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



81. M. obesa Cl. (1893). — V. bx'oadly lanceolate, acuminate. L. 0,04; B. 0, 024 mm. Me- 

 dian line slightly undiilate. Axial area very narrow. Central area quadrate, extending into 

 narrow, hmate lateral areas. Loculi 6 in 0, 01 mm. equal, quadrate forming a band, ending near 

 the extremities. StrifE 12 in 0,oi mm. composed of coai'se and distant puncta. Between the striae 

 and the lateral areas are a few rows of elongated puncta. — Diatomiste II p. 15 Pl. I f. 16. 



Marine: Java! 



82. M. Temperei Cl. (1890). — V. elliptic-lanceolate. L. 0,ii; B. 0,o4 mm. Median line 

 undulate. Axial and central areas indistinct. Loculi? Lateral areas lunate with about 5 undu- 

 lating longitudinal rows of elongated puncta. Strise 10 in 0, 01 mm. punctate; puncta 10 in 0,oi mm. 

 forming undulate longitudinal rows. — Diatomiste I p. 23 Pl. III f. 3. 



Marine: Japan, fossil! 



Nearly akin to M. JelinecJcii, probably a variety of it. 



83. M. Jelineclvii G-rdn. (1863). — V. rhombical. L. 0,o6 to 0,ii; B. 0,025 to 0,045 mm. 

 Median line almost straight. Axial area small, transverse. Loculi 3 to 4 in 0, 01 mm. delicate, 

 with rounded interiör edges, forming a narrow band, reaching to the apices. Lateral areas large, 

 with faint prolongations of the strise. Striee 13 to 14 in 0, 01 mm punctate; puncta 10 to 18 in 

 0,01 mm. forming irregular, oblique rows. — Navic. Jel. Geun. Verh. 1863 p. 151 Pl. V f. 12. 

 Mastogl. Jel. Grun. Novara p. 99 Pl. I f. 11. T. M. Soc. 1877 p. 174 Pl. CXCV f. 1. A. S. Atl. 

 CLXXXVII f. 49. Nav. quarnerensis var. dilatata .Petit D. Campbell p. 21 Pl. V f. 24? Nav. 

 sitbrhomboidea Castr. Voyage challenger D. p. 30 Pl. XX f. 4? Mastogl. Jel. var. italica B. A. S. 

 Atl. CLXXXVII f. 48. 



Marine: Mediterranean Sea! Seychelles (Van Heurck Coll.)! Madagascar (Van Heurck CoU.)! 

 Java! Sumbava (Kinker Coll.)! Manilla (Deby Coll.)! China! West Indies! Brazil! 



Var. fossilis Cl. — L. 0,07; B. 0,03 mm. Strise 12 in 0,oi mm. the median alternately 

 longer and shorter. Puncta 14 in 0,oi mm. 



Marine: Russia, fos.sil (Deby Coll.)! 



Var. marina (Jan. a. Rabh.?) Cl. — V. rhomboid. L. 0, 04 to 0,07; B. O.017 to 0, 025 mm. 

 Loculi 4 to 5 in 0, 01 mm. Lateral areas narrow, frequently with a row of short strise at their 

 exteriör edges. Striee 17 to 18 in 0, 01 mm. finely punctate; puncta 25 in 0, 01 mm. Nav. mar. 

 Jan. Rabh. D. Honduras p. 10 Pl. II f. 16? Icon. n. Pl. II f. 18. 



Marine: Honduras (Jan. Rabh.), Manilla (Deby Coll.)! Java! Philippines (Grove Coll.): 



84. M. submarginata Cl. and Grun. (1881). — V. lanceolate subacute. L. 0,04 to 0,055; 

 B. 0,017 to 0,018 mm. Median line straight. Central area quadrate, merging into the lunate, 

 structureless, or faintly striate, large lateral areas. Loculi rudimentary 5 to 8 in 0, 01 mm. Strite 

 19 in 0,01 mm. punctate; puncta 23 in 0, 01 mm. — N. R. D. p. 4 Pl. 1 f. 2. 



Marine: Galapagos Islands! Campeachy Bay (Grun.). 



85. M. Kellerii Pant. (1889). — V. elliptic-lanceolate. L. 0,09 to 0,12; B. 0,o33 to 0,03c 

 mm. Median line undulate. Central and axial areas small or indistinct. Loculi 4 in 0, 01 mm., 

 equal, quadrate, forming a band extending along the wliole margin. Depressed lateral areas lunate 

 with crowded longitudinal rows (6 in O.oi mm.) of short strite. StritE 14 to 15 in 0,oi mm. punc- 

 tate; puncta about 10 in 0,oi mm. — Navicula Kellerii Pant. II p. 49 Pl. XXIII f. 351. 



Marine: Hungary, fossil, Bory! 



86. M. Japonica Cl. (1892). — V. elliptic-lanceolate. L. 0,o45 to 0, 005; B. 0,02 to 0,027 

 mm. Median line strongly undulate. Axial area narrow, distinct. Loculi 6 in 0,oi mm. equal, 

 quadrate, forming a band, ending in the apices. Stria; Ki in 0,oi mm., of elongated puncta, 

 forming longitudinal parallel rows, l2 in 0,oi mm.; the two rows next to the median line more 

 diatant. ~ Diatomiste 1 p. 162 Pl. XXIII f. 16. 



Marine: Japan (Tempére)! 



