SPII^KOZYGA. 283 



Reproductive cells of various sizes, oval, and occurrimj 



in scries. 

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

 Ilab. Neiglibourhood of Dublin : Dr. Allman. County 



Wicklow : Mr. 3Ioore. Sussex : Mr. Jcnncr. 



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 ? BorTj. 

 Plate LXXV. Fig. 3. 



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

 Reproductive cells large and quadriform. 

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

 Ilah. 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 verrj slender, not moniliforin. Reproductive 

 cells 7nuch elongated, mostly solitary, small. 

 Hah. On mosses, Cheshunt : A. II. II. 



This species bears some resemblance to the jn-cccding ; the 

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

 and are slightly constricted in the centre. 



35. SPHJEROZYGA ^y. 



Char. Stratum gelatinous, in irhich undulate articulated 

 imbrayichcd threads icith quadrangular joints, joined 



