<S3 



Docidium Hutchiììsonii n. s. p. 346, f. 16. Straight; semi-cells 

 faintly sinuate, ends truncate with broadly rounded angles, basai 

 portion gently dilated, suture not prosilient. Surface covered with 

 small papillae, 2,5-3 [j-, long., those at ends 1,7-2 y.. long. Frond 

 long. 245-280; lat. bas. 21-26, apio. 17-19,5 a. 



Closleriwn ìntcrmediuìn v. scuìplam Rac. f. eboracense n. f. p. 34Ó, 

 1". 17. A very fine form, with dilated apices 



Cylindrocystìs roseola n. s. p. 346, f. 18. Membr. yellowish-pink 

 or bright pink in colour; the sides are gently incurved; membr, 

 thickened at apices. Dim. 46-52 « 19-21 y.. 



Spondylosium monile n. s. p. 346, f. 19. A tiny form, in front 

 view biglobate, in side view gently contracted in the middle. Measure 

 (about) long. 7, lat. 4, or. 3 a. 



S. armillatum n. s. p. 346, f. 20. Biscoctiform, centre gently in- 

 cavate in front view; side view compressed. Measure (about) long. 6, 

 lat. 3,7, cr. 2,5 y. 



Euastrum exìle n. s. p. 346, f. 21. Minute, with incurved sides, 

 expanded and rounded basai angles, and rounded apices, incisions 

 curvato-cuneate. Sinus narrow. Side view lanceolate, apices rounded. 

 Dim i5 '^ 8 » 3 a.; cr. 4 u. 



Die Art muss einen anderen Namen erhalten, da schon Joshua 

 (Burmese Desmid. p. 640) ein E. exile beschrieben hat. 



Closterium abruptum West v. canibrìcum n. v. p. 346. Differs from 

 the type in being regularly curved , and in being proportionally 

 shorter and thicker, Dim. 1 14-130 « 14-17 </• 



C. scoticum n. s. p 347. Frond long and narrow, for about '/^ 

 ths of the length of nearly the same diameter, tapering a little at 

 the ends, which are expanded into rounded or rotundo-truncate 

 «knobs». Suture i, rarely 2, not centrai, and often complex, of4-7 

 transverse striaE. Membr. smooth, variable, either colourless, or from 

 pale yellow to redbrown in tint. The frond is straight or but slightly 

 curved; very variable in size. Endochrome axillary, with a centrai 

 line of corpuscles. Dim. 260-489^ io-i3 a. lat ap. 8,5-i2,5 u. 



Die Art ist spàter von Roy and Bisset in « On scottish Desmidiese » 

 abgebildet, T. IV, f. 8. 



— ;3 fusiforme n. v. p. 347. Almost straight, frond not so even 

 in diameter, decidedly fusiform. Dim. 295-415* 12, 5-i5 a. lat. ap. 



9-11,5 [X. 



Die Varietàt ist spàter von Roy et Bisset 1. e. T. IV, f. 9 abge- 

 bildet. 



