24 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



black, in some of the preserved specimens. Sporosacs numerous, as many 

 as 10, forming a dense cluster around the distal half of the zooid; 2 to 

 4 ova in each sporosac. 



No male specimens were obtained. 



Other zooids. — Dactylozooids numerous, forming almost a continu- 

 ous row in some places at the margin of the colony. 



Spines. — Spines are numerous, rather small, slender, tapering to the 

 point, slightly rough at the margins. 



Distribution. — Santa Elena Bay, 7-12 fathoms. 



Hydractinia quadrigemina, new species 

 Plate 5, Fig. 22 



Trophosome. — Colony growing on the surface of a gastropod shell; 

 largest nutritive zooids 2.5 mm., with 15 or 16 tentacles. 



Gonosome. — Female generative zooids somewhat smaller than the 

 nutritive, with tentacles well developed but not numerous, 6-8. Usually 

 there is but one sporosac, although a small one may appear opposite the 

 fully developed one, a short distance below the base of the tentacles. 

 Sporosacs large, spherical, with four large ova. 



No male specimens observed. 



Other zooids. — None observed. 



Spines. — The spines are conspicuous but not very numerous; they 

 may reach a length of nearly 1.0 mm.; smooth, tapering very gradually, 

 slightly curved. 



Distribution. — Off Isabel Island, 10-25 fathoms. 



Genus PODOGORYNE 



Podocoryne reticulata, new species 

 Plate 5, Fig. 23 



Trophosome. — Individual zooids arise from a stolon that follows 

 the groove between successive whorls in the shell of a gastropod ; the 

 whorls are ribbed and cross connections of the stolon lie almost entirely 

 in the sulcus formed by the ribbing. The nutritive zooids are small, 

 about 0.7 mm., with 10-12 tentacles. 



Gonosome. — The generative zooids are but little smaller than the 

 nutritive zooids and the number of tentacles is but slightly reduced, 

 6 or 7. The medusa-buds are borne just below the tentacles; there is 



