994 Conjugatse, Desmidiace?e, Cosmarium. 



retusis, inerabrana granulata, granulis m agnis obtusis intus exca- 

 vatis fere in quincuncem ordinatis, series et verticales circ. 20- 

 24 rectas (granulis 10-12) et oblique transversas efficientibus, 

 quoque pellucido punctata punctis singulis inter terna granula; a 

 latere visis fere circularibus, a vertice lateribus parallelis (rarius 

 (monstrose?) retusis) apicibus rotundatis, pyrenoidibus binis. 



Hab. ad lacum « Pearson » et a Lyndon », ad u Teremakau et 

 Arahura, Auckland » in Nova Zelandia (S. Berggren). — Dimens. 

 cell. 80-108^64-98; crassit. 36-46 a., latit. isthmi 24-31 f/. 

 Affinia sunt Cosm. latum Breb. et var. margaritatum Lund., 

 C. orihopleurum Roy et Bisset, C. quadrum Lund., C. Pseudo- 

 broomei WoIIe, C. conspersum Ralfs, C. Pardalis Cohn. In C. 

 consperso Ralfs, et roiundato Wittr. atque C. Pseudobroomei 

 Wolle granula in series subregulares decussatas non quincuncia- 

 liter disposita sunt, in ceteris p!us minus in quincuncem, in 

 C. laio in series transversas paullo arcuatas, in C. lato var. mar- 

 gariiaio, in C. orihopleuro, in C. quadi^o ut in C. sublaio di- 

 sposita. Granula intus excavata sunt in C. sublato et C. lato, (in 

 C. orihopleuro, Pseudobroomei et Pardali ?). In C. quadro 

 verrucae sunt solidae. Semicellulie e vertice visae in C. consperso 

 ellipticse sunt, in C. lato (?) et ejusdem varietate (sec. Lund.) ob- 

 longo-ellipticse, in C. quadro oblongse, in C. Pseudobroomei et 

 C. pardali oblongae lateribus parallelis, (in C. orthopleuro igno- 

 tse). 0. Pardalis minor est seriebus granulorum paucioribus. Ita 

 Nordst. 1. c. 



138. Cosmarium Gayanum De-Toni, Cosmarium? elUpticum Gay 2375 

 Essai p. 63, t. II, f. 5 nec Delponte. — Cellulis magnis, ellipticis, 

 diaraetro subduplo longioribus, 70-90 « 48-64, profunde constrictis, 

 sinu lineari, isthmo 16-19 \j.. lato, 30-36 a. crassis; semicellulis 

 arabitu regulariter undulatis, obscure triangularibus, lateribus con- 

 vexis apice rotundatis, angulis basalibus rectis, e vertice et latere 

 visis ellipticis; pyrenoidibus in utraque [semicellula binis; mem- 

 brana uniformiter verrucis in series regulares dispositis ornata; 

 zygotis aculeis nuraerosis, subulatis, basi latioribus, apice atte- 

 nuatis, 3-4-dentatis, sine aculeis 60 a. diam. 



Hab. in rivulis ad « Sumene, Ganges, Montpellier » Galliae (F. 

 Gay). 



139. Cosmarium Arnellil Boldt Sibir. Chloroph. p. 107, t. 5, f. 15. — 2376 

 Mediocre, quarta vel quinta parte longius quam latius, profunde 

 constrictura, sinu lineari angusto; semicellulis subhexagonis basi 



