PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 



149 



71. Corella japonica var. asaniusi Oka 



Figure 57 



CorcUa japonica var. asaniusi Oka, 1927a, p. 492, fig. 948. — Oka, 1931b, p. 198. — 

 Oka, 1935, p. 458. 



MATERIAL EXAMINED 

 Japan: Hokkaido Island, Hakodate; E. S. Morse, coll. Oue specimen (USNM 

 11695). 



Desckii^ion. — A single specimen was presented to the U.S. National 

 Museum from Tokyo Imperial University, Japan. The specimen is 

 a flat mass measuring 40 mm. by 31 mm. in extent and 7 mm. in thick- 

 ness. Test rather hard, gelatinous, translucent, faintly milky white, 

 reddish-brown musculature visible through test. Surface mostly 

 covered with mud. Branchial aperture terminal; atrial aperture 

 situated at level of anterior quarter of body length. ISIuscles much 

 more numerous than in typical specimens described previously (fig. 

 57) . Inner longitudinal vessels 30 on right, 32 on left side. Transverse 

 rows of infundibula about 30. Longitudinal vessels supported in most 

 parts by papillae on transverse vessels and median intermediate 

 papillae. 



Figure 57 .—Corella japonica Hcrdman var. asaniusi Oka: left side of inaiule body, showing 

 stronj,'ly developed musculature. 



