WELWITSCH's AFRICAN FRESHWATER .\1.G.5. 83 



Var. REDUCTUM, vai'. n. Var. multe minor, sinibus miuime pro- 

 fundis, lobis polaribus rotuudioiibus et non dilatatis ad apicem ; 

 tumoribus a vertice visis multe reductis ; membraua punctata. 

 Long. 46-50 //. ; lat. 24-20 />- ; lat. isthm. 8-y-9-5 /x ; crass. 15 //. 



Huilla. In uliginosis editioribus prope Humpata, Empalanca 

 et Lopollo; May 18G0. No. 15. Morro de Lopollo ; May 1860. 

 No. 182. 



6. E. HYPOCHONDRuir Nordst. in Acta Univers. Lund. xvi. no. iv. 

 8, t. 1. f. 11 (1880). A form with slightly different lateral lobes; 

 this difference, however, may be owing to the specimens having 

 been dried for a long period. Long. 46 /j. ; lat. 42 /v. ; lat. apic. 15 /x; 

 lat. isthm. 11-5 /x ; crass. 20 /x. 



Libongo. Ad margiues flum. Lifune ; Sept. 1858. No. 204. 



7. E. HYPocHONDRomEs Wcst & G. S. West in Tram. Linn. Soc. 

 2 Ser. V. 49, t. vi. f. 8 (1895). Long. 49 /x; lat. 38 /x; lab. apic. 

 13'5 /x; lat. isthm. 9 /x ; crass. 17 /x. 



Pungo Andongo. In stagnis prope Anbilla (Condo) ; March 

 1857. No. 177. 



8. E. subpersonatum, sp. n. (tab. 366, fig. 19). E. sub- 

 mediocre, H-plo longius quam latins, profande constrictum, sinu 

 lineari extremo ampliato ; semicelluho subtrilobie, coustrictione 

 levi ad basin lobi polaris ; lobis lateralibus subrectangularibus, 

 angulis basalibns dente minuto instructis, lateribus snbretusis sub- 

 divergentibusque, angulis superioribus truncatis ; lobo polari trans- 

 verse rectaugulari cum lateribus convexis, spina parva divergenli 

 ad angulum superiorem unumquemque, incisura mediana profunda 

 aperta ad apicem convexum ; cum verruca magna rotundata in 

 centro semicellularum : membrana delicate punctata. Long. 39 /x ; 

 lat. 27 /x; lat. apic. 19-21 /x; lat. isthm. 7*5 /x. 



Pungo Andongo. In stagnis prope Anbilla (Condo) ; March 

 1857. No. 177. 



This differs from E. personatum West & G. S. West (I.e. 52-3, 

 t. vi. f. 19) in having one median wart nearer the middle of the 

 semicells and no accompanying scrobiculatious, in the lateral lobes 

 being widest in their upper portion, and in the wide gaping apical 

 notch. 



9. E. ELEGANS (Breb.) Kiltz. Pliyc Germ. 135 (1845) ; Ralf^j, 

 /. e. 89, t. xiv. f. 7. HeterocarpeUa eleqons Breb. (1839). Long. 

 26-29 /x; lat. 16-19 /x ; lat. isthm. 4-5-5 /^ ; crass. 11-5 /t. 



Iluilla. In uhginosis editioribus prope llumpata, Empalanca 

 et Lopollo ; May 1H60. No. 15. 



Pungo Andongo. In stagnis prope Anbilla (Condo) ; March 

 1857. No. 177. 



K. liiritrriituiii W. B. Turn, (in A'. iS'c. IV/.- J/.w-/. Ilnuill. Bd. 25, 

 No. 5, 83, t. xi. f. 1) and K. annuhaum W. 15. Turn. (/.<•. 80, t. x. 

 f. 36, 52) seem to us to belong to E. eleyans. Turner's drawing of 

 the "lateral view" of E. annulatiun (t. x. f. 52) shows that it is 

 somewhat oblique, and not strictly a lateral view. The zygospore 

 of E. incurviituni is also that of some forms of A', elfijans. 



G 2 



