— 1024 



coiis|iicu<)iis t'ealure of P/rilocncciis fi/sci/liis is llie ciiloiir oF iIil- oell-w ;ills. Tlicy are of 

 a clull (lirtv lirown, aiul wlieii several calls are seen in inass, as at tlic ccltic oFaii (F.ddgo- 

 niiiin- filament lliey appear verv dark hrown or almost black. 



In sizc P. /iiKcaliis is siinilar to P. ririilis [^ Pleiirococciis vulfjaris aiict. ; Plcaro- 

 cnccciis I\'iïf/e/ii CnoDw), \m{ ihe spccies is at once disliimuished iiy its lialiil and hy llie 

 ilull lui i\\ n ci'll-w ails. 



Wilio lias icL-cnllv sliown (^cfr. Xyl Mai>azin l'or Naliii'x idensk. C.lii-isliania, ujii), 

 Bd. "ni tlial Protoroci-iis riridis \c,. niiisl lie rci;ai(lL'd as tlie correct nanie of liie conunon 

 Aiga so loii!»' placcd as » Pleurococciis viilgaris ». 



100. Trochiscia reticularis (IIeinscii.) Hansg. — Antio(|iiiii : n" [\. 



Family Autosporacex. 



101. Oocystis elliptica W. and G. S. Wicsr. — Cnndinainarca : n"' i4 and 23. 



102. Oocystis parva W. and G. S. West. — Cundiaamarca : n° 23. 



io3. Oocystis natans (Lemm.) Wille. — Cundinamarca : n» 21 (planklon). Long, 

 cell. 18 (V.; lat. 12 j^.. 



io/|. Nephrocytium lunatum W. West. — Candinamarca : n° 23. 



1(1.". Eremosphaera viridis De Baky. — Cundinamarca: 11" ■2!\. Diani. cell. i/|2-i.5('i p.. 



io(J. Tetraëdron énorme (Ralfs) Hansg. — Anliof|nia: n"* 1 and 2. Diam. cell. 

 sine spin. i2-i(i y., cum spin. 21-27 [j.. 



107. Tetraëdron bifurcum i\ViLLE) Lagerii. — Anliot|uia : n" 4- Diam. cell. cum 

 spin. 2g-34 [>■■ 



This species lias a wide distribution in botli (lie castcrn and western Iropics. 



108. Ankistrodesmus falcatus (Cokda) Ralfs. — Anlioquia : n" 4- 

 Vai-. acicularis (A. Bii.) G. S. West. — Cundinamarca : n>' 14. 



109. Ankistrodesmus sp. CelluUe lanceolatœ, 2 vel 4 '" tegumenio mncoso aggre- 

 gat;e, polis acutis ; chromatophora cum pyrenoide singulo. Long. cell. 20-21 [j. ; lat. 

 3,5-4,3 (^.. 



Cundinamarca : n" 23. 



Onlv iwo colonies oF this Alga were observed. Il is probably a new species, but il 

 is essential tliat more spécimens siiould be cxamiued. 



110. Ankistrodesmus Mayori sp. nov. 



A. minulissimis, inter alias algas libère natantibus; cellulis solitariis, angusiis, polos 

 aculissimos versus gradatim altenuatis, valdissime spiraliler contortis, anfractibus pioxis- 

 simis duobus ; cliromatopliora pallide viride, pyrenoidibns nullis. 



Lat. cell. 0,9-1,3 ,L/. ; diam. anfract. .5, .5-7, 5 f/. ; anfract. inler se dislantibus 2-2,8 [j. 



(PI. XXI, lig. 22-23). 



Cundinamarca: Laguna de L'bacpie, Eastern Andes ; altll. 206G m. n" 23. 



