COSMARIOI. 219 



(granules acute), apex broadly truncate (very slightly 

 convex) and smooth, with a number of minute scattered 

 granules within both lateral and apical margins, and 

 with 3 or 4 larger flattened granules in the centre. 

 Side view subcircular. Vertical view elliptic, minutely 

 granulate except for a smooth central area, and with 

 three large flattened granules at the middle on each 

 side. Chloroplasts axile with a large central pyrenoid. 



Zygospore unknown. 



Length 37-38'5,u; breadth 33-36 A < ; breadth of 

 isthmus 11 ILL ; thickness 21 //. 



ENGLAND.- -Near Goring 3 S.E. Oxfordshire! 



This Desmicl was frequent among other Alga? in a small 

 pond near Groring in Oxfordshire. It should be carefully 

 compared with C. punctulntum var. subpunctulatum and with 

 C. l>oec~kii } from both of which it can be distinguished without 

 difficulty. 



196. Cosmarium Kjellmani AVille. 

 (PL LXXXY, fig. 13.) 



Cosmarium Kjellmani Wille, Ferskv. Alg. Nov. Semlj. 1S79, p. 42, t. 12, 

 f. 31 ; ? Wolle, Desm. U. S. 1884, p. 87, t, 49, f. 19-21 ; Cooke, Brit. 

 Desm. 1887, p. 113, t, 42, f. 11; De Torn, Syll. Alg. 1889, p. 1026; 

 West, Alg-. W. Ireland, 1892, p. 158 ; Eoy & Biss. Scott, Desm. 1894, 

 p. 104; Nordst. Index Desm. 1896, p. 152 ; West & G. S. West, Alga-fl. 

 Yorks. 1900, p. 76. 



Vrsinella Kjellmani Kuntze, Revis. gen. plant. 1891, p. 925. 



Cells small, as long as broad, deeply constricted, 

 sinus narrowly linear with a slightly dilated extremity; 

 semicells widely truncate-pyramidate or trapeziform- 

 subsemicircular, basal angles obtuse, sides convex and 



o 



strongly converging upwards from a broad base to a 

 somewhat narrow apex, apical angles not rounded, 

 apex truncate and straight ; cell-wall minutely granu- 

 late, about 6 granules showing on each lateral margin 

 and 5 or 6 at the apical margin, granules within the 

 margin radially arranged, with a tumour in the centre 

 furnished with 5 vertical series of granules. Side 

 view of semicell ovate, with a Granulated tumour near 



^ t> 



