REPORT ON PHILIPPINE HYDROIDA 233 



also bears hydrocladia, but has no evident nodes. Branches fascicled 

 basally, simple distally, and without evident internodes. Hydro- 

 cladia springing from one side of the branchlets, alternate, growing 

 at a rather sharp angle from the branchlet; divided into regular 

 internodes each bearing a hydrotheca. Hydrothecae separated by 

 about one-fifth of their height, deep, subcylindrical, margin some- 

 what everted and without teeth except a small but evident one in 

 front. The lateral parts of the margin are undulatory, but without 

 definite teeth. There is a small chitinous interior strap in each inter- 

 node below the supracalycine nematophores and another near the 

 bottom of each hydrotheca. Nematophores — supracalycine nemato- 

 phores rather large, their openings rising above the top of the hydro- 

 theca and their margins cut away on the adcauline side. Mesial 

 nematophores are stout and their margins do not quite attain the 

 height of the middle of the hydrotheca. Their outer profile is quite 

 straight. Cauline nematophores in a row on the main stem opposite 

 the side from which the branches spring, there is also a row of hydro- 

 thecae scattered among these nematophores. 



Gonosome. — Gonangia borne in closed corbulae which are modi- 

 fied hydrocladia borne on the branchlets. They are about 8 mm. long 

 and l 1 /^ mm. in width, tapering gradually distally, composed of 

 about 16 pairs of corbula leaves, most of which meet above although 

 the distal ones do not. There are no hydrothecae at the bases of the 

 corbula leaves, but there is a large nematophore at each leaf base. 

 The rest of the nematophores are very minute and inconspicuous, 

 there being a row of six or eight on the edge of each leaf. There are 

 usually two or three hydrothecae on the hydrocladium between the 

 corbula and branch from which it arises. 



Localities. — Dredging station 5310, China Sea, vicinity of Hong- 

 kong, 21° 33' N., 116° 13' E.; depth, 100 fathoms. Station 5311, 

 China Sea, vicinity of Hongkong, 21° 33' N., 116° 15' E.; depth, 

 88 fathoms. Station 5312, China Sea, vicinity of Hongkong, 21° 

 30' N., 116° 32' E. ; depth, 140 fathoms. 



The peculiar manner of branching and the extremely minute nema- 

 tophores on the corbulae are good diagnostic features of this species, 



Holotype.—C&t. No. 42189, U. S. N. M. 



LYTOCARPUS PHOENICEUS (Busk) 



Plumularia phoenicea Busk, Voyage of the Rattlesnake, 1852, vol. 1, p. 398. 

 Aglaophcnia phoeniceus Bale, Australian Hydroid Zoophytes, 1884, p. 159, 



pi. 17, figs. 1-4; pi. 19, fig. 31. 

 Lytocarpus phoeniceus Bale, The Genera of the Plumularidae, etc., 1887, 



p. 15. 



The specimens collected on the Philippine cruise of the Albatross 

 agree very exactly with the detailed description and excellent figures 



