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



69. M. Braimii Grun. (1863). — V. elliptic-lanceolate. L. 0,04 to 0,095; B. 0,oi4 to 0,027 

 mm. Central nodule large, quadrate, prolonged into narrow horns, as to form a lyriform figure. 

 Loculi 4,5 to 6 in 0, 01 mm. quadrate, equal, or the median larger, forming a band ending near the 

 extremities. Strite 18 to 22 in 0, 01 mm. parallel, radiate towards tlie ends, finely punctate; puncta 

 about 25 in 0,oi mm. — Verb. 1863 p. 156 Pl. IV f. 2. Dannf. Balt. D. Pl. I f. 4. V. H. Syn. 

 p. 71 Pl. IV f. 21, 22. A. S. Atl. CLXXXV f. 39, 40, 45; CLXXXVIII f. 4 to 12. M. Kins- 

 mannii Lewis Proced. Ac. Nat. Hist. Philad. p. 13 Pl. II f. 15 (1865). 



Brackisb water: Spitsbergen! Baltic! Caspian Sea! Saxony! Nortb Sea! Mediterranean, 

 Adriatic and Black Seas! Red Sea (Grun.), Japan! Pensacola! Cape May (Lewis). 



70. M. Delbyi Cl. (1892). — V. narrow, rhombic-lanceolate. L. 0,055; B. 0,oi4 mm. Median 

 line strongly flexuose. Central area quadrate, expanded into narrow, linear lateral areas, parallel 

 to the median line. Loculi 8 in 0,oi mm. qnadrate, forming a narrow band reacbing to the ends. 

 StricE 15 in 0, 01 mm. sligbtly radiate, finely punctate. — Diatomiste I p. 161 Pl. XXIII f. 11. 

 Nav. perducia Pant. III Pl. XVIII f. 262 (1893). M. rhomboidalis Pant. III Pl. XLI f. 563 (1893)? 



Marine: Karand, Hungary, fossil (Deby Coll.)! 



71. M. Ibaltjikiana Gkun. (188 ?). — V. elliptical to elliptic-lanceolate, subacute. L. 0,042; 

 B. 0,02 mm. Median line iindulating. Central area broad, transverse, merging into two narrow, 

 lunate lateral areas. Loculi 6 to 8 in 0, 01 mm., equal, rectangular, forming bands, ending at some 

 distance from the apices. Strife 16 to 17 in 0,oi mm., slightly radiate, coarsely punctate; puncta 

 about 16 in 0, 01 mm. — M. Braunii var. baltjikiana Gedn. in V. H. Types N:o 545. M. haltj. 



A. S. Atl. CLXXXVIII f. 2. Icon. n. Pl. II f. 11. M. Pethöi Pant. III Pl. XXXVII f. 519 

 (1893). M. neogena Pant. IH PL XLI f. 559 (1893). M. Kinherii Pant. III Pl. XLI f. 562 (1893). 

 Navicula Orphei Pant. III Pl. XLII f. 580 (1893). 



Marine: Baltjik, foss. ! 



Var. bullata Cl. — Areas with some few scattered, large puncta. L. 0,09; B. 0, 024 mm. 

 Strise 17 in 0,oi mm. Puncta 16 in 0,oi mm. 

 Marine: Russia, fossil (Deby Coll.)! 



72. M. Macdonaldii Grbv. (1865). — V. lanceolate to rhomboid, subacute. L. 0,035 to 0,045; 



B. 0,013 to 0,017 mm. Median line slightly undulating. Central nodule transversely dilated into 

 a broad stauros. Loculi 3 in 0, 01 mm., decreasing in size towards the extremities and with slightly 

 rounded interiör edges. Strife 22 in 0, 01 mm. slightly radiate throughout, crossed by lax'ge, semi- 

 lanceolate areas, punctate; puncta about 22 in 0, 01 mm. forming somewhat undulating longitudinal 

 rows. — T. Bot. Soc. Edinb. Vol. VIII p. 237 Pl. III f. 15. A. S. Atl. CLXXXVII f. 42, 43. 

 Icon. n. Pl. II f. 21. 



Marine: Corsica! Adriatic! Philippines! Australia (Grav.). 



73. M. euxina Cl. (1892). — V. lanceolate. L. 0,o7; B. 0,o26 mm. Median line undulating. 

 Axial area narrow. Central nodule transversely dilated into a short stauros, Axial area narrow; 

 central area prolonged into the narrow, lunate lateral areas. Loculi 5 in 0, 01 mm. equal, quadrate, 

 forming a band reaching nearly to the ends. Strite 17 in 0, 01 mm. coarsely punctate; puncta 

 about 18 in 0, 01 mm. forming undulating longitudinal rows. Axial stria; short. — Diatomiste I 

 p. 160 Pl. XXIII f. 9. 



Marine: Baltjik, fossil! 



74. M. entoleia Cl. (1892). — V. lanceolate. L. 0,07; B. 0,025 mm. Loculi 4 in 0,01 mm. 

 of equal size, reotaiignlar, forming bands ending at some distance from the extremities. Median 

 line undulating. Axial area lanceolate, moderately broad. Strifc 17 in 0, 01 mm. punctate; puncta, 

 about 14 in 0, 01 mm., forming longitudinal undulating rows. — Diatomiste I p. 160 Pl. XXIII 

 f. 8. A. S. Atl. CLXXXVIII f. 15 to 17. 



Marine: Baltjik, foss.! 



