FRESH-WATER ALG.E OF HAMPSHIRE. 



337 



H. 

 L in- 



M. rotata Grev. E. 



M. papiUifera Breb. E. 



Euastnon verrucosum Ehr. E. 



E. oblongum Grev. E. 



E. ansatum Ehr. E. 



E. pectination Breb. E. 



E. binale Turp. B. 



E. insulare Wittr. P. 



E. elegans Breb. B. 



E. denticulatum Gay. E. 



Cosmarium anceps Lund. E. 



C. lave Rabenb. Tile-burn Pond. 



C. Cucumis Corda. B. 



C. pachydermum Lund. M. 



C. galeritum Nord. E. 



C. connatum Ralfs. E. 



C. Turneri, n. sp. E. B. Ralfs includes three species under 

 his margaritiferum. The first is his margaritiferum proper (Tab. xvi. 

 fig. 2b, c, and d). It has a zygospore with elevations all over it, 

 or, as Mr. Archer expressively puts it, "covered with bull's-eyes." 

 The second is his reniforme (I. c, fig. 2a). This has a perfectly 

 smooth zygospore. To the third Ralfs gives no varietal name, but 

 he figures it with its zygospore, which is covered with spines, on 

 Tab. xxxiii. fig. 6 b (not 6 a). Length, 461-48 /»; breadth, 38-39/a; 

 do. isthmus, 12-13 /x ; thickness, 25| /* ; diameter of zygospore, 

 44-45 n ; length of spines of do., 8 /x. It gives me much pleasure 

 to connect the name of Mr. W. Barwell Turner, Leeds, with this 

 very distinct species. He is a distinguished microscopist, and has 

 done excellent Desmid work. 



C. pygmmim Archer. E. 



C. anaustatum Wittr. E. 



C. Mmeghinii Breb. E. M. W. H. 



C. abruption Lund. E. 



G. abbreviation Racib. E. 



C. concinnum Rabenh. E. 



C. angulosum Breb. E. 



C. impressulum Elfv. E. 



C. striatum Boldt. E. M. 



C. holmiense Lund. E. — j 



tegrum Nord. E. 

 C. tetraophthalmum Kg. E. — (3. 



Lundellii Wittr. E. 

 C. margaritiferum Turp. E. 

 C. reniforme (Ag.?) Ralfs. E. P. 



0. Wittrockii Lund. E. 



C. siibpunctulatum Nord. & Berg. 

 E. H. 



C. Blyttii Wille. E. 



C. calcareum Wittr. E. 



C. Botrytis Menegh. E. P. B. 

 W. H. — 0. emarginatum Hansg. 

 E. B. 



C. gemmiferum Breb. E. 



C. ochthodes Nord. E. B. 



C. subcrenatum Hantzsch. R. H. 



( '. ( 'orbula Breb. E. 



( '. ornatum Ralfs. E. 



0. gradation Roy. B. 



Arthrodesmus octocornis Ehr. E. 



A. Incus Hassall. — f. divergent 

 Archer. E. — f. convergens Ar- 

 cher. E. 



A. eonvergens Ehr. E. 



Staurastrion dejectumJjveb. E. — 

 /j. patens Nord. E. 

 Journajl of Botany. — Vol. 28. 



S. apiculatum Breb. W. 



S. mucronatum Ralfs. E. 



S. glabrum Ehr. E. Like de- 

 jection, but spines straight and 

 inflexed. Length = breadth 

 = 19-2//.; breadth with spines, 

 22-4 /j. ; length of spine, 6 //. ; 

 length of side in end view, 

 with spines, 22-4 p. ; do. with- 

 out, 19*2 jx ; diameter of glo- 

 bular zygospore, 25*6 fx, with- 

 out spines ; length of spine, 

 14-4 jx. Spines numerous, 

 simple, subulate, b; 



8. Dickiei Ralfs. E. 



broad. 



W. 



E. 

 E. 

 M. 



S. euspidatum Breb. 

 8. O'Mearii Archer. 

 S. brevispinum Breb. 

 8. oligacanthum Breb. E. 

 S. Avicula Breb. E. 

 S.furcigerwn Breb. E. 

 [November, 1890.] z 



w. 



