W. G. Van Name — Bermuda Ascidians. 407 



Figure 70. — Styela partita, var. nov. bermudensis. Part of the branchial sac 

 from near the middle of the body extending from the endostyle to the 

 dorsal lamina. x 10. (Taken from the specimen shown in figure 72.) 

 Page 388. 



Figures 71 to 75 inclusive. — Styela partita, var. nov. bermudensis. Five indi- 

 viduals, showing the outlines of the body when removed from the test, the 

 alimentary canal and the reproductive organs of the left and right sides. 

 xl%. Page 388. 



Plate LVI. 



Figures 76, 77 and 78. — Styela partita (Stimpson) from Wood's Hole, Mass. 

 Three individuals, showing the outlines of the body when removed from 

 the test, the alimentary canal and the reproductive organs of the left and 

 right sides, x 1%. Page 389. 



Figure 79. — Microcosmus miniatus Verrill. Tentacle, x about 36. Page 396. 



Figure 80. — Ascidia curvata Traustedt. Small part of the branchial sac show- 

 ing part of the doi'sal lamina. From the posterior part of the body, x 40. 

 (h. in. — horizontal membrane of transverse vessel.) Page 400. 



Figure 81. — Ascidia curvata Traustedt. Small individual seen from the right 

 side showing the outline of the test and the muscle bands of the mantle ; 

 also the papillae of the branchial sac. The alimentary canal and repro- 

 ductive organs, situated on the left side, are visible through the transparent 

 tissues, x 4. Page 400. 



Figure 82. — Ascidia curvata Traustedt. Antei'ior end of the dorsal lamina and 

 adjacent part of the branchial sac, dorsal tubercle and part of the, tentacles, 

 x 20. (h. ?n.=horizontal membrane of transverse vessel.) Page 400. 



Figure 83. — Halocynthia rubrilabia Verrill. Tentacle, x about 36. Page 393. 



Figure 84. — Halocynthia riiseana (Traustedt), var. nov. munita. Tentacle, 

 x about 36. Page 394. 



Plate LVII. 



Figure 85. — Halocynthia riiseana, var. nov. munita. Small piece of the branch- 

 ial sac from one of the spaces between two folds near the middle of the 



body, x 24. Page 394. 

 Figure 86. — Halocynthia rubrilabia Verrill. Outline of individual (removed 



from the test) showing alimentary and reproductive organs of both sides. 



xl%. Page 393. 

 Figure 87. — Halocynthia riiseana var. nov. munita. Outline of individual 



(removed from the test) showing alimentary and reproductive organs of both 



sides, xlig. Page 394. 

 Figui-es 88 and 89. — Polycarpa obtecta Traustedt. Two polycarps. The ovaries 



are not fully ripe, and the eggs and ovaries themselves are small, x 32. 



Page 386. 

 Figure 90. — Halocynthia rubrilabia Verrill. Small piece of the branchial sac 



from one of the spaces between two folds near the middle of the body. 



x 24. Page 393. 



