— io34 — 
Cundinamarca : no 23 (frequent). 
The main feature of this form lies in lhe dilatation of the lower part of the semicells 
immediately above the basal angles; there is also a slight thickening of the cell-wall at 
the apex of the dilatation. 
186. Euastrum evolutum(NoRDST.) W. and G. S. West. — Antioquia : no 5 (frequent). 
187. Euastrum inerme Lund. — Antioquia: n° 5 . 
188. Euastrum insulare (Wittr.) Roy. — Cundinamarca: no 24. 
189. Euastrum personatum W. and G. S. West var. columbianum var. nov. 
Var. angulis lobulorum lateralium inferiorum spina minuta suberecta præditis ; in 
centro semicellularum scrobiculis nullis ; granulis intra margines latérales carentibus. 
Long. 4 2 PG lat. 29 p. ; lat. lob. polar. 18 p. ; lat. isthm. 6,5 p. (PI. XXII, fig. 38 ). 
Antioquia : In ditches between Medellin and America, Central Andes ; altit. i 55 o m. 
No 6. 
The type form of this species is known from Central Africa, Madagascar and Ceylon. 
190. Euastrum pictum Bôrgesen in Vidensk. Medd. naturh. Foren. Kjôbenhavn, 
1890, p. 939, t. 3 , f. 19. 
Long. 58-64 pG lat* 4 °* 4 i p- ; lat.. lob. polar. 3 1 -38 p. ; lat. isthm. 10-11 p. (PL XXII, 
fig* 35 - 36 ). 
Antioquia : n° 5 . 
The specimens agreed very well with Bôrgesen’s original description and figure. 
They were a little smaller and there was a trivial différence in the basal angles of lhe 
semicells, which were constantly (even if only slightly) bilobulate, each lobule being 
emarginate. 
1 9 1 . Euastrum pinnatum Raj.fs. — Antioquia: n os 3 , 4 (very abundant) and 5 . 
Cundinamarca : n° 24. 
192. Euastrum quadriceps Nordst. in Vidensk. Medd. naturh. Foren. Kjôbenhavn, 
1870, p. 216, t. 2, f. 5 . 
Long. 1 12-120 p. ; lat. 58-64 p. ; lat. lob. polar. 24,6-26 p. ; lat. isthm. 17-19,6 p. ; 
crass. 33-36 p. (PL XXII, fig. 4 o). 
Antioquia : no 5 (frequent). 
This species was first pescribed from Brazil, and the Columbian specimens were 
quite typical. The three basal protubérances of each semicell were especially well marked 
and the general rectangular character of the vertical view was as pronounced as in the 
Brazilian form. 
The specimen figured by Borge (in Arkiv for Botanik ntgifr. K. Sv. Vet.-Akad. Bd. I, 
1903, t. 4 , f- 2I ) from Paraguay is by no means typical in vertical view, being elliptic 
rallier than rectangular. 
ip 3 . Euastrum sublobatum Bréb. forma minor. 
Long. 16 p.; lat. 1 1 ,5 p. ; lat. apic. 1 r [/. ; lat. isthm. 2,5 p. ; crass. 9,6 p.. — Antioquia: 
n» 5 . 
