DOMOPORA STELLATA. 483 



both included under Johnston's T. truncata, and was able 

 to identify the one which Forbes had dredged in Shetland 

 with specimens of his own from the same locality. It 

 proves to be, as might have been expected from Johnston's 

 remarks upon it * and figure, very different from Domo- 

 pora stellata, and will now enjoy, we may hope, undis- 

 puted possession of the name originally conferred upon it. 



In D. stellata the zoarium adheres by an expanded 

 porous base, from which an erect subcylindrical stem rises, 

 which is sometimes short and stout, and dilates almost at 

 once into a capitulum, on the upper part of which the 

 zocecia are disposed in prominent lamelliform rays. In 

 certain stages a second capitulum is developed by budding 

 from the base or side of the first, and the zoarium be- 

 comes bilobate. By repeated gemmation it takes on 

 a clustered form, many short processes, each bearing 

 a number of celliferous capitula, being united in one 

 composite structure (Plate LXIII. fig. 10). In proli- 

 ferous specimens of this kind, the " stars " or cell-bear- 

 ing capitula may number from 7 to 13 or even 16 (Sars). 

 In Mr. Peach's finest specimen there are 15. The stars 

 are much crowded together on the separate lobes, one lobe 

 bearing as many as seven. The lamellae are subtriangular 

 in form and stand out very prominently. The boundaries 

 of the cells, which are ranged in two or three series, are 

 visible on the sides, and give them a lineated appearance. 



The habit in the proliferous form, which I have just de- 

 scribed, is dwarf and stunted ; the lobes supporting the 

 capitula are extremely short and can hardly be called 

 brunches. But the species sometimes assumes a very dif- 

 ferent form : the stem is much elongated by successive 



* ' British Zoophytes,' p. 271 (after the paragraph from Fleming) and 



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