22 COCCOPHYCE.E. 



Hoxmospora txansversalis. Breb. 



Tubes slimy, equal or undulate ; cells ovate-oblong or fusi- 

 form, disposed transversely in a nioniliform series ; contents 

 granular. 



SIZE. Diameter of tube -075- -12 mm. 



Rabh. Alg. iii. 49. 



In bogs. 



Plate X. Jig. 3. a, portion of filament X 200 diam. ; b, portion X 

 400 diam. 



** Tubes branched. 



Hormospora ramosa. Thwaites. 



Tubes broad, gelatinous, irregularly branched ; cells oval or 

 nearly cylindrical, obtuse at the ends, either remote from each 

 other or connected, twice as long as broad ; contents green, 

 with green lamina? radiating from the centre. 



Thwaites in Harvey Phy. Britt. t. 213. Rabh. Alg. iii. 49. 



In brackish and salt water, attached to Cladophora. 



The filaments in this species, unlike those of the preceding two 

 species, are branched. 



Plate X. Jig. 2. a, portion of filament X 200 ; b, small portion with 

 cells X 400. 



GENUS 16. CYLINDROCAPSA. Reinsch. (1867.) 



Cells spherical or ellipsoid, membrane thick, either with a 

 three or fourfold tegument, or naked; cells associated in a 

 linear series in families, enclosed in a cylindrical hyaline gela- 

 tinous tube ; cells dividing transversely. Propagation by 

 gonidia uncertain. Cell contents green, granular, with a single 

 chlorophyllose corpuscle. Reinsch Algenflora, p. 66. 



Cylindrocapsa involuta. Reinsch Alyenflora> tab. VI. /. 1. 



Cells ellipsoid, ultimately involved in a fourfold tegument, 

 which is expanded at the poles. 

 SIZE. Cells -023--03 mm. diam. 



This plant has occurred in Ireland, as recorded by Mr. W. Archer, in 

 " Grevillea" (Vol. in. p. 40), with the following observations : 



" Admitting the identity, of which I myself do not doubt, though not 

 previously having seen examples, that author's description of this 

 minute alga does not appear quite complete, as he omits to mention that 

 the cylindrical hyaline envelope of the cells, combining them into a 

 frond, is closed at both extremities, rounded off at the upper, and some- 

 what produced, tapered and thin, slightly dilated into a scutate organ of 

 attachment (to foreign objects) at the lower extremity. Thus the ex- 

 tremities appear to be differentiated into a basal and apical. The Irish 



