44 UNITED STATES NATIONAL MUSEUM BULLETIN 251 



Figure 12.— a, c, d, Amaroucium constridum Sluiter: a, entire colony; c, right side of 

 thorax of a zooid; d, right side of abdomen of same zooid. b, e, f, Amaroucium glabrum 

 Verrill: b, colony from Albatross sta. 4993, near Hokkaido Island, Japanj g, proximal 

 portion of rectum in a zooid of the colony from Okhotsk Sea;/, right side of embryo 

 from the colony from Albatross sta. 4993. 



