22 



P. T. CLEVE, ON DIATOMS FROM THE ARCTIC SEA. 



No vara. pag. 99, Pl. I A, fig. 12). Spetshergen Braudwyns 

 Bay, rare. 



106. Amphora acuta Greg. (Diat. of Clyde pag. 524, PL 

 XIV, fig. 93—39 b). Spetshergen Amsterdam Id. Greenland, Da- 

 vis Strait. Finmarken. 



107. Synedra tabulata (Kg?) Sm (Syn. I, pag. 72, Pl. XII, 

 fig. 96). Spetsberge7i. Greenland. 



108. Synedra Kamtschatica Grun (Verh. 1862, pag. 404, 

 Pl. VIII, fig. 6). Spetsbergen Waijgats Ids. (30—80 fths). 



The strise are about 36 in 0,o2.5 m.m. 



109. Synedra Thalassotrix Cl. N. Sp. extremely long, 

 90—100 times longer than broad, linear. Ends (S.V.) some- 

 what rounded; striae faint about 25 in 0,02 5 m.m. Length 

 3 — 4 m.m. Breadth 0,04 2 m.m. 



This species occurs floating on tbe surface of the sea in 

 large masses. 



Northern Atlantic i;jat. 60° 25' Long. 19° 50' (Th. Fries) 

 Davis Strait Lat. 61° 45' Long. 53° 43'. 



Pl. IV, fig. 24 a, b, c. 



? 110. Synedra undulata (Bail) Greg (Diat. of Clyde pag. 

 531, Pl. XIV, pag. 107). Spetsbergen Kings Bay (160 faths) 

 rare. Not found in any other sample from the arctic sea. 



? 111. Synedra fulgens (Grev) Sm (Syn, I, pag. 74, Pl. 

 XII. fig. 103) Spetsbergen Kings Bay. 



? 112. Synedra chrystallina (Ag) Sm (Syn. I, pag. 74, Pl. 

 XII, fig. 101) Spetsbergen Kings Bay. 



? 113. Synedra superba (Kg) Sm (Syn. I, pag. 74, Pl. XII, 

 fig. 102) Spetshergen Kings Bay. 



? 114. Dimerogramma minus (Greg) Grun {Denticula mi- 

 nor Greg. Diat. of Clyde pag. 495, Pl. X, fig. 35) Spetshergen 

 Kings Bay (160 fathoms) rare. 



115. Fragilaria oceanica Cl. N. Sp. Elliptic-linear with 

 distinct marginal stria; (about 28 in 0,025 m.m.) ends rounded. 

 F. V. narrow-linear. 



