30 UNITED STATES NATIONAL MUSEUM BULLETIN 251 



present specimen. However, the esophagus is much longer in the 

 present species than in Redikorzev's species, with the result that the 

 stomach is located more posteriorly, and it is evidently wider than 

 long compared with the elongated stomach of A. fragile. The colony 

 of A. fragile is encrusted with sand grains over the surface. These 

 differences seem to be too remarkable to be regarded as the result of 

 the contraction of specimens or as temporal features due to special 

 ecological or physiological conditions. Thus the present specimens 

 are here treated as a distinct species and named after the locality. 



5. Ainaroucium constellatum Verrill 



Amouroncinm constellatum Verrill, 1871b, p. 359. 



Amaroucium constellatum Van Name, 1945, p. 38, fig. 8 ; pi. 8, fig. 1.— Tokioka, 

 1951a, p. 2, pi. 1, figs. 2-4. 



MATERIAL EXAMINED 

 Japan: Hokkaido Island, Hakodate, E. S. Morse, collector. One colony 

 23 mm.XlT mm. in extent and about 10 mm. in thickness, attached to coarse 

 sand grains and pebbles (USNM 11694). 



Description. — Test gelatinous, rather hard to the touch; surface 

 irregularly elevated and depressed, but quite free from foreign in- 

 clusions. The basal part covered with many small algae. The system 

 of zooid arrangement obscure, probably because of strong contraction. 

 Stigmatal rows 13, with about 13 stigmata in each row. Dorsal lan- 

 guets displaced to left side from dorsomedian line for the distance of 

 three stigmata. About 25 longitudinal plications on stomach. 



6. Amaroucium glabrum Verrill 



FiGUBES 5 ; 126,e,/ 



Amouroucinm glahrum "Verrill, 1871a, p. 288, figs. 20-22. 



Amaroucium glahrum Van Name, 1945, p. 31, fig. 4; pi. 1, fig. 5.— Tokioka, 1951a, 

 p. 1, pi. 1, fig. 1. 



MATERIAL EXAMINED 



Sakhalin (Karafuto) Island: In Okhotsk Sea, off Cape Patience; Albatross 

 sta. 5025. One colony, an ovoid mass, 10 mm. X 6.5 mm. in extent (USNM 11741). 



Japan : West coast of Hokkaido somewhat north of Otaru ; Albatross sta. 4993. 

 One roughly cylindrical colony 12 mm. long and 5 mm. in diameter, attached to 

 a large tuft of dead hydrozoan colonies, together with sponges (USNM 11778).— 

 Otaru, west coast of Hokkaido ; E. S. Morse, collector. Seven colonies attached 

 below to coarse sand grains ; largest colony 30 mm.Xl6 mm. in extent, maximum 

 thickness 3 mm. ; probably the colonies were thicker than 3 mm. when alive and 

 fully extended (USNM 11691).— Tsugaru Strait, off Cape Tsiuka: Albatross sta. 

 4808. Two encrusted colonies, the larger one 13 mm. X 8.5 mm. in extent and 

 1.5 mm. in thickness; the smaller 11 mm.X4 mm. (USNM 11632). 



Description. — Test gelatinous, translucent, yellowish white. Sur- 

 face smooth and quite free from any foreign matter in specimens from 

 Otaru (11691), but in others it is mostly encrusted in various degrees 



