite in the same plane; they are somewhat flexuous, 

 the bend taking place in the vicinity of the nodes. There is a slight curve 

 backward at the distal end of the hydrotheca, followed by a bend forward 

 that extends past the node, which is oblique; the beginning of the next 



