PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 



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Figure 64. — Boirylloides violaceus marginal us, new subspecies: a, lobe of larger colony; 

 b, two pairs of zooids from a system; c, small gonad on right side. 



are alive (fig. Q-ia). Usually a pair of yellowish pigments near distal 

 end of atrial languet (fig, 64&), Stigmatal rows 12-14 on right, 12-1^^ 

 on left side, posterior-most row often rudimentary. Dorsal edge of 

 second row does not reach median line. From 8 to 9 rows exposed 

 through a huge atrial opening. Up to 15 stigmata in each row on 

 each side of body; arranged roughly (D = dorsal, V^ ventral) : D 3 

 (1) 4 (1) 3 (1) 4V. Tentacles 8, larger and smaller ones alternate 

 regularly. Ciliated groove a minute oval opening. Situation of ante- 

 rior margin of intestinal loop varies from 12th transverse vessel to mid- 

 dle of 11th stigmatal row; that of anus fhictuates fi'om 11th to 10th 

 transverse vessel. Stomach located behind branchial sac, with 8 

 longitudinal plications besides typhlosolis. Some zooids from smaller 

 colony have small gonads situated near middle of body at level of 

 posterior margin of branchial sac, just at position of cardiac end 

 of stomach on right side, and at level of lOtli transverse vessel on 

 ventral left side, just along nnterior mai-gin of intestinal loop. 



