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



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

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

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

 the extremities. Strise 12 in 0,oi mm. composed of coarse and distant puncta. Between the strige 

 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,n; 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. Striae 10 in 0,oi mm. punctate; puncta 10 in 0,oi mm. 

 forming undulate longitudinal rows. — Diatomiste I p. 23 PI. Ill f. 3. 



Marine: Japan, fossil! 



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



83. M. Jelineclcii Grun. (1863). — V. rhombical. L. 0,o6 to 0,ii; B. 0,o25 to 0,o45 mm. 

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

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

 with faint prolongations of the striae. Striae 13 to 14 in 0,oi mm punctate; puncta 10 to 18 in 

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

 Mastogl. Jel. Gedn. Novara p. 99 PI. I t 11. T. M. See. 1877 p. 174 PI. CXCV f. 1. A. S. Atl. 

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

 suhrhomboidea 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 Coll.)! 

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



Var. fossilis Cl. — L. 0,o7; B. 0,03 mm. Striae 12 in 0,oi mm. the median alternately 

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



Marine: Russia, fossil (Deby Coll.)! 



Var. marina (Jan. a. Rabh.?) Cl. — V. rhomboid. L. 0,04 to 0,o7; B. 0,oi7 to 0,025 mm. 

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

 exterior edges. Striae 17 to 18 in 0,oi mm. finely punctate; puncta 25 in 0,oi mm. Nav. mar. 

 Jan. Eabh. 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. (]881). — V. lanceolate subacute. L. 0,o4 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,oi mm. Strife 

 19 in 0,01 mm. punctate; puncta 23 in 0,oi 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 0,036 

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

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

 with crowded longitudinal rows (6 in O.oi mm.) of short striae. Striae 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. 0,045 to 0,065; 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. Striae 16 in 0,oi mm., of elongated puncta, 

 forming longitudinal parallel rows, 12 in 0,oi mm.; the two rows next to the median line more 

 distant. — Diatomiste I p. 162 PL XXIII f. 16. 



Marine: Japan (Tempere)! 



