PLATE XXXVI. 



Figs. 1-G. Edeinascidia turbinata, Herdman. 

 Figs. 7-11. Edeinascidia fusca, Herdman. 

 Figs. 12-14. Ecteinascidia crassa, Herdman. 



Fig. 1. A large colony of Ecteinascidia turbinata ; natural size. 

 Fig. 2. Three individuals from the same colony, showing the stolons ; natural size. 

 Fig. 3. Part of the branchial sac of Ecteinascidia turbinata, seen from the inside; mag- 

 nified (Hartn., obj. 4). 

 Fig. 4. Part of the circle of tentacles of the same species, showing three sizes (///., tn.' and 



tn.") ; magnified (Hartn., obj. 4). 

 Fig. 5. The viscera on the left side of the mantle in Ecteinascidia turbinata, showing the 



relations of the genital glands ; slightly enlarged. 

 Fig G. The dorsal part of the branchial sac of the same species, seen from the inside. 



showing the tentacular languets (/.) and the rudimentary connective ducts 



(c.d.) ; magnified (Hartn., obj. 4). 

 Fig. 7. Ecteinascidia fusca, seen from the right side ; natural size. 

 Fig. 8. Part of the branchial sac of Ecteinascidia fusca, seen from the inside ; magnified 



(Hartn., obj. 4). 

 Fig. !». A small part of the branchial sac of Ecteinascidia fusca; much enlarged 



(Hartn., obj. 7). 

 Fig. 10. Part of the dorsal region of the anterior end of the same branchial sac, showing 



the dorsal tubercle (d.t.), the prsebranchial zone, and three of the tentacles 



(tu.) ; magnified (Hartn., obj. 4). 

 Fig. 11. Part of the dorsal region of the branchial sac of Ecteinascidia fusca, showing 



the languets ; magnified (Hartn., obj. 4). 

 Fitr. 12. Ecteinascidia crassa ; natural size. 

 Fig. 13. Part of the branchial sac of Ecteinascidia crassa, seen from the inside ; 



magnified (Hartn., obj. 4). 

 Fig. 14. The internal longitudinal liars (id.) and their connecting ducts (c.d.), from the 



branchial sac of Ecteinascidia crassa; much enlarged (Hartn., obj. 5). 



