REPORT ON PHILIPPINE HYDROIDA 219 



and gonosome, it seems best to give a detailed description of the 

 species here in spite of some repetition so far as the trophosome is 

 concerned. 



Trophosome. — Colony growing as a parasite on a plumularian 

 hydroid, Aglaophenia triramosa Nutting, over which it has ramified 

 extensively. Hydrocaulus in the form of a creeping root stalk from 

 which straight branches or hydrocladia arise at irregular intervals 

 and attain a height of about 3 cm. There is a slight constriction be- 

 low each pair of hydrothecae. Hydrothecae in pairs, tubular, grace- 

 fully bent outward to their distal ends, about two-thirds of their 

 length being adnate to the branch. The bend is not angular but 

 forms an even graceful curve. Aperture almost horizontal, and, 

 therefore, opening upward, with a distinct operculum composed of 

 a single adcauline flap which fits down below the hydrothecal mar- 

 gin on the abcauline side. The hydranths are not sufficiently well 

 preserved for description. 



Gonosome. — Gonangia arranged in a single row along one side of 

 the branches. They are quite ornate in appearance and very un- 

 symnietrical and their extreme transparency renders description ex- 

 traordinarily difficult. Those on our specimen contain ova in what 

 appears to be an internal marsupium. A front view shows a long 

 central hornlike leaf about three-fourths the length of the entire 

 gonangium, and two very broad flattened leaves, with upper edges 

 with five or six irregular and somewhat jagged projections or teeth 

 to each leaf. Focusing lower, one can see on the opposite side a thick 

 hornlike process which probably represents a leaf, and another simi- 

 lar one curving in the opposite direction, the two seeming to embrace 

 the marsupium. In a side view the gonangia appear much more 

 slender showing an anterior long slender horn, a posterior short 

 stouter and more curved one, and lateral leaves, one on each side with 

 their jagged edges. These are much narrower in this point of view. 

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

 kong, 21° 33' N., 116° 13' E. Station 5311, China Sea, vicinity of 

 Hongkong, 21° 33' N., 116° 15' E.; depth, 88 fathoms. 



Distribution. — The type was presumably from the eastern coast of 

 South Africa. 



DIPHASIA INORNATA, new species 



Plate 43, fig. 1 



Trophosome.— Colony pinnate, stem simple, total height 7y 2 cm., 

 spread Sy 2 cm. Stem divided into irregular internodes, almost 

 straight, although very slightly flexuose with a tendency to bearing 

 two branches to each internode. Proximal 1 cm. without hydro- 

 thecae. The branched portion bears one hydrotheca above, one below 

 and one opposite each branch. Branches alternate, constricted at 



