SPH^EltOZYGA. 283 



Reproductive cells of various sizes, oval, and occurring 

 in series. 



Bory, in Diet. Class, d. Hist. Nat. vol. i. p. 309. 



Hab. Neighbourhood of Dublin : Dr. Allman. County 

 Wicklow : Mr. Moore. Sussex : Mr. Jenner. 



There is no species hitherto recorded with which this can 

 possibly be confounded. The form of the reproductive cells, 

 the various size of these and their occurrence in chains or 

 series serving to mark it from all others. 



3. ANABAINA IMPALPEBRALIS ? Bory. 

 Plate LXXY. Fig. 3. 



Char. Filaments minute, not moniliform, but little curved. 

 Reproductive cells large and quadriform. 



Bory, in Diet. Class, d. Hist. Nat. vol. i. p. 309. 

 Hab. Under a waterfall, co. Wicklow : Mr. Moore. 



This is also a very distinct species ; the reproductive cells 

 are large, elongated, and in the form of a parallelogram, with 

 the angles slightly rounded; they are also usually solitary, 

 rarely in pairs. It dries without gloss. 



4. ANABAINA CONSTRICTA Hass. 

 Plate LXXV. Fig. 9. 



Char. Filaments very slender, not moniliform. Reproductive 

 cells much elongated, mostly solitary, small. 



Hab. On mosses, Cheshunt : A. H. H. 



This species bears some resemblance to the preceding ; the 

 reproductive cells are, however, not nearly so large as in it, 

 and are slightly constricted in the centre. 



35. SPH^EROZYGA Ag. 



Char. Stratum gelatinous, in which undulate articulated 

 unbranched threads with quadrangular joints, joined 



