V EG A- E X P ED IT 1 N E N S VET ENS K A PL I G A ARBETEN. 



463 



5. Gomphonemeae. 



Blioicosphenia curvata (Kiitz) Grun. (Gomphonema curvata 

 and G. marina W. Sm. Syn. 1, PL XXIX, fig. 245— 24G) GreenL, 

 Bessel's Bay, Spitsb., Finm., Cape Deschnew (East Cape). 



Gomphonenia Immtschaticum Grun. (Casp. S. Alg. pag. 12, 

 PL III, fig. 4. Van Heurck Syn. PL XXV, fig. 29) GreenL, Pes- 

 sel's Bay (a small form, length 0,o3 mm. br. 0,oo5 mm. Stride 15 

 in 0,01 mm. in the middle 18 in the end.) Mushroom Point. 

 Cape Wankarema (var. siherica Grun. in CI. M. Diat. 315 — 318, 

 more slender and linear; stria) less radiant.) 



G. pachycladiim Breb. (Van Heurck Syn. PL XXV, fig. 31 — 

 32) Cape Wankarema. Strife parallel, 16 in 0,oi mm. Length 

 0,02 7 mm. Br. 0,oo6 mm. 



a. arcHcum Grun. (Van Heurck Syn. PL XXV, fig. 30) F. 

 J. L., Novaya Zemlya (on the ice). Cape Wankarema. 



6. Naviculaceae. 



Navicula Bory. 



Sectio : Flnnularia. 



Navicula Pinnularia Q\. (Ofvers. af K. Sv. Vet. Ak. Forh. 

 1868, pag. 224, PL IV, fig. 1—2. N. qiiadratarea A. S. N. Sea 

 Diat. PL II, fig. 26) GreenL, Mushroom Point, Spitsb., Finm., 

 Kara, Cape Wankarema. 



In the Cape Wankarema material occur a number of va- 

 rieties. The valve varies from subconstricted to gibbous in 

 the middle with all possible transitions to N. Stuxhergii CI. 

 The stride are in some specimens from the same locality inter- 

 rupted and vary from 9 to 12 in 0,oi mm. var. interrupta CL 

 PL 36, fig. 21. 



Another variety, asymmetrica CL, has the striae on one half 

 of the valve more approximate to the median line, than on 

 the other. Length 0,o8. Br. 0,oi8, strise 8 in 0,oi mm. obscurely 

 punctate. 



■--■N. Stuxhergii CL . (A. Diat. pag. 13, PL I, fig. 15) F. J. L., 

 Kara, Cape Wankarema. 



var. siibcontinua Grun. F. J. L. (unknown to me). 



var. leptostaiiron Grun. F. J. L. (unknown to me). 



K. fluminensis Grun. (Verb. 1860 pag. 520, PL I, fig. 7) 

 Kara. 



