14 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



annulated. The hydranths appear on pedicels that may be as short as 

 the hydranths themselves; the pedicels are distinctly annulated through 

 quite a portion of their length. Occasionally branching takes place, in 

 which case the main stem becomes more elongated. The hydranths are 

 large, up to 2 mm. in length, with numerous rather slender capitate 

 tentacles, quite evenly scattered over the whole surface. 



Gonosome. — The sporosacs appear between the tentacles near the 

 base of the hydranth. 



Distribution. — Creeping over coralline at low tide, on Black Beach. 



This species bears some resemblance to Coryne crassa Fraser, but 

 is not so much inclined to branch. The hydranth is not so stout and 

 the tentacles are more numerous and much more slender. 



Genus GORYNITIS 



Gorynitis agassizii McCrady 



Corynitis agassizii McCrady^ Gymno. Charleston Har., 1859, p. 30. 



Distribution. — On sponge at low tide, Wenman Island; Jicaron 

 Island, 30 fathoms. 



Genus EUGEMMARIA, new genus 



Trophosome. — Zooids, like those of Gemmaria, grow from a strongly 

 dendritic, reticular, or vesicular, chitinous support, which evidently is 

 part of the colony. 



Gonosome. — Gonophores produce sporosacs. 



Eugemmaria dendritica, new species 

 Plate 2, Fig. 7 



Trophosome. — Colony reaching a height of 7 cm., strongly branched, 

 commonly dichotomously, the branched colony being almost as broad 

 as it is high. The chitinous portion seems to be made of tube-like struc- 

 tures with cross partitions. The hydranths look like those of Gemmaria 

 gemmosa; sessile, elongate when extended, with numerous short, strongly 

 capitate tentacles arranged in more or less regular whorls. 



Gonosome. — Globular or oval sporosacs, with very short pedicels, 

 spring from the framework without regularity of position or definite 

 relation to the nutritive zooids; greatest length 0.4 mm. 



Distribution. — White Friars Islands, 25 fathoms; east of islands 

 off Navidad Head, 25-35 fathoms. 



