112 Myxophycege, Chroococcacese, Tetrapedia. 



ribiis rectis, leviter divergentibus, apicibas medio retiisis; a vertice 

 visis ellipticis, polis acutis sed niedio utriuque leniter constrictis. 

 Hah. m Madagascaria insula (West). 



2. Tetrapedia Crux-Mlchaeli Reinscli Algenfl. von Franl<:en p. 38, t. I, 286 

 f. 6, Archer in Quart. Journ. of Micr. Sc. Vol. XII, p. 354, t. XXI, 



f. 9-10, Grevillea I, p. 45, t. III, f. 11-13. — Cellulis quadraticis, 

 marginibus lateralibus integerrimis, utrinque leniter emarginatis; 

 cellulis evolutioribus quadripartitis, incisurarum directione in mar- 

 ginum lateralium directione angulo semirectangulo versa, 8-12 jj.. 

 latis. 



Hah. in fossis Franconia; (Reinsch), Hibernice (Archer). 



3. Tetrapedla? Walllchlana Turn. Freshw. Alg« of East India p. 12. 287 

 — Cellulis quadraticis, angulis rotundatis, mucrone acuto parvo 

 munitis, 11^11 ij.. 



Hah. m aqua dulci Bengali;^e (Turner). 



4. Tetrapedla Penzlglana De Toni in Hedwigia 1891, p. 194, Algas 288 

 Abyssinica3 in Malpighia 1891, p. 269 et in N. Notarisia 1892, 



p. 104. — Coloniis solitariis, 4-cellularibus, fere exacte quadraticis, 

 12-15 {1. lat., cellulis subquadraticis, 4-5 [x. latis, latera 2 externa 

 concavo-emarginata, latera 2 interna (hoc est cuui aliis cellulis 

 contigua) recta pnebentibus, angulis superioribus liberis profunde 

 (usque ad medium) incisis; contentu subhomogeneo, dllute leru- 

 gineo. 



Hah. inter algas confervaceas in tUimine Anseba prope Arba- 

 sciko Abyssinias (0. Penzig). 



5. Tetrapedla aversa W. et G. S. West Welw. Freshw. Afr. Alg. 289 

 in Journ. of Bot. 1897, p. 301. — Minutissima, paullo latior quam 

 longior, profunde constricta in raedio sinu acutangulo et aperto, 

 lobis lateralibus late rotundatis, apicibus concavis; a vertice visis 

 elliptico-oblongis; long. cell. 9,5-10,5 [x. lat. 10,5-11,5 [j.. lat. con- 

 strict. 4-4,5 [x. crass. cell. 5,5 [x. 



Hah. ad Pungo Andongo Africse, in stagnis propo Anbilla, 

 Congo (Welwitsch). 



6. Tetrapedla gothlca Reinsch Algenfl. von Franlien p. 37, t. II, f. 2, 290 

 Archer in Quarterly Journ. vol. XII, p. 351, t. XXI, f. 1-8, Cooke 

 Brit. Freshw. Alg. p. 216, t. LXXXVIH, f. 8. — Cellularum 

 ambitu quadrangulari, marginibus lateralibus in medio non pro- 

 funde incisis, lobulis in medio paulo emarginatis; cellulis evolu- 

 tioribus quadripartitis, incisurarum dircctiono perpendiculari 6- 

 8 [A. latis. 



