Myxophyceas, Cliroococcacege, Tetrapedia. 113 



Ilah. m fossis primitus in Franconia inventa (Reinsci]), in Hi- 

 honiia (Auchetj) et Iiidia (Turner). 

 7. Tetrapedia Reinschiana Archer in Qnarterly Journ. of Micr. Science 291 

 p. 364, t. XXI, f. 11-13, Grevillea I, p. 46, t. III, f. 11-13, Cooke 

 Brit. Freshw. Alg. p. 216, t. LXXXVII, f. 9. — Cellulis quadran- 

 gularibus, lateribus duobus oppositis sinu amplo triangulari exca- 

 vatis; segmentis ita efifonnatis isthmo lato conjunctis, late cuneatis, 

 margine superiori subconvexis; cellulis e latere visis oblongis, 

 medio constrictulis, apicibus rotundatis; cell. diam. 7-10 [x. diam. 

 Hah. m aquis stagnantibus Hibernia^ (Archer, West) et An- 

 gli;e meridionalis (Roy, West). 



8. Tetrapedia foliacea Turn. Freshwater Algte of East India p. 12, 292 

 t. XX, f. 18. — Cellulis filiis trigonis, lateribus convexo-foliatis, 



11 =* 11 {X., 3 |J.. crassis, a latere visis acuto-lanceolatis, medio paulo 

 constrictis apicibus (luasi mucronatis. 



Hah. in aqua dulci Bengalia^ (Wallich). — Habitus F. Crux- 

 MichoAi. 



9. Tetrapedia setigera Archer in Quarterly Journal of the Microsco- 293 

 pical science vol. XII, p. 365, f. 14-16, Grevillea I, p. 46, t. III, 



f. 14-17, Cooke Brit. Fresh. Alg. p. 216, t. LXXXVII, f. 10. — 

 Cellulis trigonis, unoquoque margine laterali plus minus profunde 

 sinu amplo rotundato excavato, lobis his tribus apice rotundatis 

 et seta tenuissima recta terminatis, fere diametrum cellulse longi- 

 tudine aequantibus; cellulis e latere visis oblongis, medio utrinque 

 tumidulis, apicibus rotundatis setaque terminatis, sine setis 6-7 '/, [j.., 

 cum setis 16-20 [j.. latis. 



Hah. in aquis stagnantibus Hibernise (Aroher, West). 



10. Tetrapedla trlgona W. et G. S. West in Journ. of the Linn. 294 

 Soc. XXX (1894), p. 277, t. XVI, f. 8. - Cellulis triangularibus, 



7,2 « 3,6 [j.., lateribus concavis, angulis subrotundatis ; a latere 

 visis ellipticis; contentu pallide serugineo et homogeneo. 



Ilah. in flumine «Sliarp» ins. «S. Vincent» Indiie occidentalis 

 (Elliott). 



Species dubia. 



11. Tetrapedla? glaucescens (Wittr.) Boldt Studier p. 51 et 59, Ar- 

 /hrodesnius^ glaucescens Wittr. Om Gotlands och Oelands Sot- 

 vattensalger p. 55, t. 4, f. 11, adest quoque var. papillifera Gutw. 

 Sp. Kom. Fiz. t. XXV, p. 16, t. I, f. 15, Acta Ac. Liter. Cracovite 



8 



