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has not much bearing on the question at issue if, as I think, the determination of the species 

 is uncertain. 



It may be admitted that the synonymy of this species is doubtful. I have preferred to 

 describe the 'Siboga' specimens as T. pulckerrima, as I am quite satisfied that they belong 

 to the species so named by Kirkfatrick in 1890. But it is not impossible that it should 

 with more propriety be referred to T. interjuncta MacGillivray, 1S86 or to T. radicata 

 Kirkpatrick, 1S88. 



The following notes may be added with regard to the specimens in the Cambridge 

 Collection which are considered to belong to the present species : — 



Torres Straits. Ovicells are not present. The zooecia are robust, and the 



branches show no cross-connexions. Basal rooting columns are present. 



Singapore. — A very typical specimen, with cross-connexions and rooting columns. 

 Ovicells, resembling those shown in fig. 4, are present, but they have produced no ooeciostomes. 

 It may be inferred that development of the embryos had not proceeded normally. 



C e y 1 o n (determined by Miss Thornely as I. mi/neana). — Two small fragments 

 with ovicells. The ooeciostomes, of which two are visible, do not show the urn-like shape of 

 those of the 'Siboga' Collection. A basal rooting column is present, but no cross-connexions 

 are visible. 



Lifu, Loyalty Is (determined by Miss Philipps as I. interjuncta). — 4 slides, one 

 of which shows ovicells and typical cross-connexions. The ooeciostomes are intermediate in 

 character between those of the 'Siboga' specimens and those from Ceylon. Basal rooting 

 columns occur. 



Oueensland. — Fragments, without cross-connexions, rooting columns or ovicells, 

 but probably belonging to the present species. 



Japan, Owston Collection (49. K., 7. S. + 15. B.). — Fragments, with ovicells showing 

 urn-shaped ooeciostomes precisely like those of the 'Siboga' specimens. Rooting columns are 

 present, but no cross-connexions. 

 Measurements, in u. : — 



Diameter of left branch, fig. 4, on the proximal side of the ovicell, 700 ; 

 Diameter of left branch, fig. 4, on the distal side of the same ovicell, 500 ; 

 Diameter of the distal end of the same ovicell, 1,100; 

 Length of its inflated part, 2,000; 



Diameter of the inflated part of its ooeciostome, 210; 

 Diameter of the ooeciopore, 255; 

 Diameter of the zooecia, 180 — 200 ; 

 Diameter of the orifices, about 1 So ; 



Greatest width of the branch, between the zooecia, fig. 5, 1,000 ; 

 Greatest width of the ovicell, fig. 2, 3,200; 

 Width of the ooeciopore, fig. 1, 280 ; 



Width of the rooting column, near its origin, fig. 3, 220; 

 Length of the same rooting column, 3,400; 



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