100 OKHAMANDAL MARINE ZOOLOGY REPORT— PART II 



cladi sharp-pointed, approximately equal in length, about 0-07 by 0-0086 mm. ; 

 prolongation of shaft sharp-pointed and almost equal in length to cladi; cladi 

 sometimes irregular. 



(6) Anatrisenes ; cladi sharply recurved, sharply pointed ; occasionally split 

 at the apex into two almost parallel branches. Dimensions much the same as 

 for protriaenes but shaft rather more slender. 



(7) Sterrasters ; of normal form, with well-marked hilum ; elliptical, measuring 

 about 0-08 by 0-065 mm. 



(8) Subcortical spherasters, with numerous fairly long, sharp-pointed rays, 

 total diameter about 0-012 mm. Not sharply distinguishable from (9). 



(9) Oxyasters ; with few or fairly numerous, slender, perhaps faintly roughened 

 rays ; total diameter varying up to about 0-05 mm. 



(10) Minute chiasters or strongylospherasters of the dermal layer, about 0-006 mm. 

 in diameter. 



Previously known Distribution. Japan (Thiele, Lendenfeld, Lebwohl). 

 Register Number and Locality. XV. 1, three miles W.N.W. of Samiani Light- 

 house, 17 fms., 22.12.05. 



5. Donatia seychellensis (Wright). 



Alemo seychellensis Wright [1881]. 

 Tethya seychellensis Sollas [1888]. 

 Tethya seychellensis Keller [1891]. 

 Tethya seychellensis Topsent [1893]. 

 Tethya ingalli (pars) Lindgren [1898]. 

 Tethya seychellensis Kirkpatrick [1900]. 

 Tethya lyncurium var. c. Dendy [1905]. 

 Donatia Ingalli Topsent [1906]. 

 Donatia Ingalli (pars) Hentschel [1909]. 

 Tethya seychellensis Eow [1911]. 

 Donatia seychellensis Dendy [1916]. 



The three specimens in the collection agree so closely with those obtained by 

 the Sealark Expedition in the Indian Ocean and dealt with by me in my Report 

 [1916] that it is unnecessary to describe them in this place. Two of them 

 (R.N. XXVI. 8 a, b) are well provided with buds and are also remarkable for the 

 presence of immense numbers of oscillatorian algae in the cortex, which I have 

 rarely seen before in a Donatia. In all' the specimens the sex-radiate condition of 

 the tylasters and large oxyasters is very strongly pronounced though by no 

 means, constant, and the latter frequently have branching rays. 



Previously known Distribution. Seychelles (Wright); Samboangan (Sollas); 

 Flinders Passage, Torres Straits (Sollas) ; Red Sea (Keller, Row, Topsent) ; ? South 



