THE PHILIPPINE 



Journal of Science 



D. General Biology, Ethnology, 

 AND Anthropology 



'-' Jiiu?^'>- 



Vol. VIII OCTOBER, 1913 No. 5 



THE MORPHOLOGY OF EUDENDRIUM GRIFFINI SP. NOV. 



By S. F. Light 



(From the Department of Zoology, College of Liberal Arts, University of 



the Philippines) 



Two plates and 5 text figures 



Eudendrium gfriffini sp. nov. 



Trophosome. — Hydrocaulus nonfascicled, irregularly branched, 

 more or less recumbent, attaining a length of 35 mm. or more 

 and a height above the hydrorhiza of from 10 to 20 mm. ; pedicels 

 long, varying from 6 to 13 mm. in length and sometimes show- 

 ing from 2 to 6 more or less perfect annulations just above point 

 of junction with hydrocaulus ; diameter of hydrocaulus, 0.17 mm. 

 Hydrorhiza resembling hydrocaulus, sometimes anastomosing 

 to form a network over surface of support, rooted by short 

 processes characterized by a cap of enlarged ectoderm cells, 

 Perisarc, 1.5 to 3 (i/m in thickness; color of perisarc over entire 

 trophosome, transparent white to light yellow. Male hydranths 

 and sexually immature or sterile female hydranths long, slender, 

 and vase-shaped, varying in length from 2 to 3.5 mm.; fertile 

 female hydranths shortened and thickened and often atrophied; 

 all hydranths with a "sense ring" near proximal end consisting of 

 2 zones of enlarged glandular ectoderm separated by a groove; 

 tentacles, 50 to 70 in 2 or 3 closely appressed rows, directed 

 distally so as to hide the hypostome, and bearing numerous small 

 nematocysts in groups of 2 or 3; hypostome short and slender, 

 distinctly trumpet-shaped; when extended, about 0.35 mm. in 

 height and 0.18 mm. in diameter at widest point, with a zone of 

 large nettling cells near the distal end. 



120986 333 



