84 WELWITSCH'S AFRICAN FRESHES ATER ALG.E. 



10. E. subinerme, sp. u. (tab. 366, fig. 18). E. iDarvum, 

 circiter l|-plo longius quam latins, profuude constrictum, sinu 

 angusto-lmeari ; seraicellulii? truncato-pyramidat?e, angulis basali- 

 bus rotuudatis, lateribus excavationibus duabus projectione mediana 

 rotundata, angulis apicalibus rotuudatis, incisura mediana profunda 

 liueavi ad apicem rectum, tumoribus tribus trans basin semicellulae 

 uniuscujusque et tumoribus duobus alternantibus trans medium (ut 

 in K. sinnoso) ; a vertice viste anguste oblongo-ellipticfe, j)olis obtuse 

 conicis, projectionibus rotundatis tribus et projectionibus duabus 

 alternantibus supra utrobique instructfe, lobo polari oblongo- 

 elliptico; membraua minute et sparsissime scrobiculata. Long. 

 35 /x ; lat. 22 ji; lat. apic. 10-5 /x ; lat. isthm. 8 /x; crass. 12 ji. 



Pungo Andongo. In pascuis spongiosis breve graminosis juxta 

 rupes gig. pr. Catete ; May 1857. No. 111. 



This species is in outline very similar to E. inerme (Ealfs) Lund. 

 {Nom Acta B. Soc. Scient. Ups. ser. 3, viii. no. ii. (1871), 20, t. ii. 

 f. 3), but it is much smaller and shorter, has different basal angles, 

 and also a very different arrangement of surface tumors. From 

 E. sinuosuni Lenorm. it differs in its much smaller size and its 

 short rectangular polar lobe as seen in front view ; from the vertical 

 view the polar lobe is oblong-elliptical, and not sinuate-quadrate. 



11. E. ERosuM Lund. /. c 22, t. ii. f. 6 (1871). 



Forma minor. Long. 19-21 //. ; lat. 13-5-15-5 /x; lat. isthm. 

 3-5-4 /x; crass. 10 /x. 



Huilla. In uliginosis editioribus prope Humpata, Empalanca 

 et Lopollo ; May 1860. No. 15. 



12. E. cosMAEioiDES West & G. S. West in Trans. Linn. Soc. 

 2 Ser. V. 54, t. vi. f. 23 (1895). 



Var. cuETUM, var. n. Var. cellulis brevioribus. Long. 23 /x ; 

 lat. 18 /x; lat. isthm. 5*5 /x ; crass. 13-5 /x. 



Huilla. In uliginosis editioribus prope Humpata, Empalanca 

 et Lopollo ; May 1860. No. 15. 



13. E. BiNALE (Turp.) Ehrenb. in Bericht. Veih. Preuss. Akad. 

 Wissensch. Berlin, 208-9 (1840); Ralfs, Brit. Desm. 90, t. xiv. f. 8 

 (1848). Heterocarpella binalis Turp. (1820), Cosmariuin Aitcliisonii 

 as figured by W. B. Turner in K. Sv. Vet. Akad. Handl. Bd. xxv. 

 no. 5 (1893), t. viii; f. 54r<, i {a is obhque) ; non C. Aitcliisonii 

 Schaarschm. (1884). 



Var. ANGOLENSE var. n. (tab. 366, fig. 8). Var. minor, angulis 

 apicalibus productis et late rotuudatis, angulis basalibus rotundatis; 

 cellulis a vertice visis subglobosis, polis productis ; a latere visis 

 semiellipticis. Long. 19 /x; lat. 10 /x ; lat. isthm. 2-5 // ; crass. 8-5 /x. 



Huilla. lu uliginosis editioribus prope Humpata, Empalanca 

 et Lopollo ; May 1860. No. 15. 



14. E. DENTicuLATUM (Kirchn.j Gay in Bull. Soc. But. France, 

 xxxi. 335 (1884). E. binale v. denliciilatiDii Kirchn. in Cohn, Kn/pto(i. 

 Flora Schlesiai, 159 (1878). Long. 17-18//.; lat. 13-13-5 /x"; lat. 

 isthm. 3-5-4 /x, 



Pungo Andongo. In staguis prope Anbilla iCoudo); March 

 1857. No. 177. 



