PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 



27 



Figure 3. — Jplidiuvi spilzbergense Harlmcycr: a, right side of ihorax; /;, situation of 

 atrial languet anterior to dorsal ganglion; c, abdomen and proximal half of the post- 

 abdomen; d, distal half of postabdomen; e, ciliated groove;/, frontal view of stomach. 



.smaller one includes only a small number of damaged zooids. Both 

 colonies are encrusted heavily with fine, black sand grains. 



Test soft and gelatinous, containing a large number of fine, black 

 sand grains. System of zooid arrangement is not discernible at sur- 

 face. Zooid length averages about 4 mm. in a contracted state, ex- 

 cluding postabdomen. Thorax and abdomen iieary equal in length. 

 Postabdomen rather short in some zooids, but reaching 1.5 times the 

 length of abdomen in others. In extended state zooids would be 



20G-191— 67 3 



