KONGL. SV. VET. AKADEMIENS HANDLINGAR BAND. 22. N:0 8. 47 



nullis; a latere visas fere circulares; a vertice visa? anguste ellipticae vel oblongse lateribus 

 fere parallells (fere ut in Cosmavio Pardalis Cohn (Desm. Bong. tab. 11, fig. 8), cujus 

 semicellula? magis rectangulari-elliptiea 1 sunt). 



Long. 54 — 64 ,«; lat. 54 — 56 ,u; lat. isthm. 18 ,«; crass. 27 — 28 ,". 



Arthur Pass (17); Lake Lyndon (20); Omatangi (240). 



3. C. confusum Cooke Brit. Desm. p. 110, tab. 42, fig. 9; C. Brebissonii « genuinum 

 Jacobs. Desm. Danem. p. 194, tab. 7, fig. 15; Arcm. Microscop. Journ. 1877, n. s. n:o 



68, "p. 305. 



ft regularius nov. var. ad inter. Tab. 5, fig. 6. 



Semicellula" angulis inferioribus rectis non productis, granulis subirregulariter eon- 

 centrice ordinatis, in centro membrana pellucido-punctata (incrassata); e vertice visa? 

 elliptica?. 



Long. 44 — 53 ,u; lat. 35 — 41 ,«; lat. isthm. 13 — 15 ,«; crass. 26 ,w, 



Taupo (155, 162). 



As tö its specific status, I am in some doubt, but, at present, I think it best to 

 regard this plant as a variety of the above mentioned species. 



4. C. Botrytis (Bory) Menegh. sec. Kales Brit. Desm. p. 99. 



Ha? duae forma^ mihi in visu obvenerunt: 



1). Forma granulis rotundatis, tantum margine et marginem versus evolutis (in 



centro nullis), membrana punctata (Cfr. de Bary Conjug. tab. 6, fig. 1^ — 4). 



Long. 60—64 .«; lat, 46—50 ,«; lat, isthm. 14—16 /u. 



Kohukohu (104); Orakeikorako (299). 



Nonnulla individua (chlorophyllophora) eodem habitu e lacu Lyndon (1) crenis bigranulatis (ut in Co.wi. 

 siibspecioso) vidi, qiue forma aucuratius sit indagauda. 



2). Forma apicibus saepe subproductis (granulis triangularibus). Tab. 5, fig. 7. 



Long. 48 — 63 ,«; lat, 44 — 57 ,«; lat, isthm. 16 — 17 ,«; lat, apic. circ 22 — 26 ,«; 

 crass. 27 — 28 u. (C. Sportella var.?) 



Dunedin (26); Otago (50). 



On Cosvk Botrytis the central granulated inflation may either be wanting or devel- 

 oped. (Comp. Wittr. et Nordst. Alg. exs. n:o 826 c , where specimens very near to the 

 above mentioned form sparingly occur). Cosm. Quasillus Lund., C. fusum Roy et Biss. 

 (Jap. Desm. p. 194, tab. 268, fig. 20) and C. Kjellmani * gr ande Wille are ällied forms. 



5. C. subpunctulatum nov. spec. Tab. 5, fig. 8. 



C. fere tam latum quam longum, sinn mediano angusto interne paullulo ampliato; 

 semicellula» trapezoidca' subreniformes, dorso truncata?, basi subreniformes, lateribus modice 

 convexa 1 , angulis inferioribus obtusis, superioribus obtuso-rotnndatis, membrana (prascipue 

 marginem versus) subtiliter granulata granulis (in ^ margine laterali circ. 10, apicalibus 



