126 P. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. 



1. Smaller, mumie or hrachish forms, cnclosed in gclatinous fubcs (Berkeleya, Raphidogloea).^ 



1. A. rutilanis Trentepohl (1806). — V. short and imrrow, obtnse. linear-elliptical or linear- 

 lanceolate. L. 0,oi5 to (),u35; B. 0,oo4 to 0,oo6 mm. Forks about '^ as long a.s the length of 

 the valve. Strije 28 in O.oi ram., slightly radiate at the ends. — Conferva rutilans Trext. in 

 Roth Cat. III p. 179. BerMeya Billwynii V. H. Syn. p. 113 Pl. XVI f. 15. Schizonemu Dilhv. 

 W. Sm. b. D. II p. 77 Pl. LVIII f. 366. Berkel. obfusa V. H. Syn. 1. c. f. Ki and var. 

 adriatica f. 17, 18. '■-'<'i ■ 



Brackish and marine: Baltic (Gulf of Bothnia, at Torneå, Grotland, Bay of Finland)! Caspian 

 Sea (Grun.)! North Sea, English Channel! Mediterranean Seal Japan! 



Var. antarctica (Harw.) Grun. 1881. — Strite 36 in 0,01 mm. — Berhel. anfarct. Grux. in 

 V. H. Syn. Pl. XVI f. 20. BerJc. Harveyana Grun. 1. c. 14. Berh. parasiiica Grux. 1. c. f. 19. 

 Berh. finnica Dannf. Baltic D. Pl. II f. 19 (1882>? 



Marine: North Sea (Grun.), Falklands Islands (Grun.), Friendly Islands (Grun.). 



2. . A. micans Lynub. (1819). — V. linear, with broad and rounded ends, elongated. L. 0,065 

 to 0,125; B. 0,01 mm. Forks more than 1/3 of the length of the valve. Striee about 27 in O.oi 

 mm. - Bangia micans Lyngb. Tentamen hydrophytol. p. 84 Pl. XXV. BerMeya mic. Grun. in 

 V. H. Syn. p. 113 Pl. XVI f. 11. Berk. puniila V. H. Syn. 1. c. f. 13. BerJc. adriatica Grun. in 

 T. R. M. S. 1877 p. 180 Pl. CXCV f. 15. 



Marine: North Sea! Mediterranean Sea (Grun.), Adriatic (Grun.). 



Var. frngilis (Grev.) Grun. — Striee 32 to 36 in 0,oi mm. — Berhel. fragilis Grev. Scot. 

 Crypt. Fl. Pl. 294. V. H. Syn. Pl. XVI f. 12. 



Marine: North Sea (Grun.), Mediterranean Sea (Grun.). 



2. Larger, brackish or freshivater forms, free or in nwcous niasses (Amphipleura). 



3. A. pellucida Kutz. (1833). — V. fusiform, acute. L. 0,08 to 0,i4; 0,oo7 to 0,oö9 mm. 

 Forks 0,02 mm. Transverse strife 37 in 0,oi mm. — Fritsfnlia pelluc. Kutz. Linnea ^111 Pl. 13 

 f. 11. Dec. N:o 83 (1834) accord. to Lagerst. A. pellucida KliTZ. Bac. p. 103 (1844). W. Sm. 

 B. D. XV f. 127. Grun. Verh. 1862 p. 154. Grun. T. R. M. S. 1877 p. 179. V. H. Syn. p. 113 

 Pl. XVII f. 14, 15 A. 



Fresh and slightly laraekish water: Baltic (Gotland, Dannf. Torneå!), Sweden (Mälaren, 

 Vestergötland)! Finland! Belgium (V. H.), England (W. Sm.), Austria (Grun.), Switzerland (Brun.), 

 Japan ! 



Var. brasiliensis Cl. — L. 0,009; B. 0,oi mm. Forks 0,oi5 to 0,o:! mm. Transverse strise 

 33, longitudinal 27 in 0,oi mm. — A. Lindheimeri Grun. in Cl. M, D. N:o iS!!^. ' '"'" 



Fresh water: Brazil! Ecuador! 



Var. Lindheimeri Grun. (1862). — L. 0,i5 to 0,i6; B. 0,o24 mm. Forks 0,o36 mm. Terminal 

 nodules short. rounded. Transverse striis 26, longitudinal 26 in 0,oi mm. — A. Lindheim. Grun. 

 Verh. 1862 p.' 155 Pl. XIII f. 11. T. R. M. S. 1877 p. 179 Pl. CXCV f. 13. 



Fresh water: Texas (Grun.), Costa Rica (Grove). 



Var. intermedia Grun. (1877). — L. 0,oi9 to 0,2; B. 0,oi3 to O.oih mm. Forks 0,o44 mm. 

 Terminal nodules short rounded. StriEe somewhat finer than in var. Lindheimeri. — Grun. T. R. 

 M. S. 1877 p. 179. 



Fresh water: Oregon, fossil (Grun.). 



Var. oregonica Grun. (1877). — 0,33; B. 0,02 7 mm. Forks 0,o63 mm. Terminal nodules 

 elongated, linear. Striie as in var. Lindheimeri. — Grun. 1. c. p. 179. 



Fresh water: Oregon, fossil (Grun.). 



' See Gkunows Monograph in Bot. Centralblatt 1880 N:o ''/is- 



