Mr. H. J. Carter on new species o/'ffidogonium. 31 



ditto of male filament, g^^rd ; diameter of resting-spore, 

 jjgth ; length of spermatozoid, y-g^^^th. 

 Hab. Freshwater tanks in the island of Bombay ; floating at- 

 tached to Ceratophyllum, Cladophora, &c. Sporing in August 

 and September. 



CB. diandronites'^, H. J. C, nov. sp. ? PL III. fig. 3. 



All the characters of the foregoing, but with the sexes on the 

 same filament, and the filaments smaller ; also without dehis- 

 cence of the spore-cell. Male cells annular, in pairs, situated 

 between every 1-2 ordinary cells, each bearing a single sper- 

 matozoid. Striae on the spore-cells few, or altogether want- 

 ing; micropyle on the prominent portion of the spore-cell, 

 marginate. Width of filament about g^^rd inch ; diameter 

 of resting-spore, ^^g^d; length of spermatozoid about xuV^*^* 



Hab, The same as that of the foregoing species. Sporing in 

 August and September. 



(E, triandronitesj H. J. C, nov. sp. ? PI. III. fig. 4. 



Filaments short, green, fixed; cells cylindrical, expanded at the 

 upper part towards the free end of the filament. Sexes on 

 the same filament. Male cells annular, in triplets, situated 

 between every 2-4 ordinary cells, sometimes immediately 

 under the spore-cells, each producing 2-3 spermatozoids. 

 Spore-cell sphero-conic, truncate, with or without striae 

 above; micropyle simple, on the prominent portion. Spore 

 spherical, presenting a peculiar beaded appearance at the cir- 

 cumference, apparently produced by corrugation of the outer 

 or coriaceous coat (fig. 12). Width of filament y^^o^^ ^^^^ ' 

 diameter of resting-spore, ^—^d; length of spermatozoid 

 unknown. 



Hab. The same as that of the foregoing species, but parasitic 

 on floating Cladophora. Sporing in August and September. 



Observations. — It will have thus been seen that these three 

 species of (Edogonium present unequivocal signs of distinction ; 



The protoplasmic sac is the * primordial utricle ' of Mohl, which is thus 

 evidently misappUed. The terms ' nucleus' and ' nucleolus,' too, if changed 

 to ' capsule ' and ' nucleus ' respectively, would be much better understood ; 

 for what is called the 'nucleus' is really the capsule of the 'nucleolus,' or 

 better, of the nucleus. I have used the term ' resting-spore ' here in con- 

 tradistinction to the spore formed by the contents of the ordinary cell of 

 (Edogonium, which, from rupture at the joints, frequently leave their cavity 

 en masse, and assuming an ovoid form, swim about for some time, and then 

 germinate. 



* 'Ai/Spo)!/, a man's apartment. 



