113 



or less of a rounded figure, though locomotive power rather 

 active, homogeneous, of a slightly bluish tint; inner cells 

 orbicular or sub-elliptic, minute, walls not definitely percep- 

 tible ; contents hyaline ; nucleus {?) varying from yellow to red, 

 sharply bounded ; nucleolus (?) dark, very minute; pseudopo- 

 dia very slender, varying in length, but averaging from about 

 that of the diameter of the body to about one half straight, 

 linear, hyaline, unbranched, radiating in many directions, and 

 then sometimes crossing each other, but not inosculating. 



Measurements. — Size of examples variable. Diameter of 

 inner bodies about — ,tVo"* 



Localities. — Pools in Gallery and Carrig neighbourhoods 

 (Co. Wicklow), very sparingly ; rare. 



Affinities and Differences. — Distinguished from preceding 

 at once by the salient characters alluded to under this head- 

 ing folloAving the description of C. Haeckeliana. As men- 

 tioned imder the similar paragraph following the description 

 of Acanthocystis Pertyana, it "svill be seen that I hokl like 

 doubt but that form is identical with Greef^s iig. 29 (h c), 

 to which I have already adverted. This form is not named 

 by Greef ; hence it has no synonym. 



Having made several allusions in the foregoing to Greef's 

 new genus Astrodisculus, and as he likewise in his recent 

 valuable paper makes some observations upon Clathndina 

 (Cienkowski), a short resume of those portions of his commu- 

 nication may^ be of some advantage. 



In bringing forward the genus Astrodisculus, hoAvever, 

 he does not give, as yet at least, diagnostic characters ; but 

 as I glean them from his general account of the forms he 

 refers thereto, I believe they are something like the fol- 

 lowing : 



Genus, Astrodisculus (Greef ).^ 



Body" of tAvo distinct Avell-marked regions, the outer a 

 hyaline, '^ porous," sharply bounded investment, without 

 any external process (which withstands the action of sul- 

 phu.ric acid), and gives passage to a number of fine linear 

 pseudopodia emanating from the contained inner sarcode 

 mass, which contains a globular, smoothly^ bounded " central 

 capsule" (or sometimes several, A. minutus, A. radians), with 

 variously coloured contents. 



Greef describes the outer coat or marginal region of the 

 form appertaining here as porous and siliceous, I myself have 

 1 Loc. cit., p. 496, et seqq. 



