PLATE 43 



Figs. 46-49, Botrylloides diegensis. 

 Fig. 46. Zooid much enlarged, viewed from left side. 

 Fig. 47. Same viewed from dorsal side. 



Fig. 48. Branchial tentacles, hypophysis, ganglion and gland. 

 Fig. 49. Colony of Botrylloides diegensis. Natural size. 



Figs. 50 and 51, Diplosoma pizoni. 

 Fig. 50. Zooid much enlarged, viewed from right side. 

 Fig. 51. Portion of pigmented epithelium of the mantle which covers the 



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