REPORT ON PHILIPPINE HYDROIDA 207 



gia, on the same colony as the others, is borne on the main fas- 

 cicled stem. They are very much larger than the first kind, one of 

 them measuring 3.1 mm. in length and 1 mm. in diameter. The 

 walls are also much thicker and distinctly brownish yellow in color, 

 like the thick chitin of the fascicled stem. They are considerably 

 flattened distally and the "A" of the operculum is sharply pointed. 

 Their contents are not sufficiently well preserved for description, 

 but they have the appearance of containing old blastostyles from 

 which the contents have escaped. One of these gonangia bears 

 gonads which appear to be male and show no medusoid characters 

 whatever. The two kinds of gonangia do not appear to intergrade, 

 although each varies considerably in size. 



This curious dimorphism of the gonangia has not been described 

 before, so far as I know, in the Campanulinidae, nor indeed have I 

 encountered it in the hydroids. Of course, there are forms with 

 colonies bearing both male and female gonads, but I have not seen 

 such a striking differenece in the gonangia of a single colony. 



Locality.— The holotype, Cat. No. 42174, U.S.N.M., was dredged 

 at station 5117, Balayan Bay and Verde Island Passage near Som- 

 brero Island, 13° 52' 22" N., 120° 46' 22" E. ; depth, 118 fathoms. 

 This remarkable form is nearest to my Stegopoma gilberti 10 from 

 which it differs in having many of the pedicels extensively annulated, 

 in the shape of the proboscis, and in the two kinds of gonangia many 

 of which are much larger than the hydrothecae instead of usually 

 being shorter as in /S. gilberti. 



Family HEBELLIDAE 



HEBELLA CONTORTA Marktanner-Turneretscher 



Hebella contorta Marktanner-Turneretscher. Die Hydroiden des k. 

 k. naturhistorischen Hofmuseums, 1890, p. 215. 



This species is reported by the original describer and also by 

 Doctor Hargitt as occurring on Idia pristis, and is parasitic on 

 that species in the Albatross material which forms the basis for 

 this paper. The hydrothecae vary greatly, sometimes being almost 

 straight cylinders, but many having the twisted appearance reported 

 and figured by Marktanner-Turneretscher. 



Locality. — Dredging station 5146, Sulu Archipelago near Sulade 

 Island, 5° 46' 40" N., 120° 48' 50" E.; depth, 24 fathoms. 



Distribution. — Type from Singapore Museum. Keported from 

 Philippines also by Doctor Hargitt. 



10 Hydroids of the Hawaiian Islands. I'. S. Fish Commission Bulletin for 1903, pt. 3. 

 p. 943, Dec. 23, 1905. 



