— luMi — 



Ciiiiilin;Hii;u'ca ; ii" j.'^ i iVe(|ii('nt^. 



'l'Iie main tValiiii' ni' lliis Inriii lies iii llu' tlilalalion of llie lowerparl ol' llic sciuicclls 

 iininetliatelv alunc tlu' lia-^al ailles; llicir is aiso a slii^iil lliickeiiiiii;- ><[' llu- cellwall al 

 llie apex lit' llic dilatation. 



i86. Euastrum evolutum (^Nordst. ) \N . aniltj.S. ^^EST. — Aiilidqiiia : n.. f) (^tre(]utMit). 



187. Euastrum inerme Lund. — Aiitio(|uia : ii" 5. 



188. Euastrum insulare (WriTu."! lluv. — ( Inndinaniarca : ii" -i^]. 



189. Euastrum personatum W. and (i. S. \\ est \ai-. columbiaiium var. nov. 

 Yar. aiigulis lobuloruiu laleraiinin iiitl-riorum spina iniiiula suhufeda pi'a'dilis; iu 



ceiilro semiccllularurn scrohii'ulis nullis ; gi'anulis inlra niargiiics lalL'rales careiiliiius. 



Long-, /fi a; lai. 29 y.; lat. inli. polar. iS y.; lat. istlini. (),.'> a (PI. XXII, lii^'. .'^8). 



Anfior/uia : In dilclie.s bftwecn Medellin ami Anieiica, (Central Amies ; altil. i55o ni. 

 No 6. 



The type foriii of tliis species is knovvii from Central Africa, Madagascar and Ceylon. 



190. Euastrum pictum Bôrgesen in Vidensk. Medd. naturh. Foreu. Kjôbenliavn, 

 1890, p. 939, t. 3, F. 19. 



Long-. 58-64 y.; lat. 4i'-4i JJ- ; lat. lob. polar. 3i-38[;. ; lat. istlini. lo-ii u. (PI. XXII, 

 fig. 35-36). 



Antioquia : n» 5. 



Tlie spécimens agreed very well witli Bôrgesen's oiiginal descri|>tion and figure. 

 Tliey were a liltle snialler and llierc was a trivial dill'erence in ihe basai angles of the 

 semicells, which were conslantly (even if only slighfly) bilobulate, eacli lobule being 

 emarginale. 



191. Euastrum pinnatum [\alfs. — Antioquia: n"' 3, 4 ('^'t^''y abumlant) and 5. 

 Cundinamarca : n» 24- 



192. Euastrum quadriceps Nordst. in Vidensk. Medd. nalurli. Foren. Kjôbenliavn, 

 1870, p. 2 r6, t. 2, f. 5. 



Long. 112-120 [1.; lat. 58-64 y.; lat. lob. polar. 24,5-26 [j. ; lat. istliin. 17-19,5 [j.; 

 crass. 33-36 p. (PI. XXII, fig. 4o). 



Aiitioipiia : n» 5 (fréquent). 



ïliis species was first pesci'ibed from Brazil, and tlie Columhian spécimens were 

 quite lypical. The lliree basai protubérances of each semicell were ospecialiy well inarked 

 and the gênerai rectangular character of tlie vertical view was as pronounced as in llic 

 Brazilian form. 



Tiie spécimen figured by Borge (in Arkiv foi' Botanik utgifr. K. Sv. Vet.-Akad. Bd. I, 

 1903, t. 4, f- 21) from Paraguay is by no ineans lypical in vertical view, being elliplic 

 rallier llian rectangular. 



193. Euastrum sublobatum Iîrke. forma minor. 



Long. 16 ij.; lat. 11, ôa; lai. apic. i 1 ij. ; lai. istlirn. 2,0 [J.; crass. 9,5 [j.. — .\ntioquia: 

 no 5. 



