BY G. T. PLAYFAIR. 541 



Figs 6, 7.— Ph. immarium, n.sp.; (0) x 1330, (7) x 2000. 



Figs. 8, 9. — Auabcena auMralica, n.sp.,( x 1000); (8) cells and heterocyst of 

 infertile trichome; (9) pai't of a fertile triclioiiie; the r^onstrictions 

 of tlie cells can be discerned only with the /.j in. obj. 



Fig. 10. — A. aufifraJica var. conffricta, n.var. ; ( x 1330). 



Figs. 1 J -13. — A. rariahih's xar. cyiindrncea, n.var. (x 1000); ill) cells and 

 heterocj'^st; (12) immature catenate gonidia; (13) matuie spore. 



Fig. 14. — A. oarlUarioides var. cyas-m, n.var.; ( x 6f)0). 



Figs. 15. 16. — A. /a.t-a var. hoiieih^i>i, n.var., ( x 1000); (!,')) cells and hetero- 

 cyst: (16) cells and spore. 



Figs. 17-21. — Cyllndrospennnm sta>/iui/e var. nn-^fra/e, n.var.; (17, IS) with 

 conical heterocysts( x 1000); (19. 20) with ol)long ]ieterocysts( x 660); 

 (21) coiled trichome. 



Figs. 22, 23. — ('. rerfani/ii/rtrf Plaj'f. ; (22) tricliome with thin-walled iiinna- 

 ture spore ( x 10(M>); (23) with mature thick- walled spore ( x 660). 



Figs.24, 2o. — C. i-ectaiKjnlare var. parvicellHla,n.xM\ ( x 1000); (25) trichome 

 with apical cell. 



Figs.26, 27.— C. GoeJzei Schm., forma: ( x KM)). 



Plate Iv. 



Figs. 1, 2. — Carteria ruynlosa, n.sp.; (2) endview; ( x 1000). 



Fig. 3. — C. ruf/ulosa var. angidata, n.var.; ( x 1000). 



Fig 4. — ('. ragidosa var. inrt^qualis, n.var.; ( x 1(X)0). 



Figs.5, 6.-6'. mulfifdis (Fresen.) Dill, formed; ( x 1330). 



Figs. 7, 8. — C. granulosa, n.sp.; (8) sideview; ( x 660). 



Figs. 9, 10. — Chlamydomonas reniformis, n.sp.; (10) sideview; ( x 1000). 



Fig. 11. — Chi. Lismorensis var. gracilis, n.var.; ( x2000). 



Fig. 12. -Chi. rotida, n.sp.; ( x 1000). 



Fig.l3.— C7</. alpina Wille; ( x 2000). 



Y\g.U.—ChI. caudata Wille; ( x 1000). 



Figs. 15-17.-67;/. timcidata, n..sp.; (15) x 1330; (16) with stratified cell-wall 

 ( xt)60); (17) mother-cell ( x 660), autospores ( x 1000); for conveni- 

 ence, the ccpnobium is drawn smaller, and the autospores therefore 

 appear more crowded than natural; the latter are in optical section, 

 the spotted surface of the chloroplast being omitted; the tiagella 

 were just as figured. 



Fig. 18. — Chi. macidata var. ohlonga, n.var.; ( x 1330), 



Fig. 19. — Chi. macniata var. planktoaicu, n.var.; ( x 1000). 



Fig.20.— CA/. mefastigma Stein; ( x 1000). 



Figs,21, 22.-67?/. paupercnla, n.sp.: (21) x 2(100: (22) x 1800. 



Fig. 23.— 6'/i/. pvsHIa, n.sp.; ( x 660). 



Fig.24. — Chi. angidosa var. ohesa, n.var.; ( x 13.30). 



Fig.25. — Chi. pisiformis \nr. orellafa, n.var.; mother-cell and autcxspores; 

 (x 1000). 



