JAPANESE CHEILOSTOMATOUS ERYOZOA. 411 



with triangular mandible. Oœcia situated usually on certain internode 

 of terminal branches, large, semi-orbicular, rounded above, the lower 

 margin projecting like a curved penthouse ; surface smooth with faintly- 

 radiate lines and with a thin-walled area marked out from the base. 

 Rootlets given off by certain zoœcia from lateral wall near base. 



Fig. 2. Menipea sympodia, n. sp. 



A. Portion^of a branch at the bifurcation, showing peculiar frontal avicularia and 

 an oœcium. Frontal view, x 32. 



B. Same to show lateral avicularia and the position of projecting roctlcts. Dorsal 

 view, x 32. 



C. Mandible of frontal avicularium. x 160. 



D. Mandible of lateral avicularium. x 160. 



This new species is represented in the collection by a large 

 colony, obtained in the Sagami Bay, off the coast of Izu, from a depth 

 of about 250 fms. Remarkable are the delicate structure of the colony, 

 thejsympodial arrangement of the branches, and the peculiar trumpet- 

 shaped frontal avicularia, which characters may serve to easily dis- 

 tinguish the species. 



