REPORT ON PHILIPPINE HYDROIDA 237 



is small but plainly seen. Nematophores, mesial nematophores are 

 large for this genus, not attaining the level of the margin of the 

 hydrotheca, margin finely crenulated and incomplete behind, where 

 the nematophore appears to be obliquely beveled. Supracalycine 

 nematophores just about reaching the level of the hydrothecal rim. 

 projecting outward rather than upward and with a broad everted 

 margin somewhat like the lip of a pitcher. Cauline nematophores 

 are borne on the hydrocladiate tube of the stem. 



Gonosome. — The gonangia are inclosed in a corbula in which the 

 leaves are united as in the genus Aglaophenia, but there is a hydro- 

 theca at the base of each leaf as is characteristic of Thecocarpus. 

 The corbula is extraordinarily long and slender (10 mm. long and 1 

 mm. in diameter) composed of about 24 pairs of leaves, each with a 

 hydrotheca at its base and bearing a row of six to eight nemato- 

 phores on its edge. Nematophores tubular with the margin having 

 a deep sinus or bay cut away on one side. These corbulae are really 

 modified hydrocladia having two or three normal hydrothecae on 

 the proximal part between the stem and corbula. 



Localities. — Dredging station 5134, Sulu Archipelago, Balukbaluk 

 Island, 6° 44' 45" N., 121° 48' E.; depth, 25 fathoms. Station 5335, 

 Linapacan Strait, Observatory Island, 11° 37' 15" N., 119° 48' 45" 

 E. ; depth, 46 fathoms. 



Holotype.— Cat. No. 42185, U.S.N.M. 



The writer takes pleasure in naming this species after the veteran 

 Australian naturalist and authority on the Hydroida, W. N. Bale. 

 This species is nearest Aglaophenia calycifera Bale but is without 

 the cap-like sarcothecae which Bale regards as a diagnostic feature. 29 



HALICORNARIA HIANS (Busk) 



Plumularia hians Busk, Voyage of the Rattlesnake, 1852, vol. 1, p. 396. 

 Halicornaria Mans Bale, Australian Hydroid Zoophytes, 1884, p. 179. 



Our specimens correspond quite closely with the figures and des- 

 cription given by Bale. 



Locality. — Dredging station 5321, China Sea, vicinity of Formosa, 

 Ibugos Island, 20° 19' 30" N., 121° 51' 15" E.; depth, 26 fathoms. 



Distribution. — Prince of Wales Channel, Torres Strait (Busk) ; 

 Sagami Sea, Japan (Inaba, according to Stechow). 



HALICORNARIA TENUIROSTRIS, new species 



Plate 47, figs. 3, 4 



Trophosome. — Colony plumose, 11 cm. high and with a spread of 4 

 cm. Stem not fascicled, divided into irregular internodes, giving 

 off alternate closely approximated hydrocladia. The nodes are 



20 Hydroids collected in the Great Australian Bight, pt. 2, 1914, p. 178. 



