PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 



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Figure 101. — Molgula {Molgula) xenophora Oka: a, dorsal side of animal; b, left side of 

 mantle body; c, right side of same; d, neural area surrounding dorsal ganglion; e-g, cil- 

 iated grooves of 42, 40, and 34 mm. individuals, respectively; /;, part of liver, magnified. 



left side) in posterior half. Longitudinal muscles inside transverse 

 muscle pieces; muscles converging at atrial a])erture all perfect, those 

 gathering at branchial aperture widely interrupted. Area surround- 

 ing dorsal ganglion wholly covered with fine transverse muscles (fig. 

 IQld). Kidney sac in posterior part of body with anterior end at 

 level of frontal margin of atrial aperture. 



In l)ranchial sac seven plications present on each side. Inner 

 longitudinal vessels arranged (D = dorsal, V = ventral): 



34 mm. long specimen 

 Loft 1) (12) (14) (1.^)) (15) {V,\) {\?>) ( 9) V 

 Right 1) 1 (i;3) (11) (14) {) (15) (15) (15) (13^ V 



