KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 8. 49 



6. C. Blyttii Willb Bidr. Norg. Alg. p. 25, tab. 1, fig. 7. Cfr. Nordst. Desra. Grönl. 



p. 8, tab. 7, fig. 4. 

 Forma granulis ssepe segre conspicuis, interdum tumöre subbasali fere inconspicue 

 tri-granulato. 



Long. 14 — 15 ,«; lat. 11,5 — 14 ,«; lat. isthm. 4 ,a; crass. 8,5 u. 

 Omatangi (240). 



7. C. quadrifarhim Lund. Desm. Suec. p. 32, tab. 3, fig. 12 (incl. C. hexastichum 



Lund. 1. c. p. 33, tab. 3, fig. 13). 



Forma hexasticha (C. hexastichum Lund.) et f. octasticha (C. hexastichum /i octa- 

 stichum Nordst. Sydl. Norg. Desm. p. 14). 



Semicellulse verrucis tumoris basalis orbicularis 1 — j— 6 vel l-f-6-{-ll vel 3 — J— 9, 

 marginalibus 17 — 19. 



Granula serierum 2 interiorum formas octasticha? singula, apice nou emargiuata; 

 quce 2 series fortasse revera unam seriem efficiunt, unde similitudo cum f. hexasticha 

 major fit. 



Forma minor: long. 32 ,«; lat. 22 ,«; crass. 16 ,«; long. zygospor. 36 ,u; lat. 28 «. 



Waimakariri river (5); Arthur Pass (17); Blueskin Ba}- (40); Papakauri (109); Taupo 

 (154, 156, 157); Omatangi (240, 244, 258); Tauranga (305). 



Forma major: long. 48 — 68 ,«; lat. 35 — 42 ,«; lat. isthm. 16— 20 ,w; crass. 25 — 32 u. 



Taupo (157); Omatangi (240; cum zygospora quadrata ut in Lund. 1. c). 



The granules on the basal inflation are connected with each other by rays of a more 

 incrassate membrane, whereb} 7 will arise the construction of a shape soraewhat similar to 

 that of Cosrn. tholiforme Cohn Desm. Bong. tab. 11, fig. 9. 



8. C. subspeciosum Nordst. Desm. aret. p. 22, tab. 6, fig. 13. 



/? validius nov. var. Tab. 5, fig. 10. 



C. speciosum [i inflatum Mask. N. Z. D. Add. p. 240, tab. 24, fig. 6?. 



Paullo major; semicellulse tumöre basali majore (subelliptico) granulis in series (circ. 

 9) verticales (sed nullas horizontales) dispositis ornato, crenis lateralibus 9 — 10. Nuclei 

 amylacei? 



Cosmarium binum Nordst. in Wittr. et Nordst. Alg. exsicc. n:ro 383 valde affine 

 est, sed prajcipue differt angulis inferioribus semicellularum magis rotundatis, apice 6- 

 crenato, omnibus granulis mai'ginalibus binis. 



Long. 68 — 84 ,m; lat, 47—53 ,«; lat, isthm. 22 ,«; crass. 33 ,«. 



Waimakariri river (5); Arthur Pass (17); Lake Lyndon (20); Auckland (70); Oma- 

 tangi (248). 



The difference between the New Zealand and the Spitsbergen form is, in my opi- 

 nion, not too great for them to be included into one species. Perhaps the amylaceous 

 vesicles are 2, which may signify a nearer relationship to C. binum. An allied species, 



K. Sv. Vet. Akad. nandl. Bd. 22. N:o 8. ' 



