KONGL. SV. VKT. AKADKMIENS HANDLINGAK. BAND 27. N:0 3. 159 



A similar, not described, and iusuiliciently figured, form seems to be M. oldusa car. /luviu- 

 tilis Brun in A. S. Atl. CLXXXVIII f. 18. 



75. M. aiitiqiiii Ci.. (IS93). — V. rbomljoid. L. 0,o8; li. (),t(:i mm. Median line .slightly 

 undulating. Axial area a narrow, lanceolate space. Loculi Gin (),oi mm., equul, quadrate, forming 

 a band in.side the margin and ending at some distance fi'om the extremities. Stria; 18 in 0,01 

 mm. parallel, very slightly radiate at the ends, punctate; puncta 18 in 0,oi mm., forming undu- 

 lating longitudinal rows. — Diatomiste II p. 16 PI. I f. 19. 



Marine: Karand, Hungary, fossil (Deb}' Coll.)! 



76. M. cruciata Leud. Forth. (1879). - V. rhomboid. L. 0,08.'-, to 0,122; B. O^o.'i.-? to 0,u.'>7 

 mm. Central nodule transversely dilated into a stauros, not reaching to the margins. Median 

 line slightly undulating. Loculi? Lateral areas large, semilanceolate, crossed by faint striee. 

 Strise marginal and axial. Marginal strisB 8 to 9 in 0,01 mm. punctate; puncta 12 in 0,01 mm. 

 Axial striee short. — Nav. erne. Leud. Fortm. D. Ceylan p. 25 PI. II f. 19. Mast. cruc. Cl. Dia- 

 tomiste I p. 65 PI. X f. 4 (1891). A. 8. Atl. CLXXXVII f. 50. 



Marine: Ceylon (Le Tourneur Coll.)! Manilla (Deby Coll.)! Philippines! 



77. M. Craveui Leud. Fortm. (1879). — V. rhombic-lanceolate. L. O.in; B. 0,0.56 to 0,06 

 mm. Median line almost straight. Central area irregularly rounded, moderately large. Loculi? 

 Latei'al areas large, with numerous and irregular longitiidinal rows (about 7 in 0,oi mm.) of 

 elongated puncta. Striie marginal and axial. Marginal strife 12 in 0,oi mm. punctate; puncta 

 about 14 in Ooi mm. — Navicula Crav. liEUD. Fortm. D. Ceylan p. 25 PI. II f. 20. Mastogl. 

 Crav. Cl. Diatomi-ste I p. 66 PL X f. 5. 



Marine: Colombo, Ceylon (Le Tourneur Coll.)! 



78. M. Leudugeri Cl. a. Gtrove (1891). — V. rhombic-lanceolate. L. 0,12; B. 0,o6 mm. 

 Median line undulating. Central area small, subquadrate. Axial area very narrow. Loculi 3 in 

 0,01 mm., quadrate, equal, forming a band, reaching to the extremities. Lateral areas broad, semi- 

 lanceolate, with numerous longitudinal rows (about 7 in 0,oi mm.) of short striae. Stride marginal 

 and axial, 14 in 0,oi mm. punctate; puncta 15 in 0,oi mm. forming undulating, longitudinal rows. 

 - Diatomiste I p. 65 PL X f. 3. A. S. Atl. CLXXXVI f. 13. 



Marine: Macassar Straits! Singapore! Java! 



79. M. lemnlscata Leud. Fortm. (1879). — V. rhombic-lanceolate. L. 0,o.'> to 0,o88; B. 0,025 

 to 0,04 3 mm. Median line slightly undulating. Loculi 5 to 6 in 0,oi mm. quadrate, forming a 

 band reaching to the ends. Central area small, quadrate. Lateral areas large, semilanceolate, 

 with a few (3 to 4) longitudinal rows of short strise. Striae 15 to 16 in0,oi mm. punctate; puncta 

 15 to 20 in 0,01 mm. - D. de Ceylon p. 35 PL III f. 29. A. S. Atl. CLXXXVI f. 14. Icon. n. 

 PL II f. 26. M. decora Leud. Fortm. 1. c. f. 32. 



Marine: Madagascar (Van Heurck and Kinker Coll.)! Cejdon! Sumbava (Kinker Coll.)! 

 Manilla (Deby Coll.)! Macassar Straits (Grove Coll.)! Carpentaria Bay! Japan! Colon (Deby^Coll.)! 



80. M. jJivanica Cl. (1893). — V. rhomboid-lanceolate. L. 0,u; B, 0,032 mm. Median line 

 slightly undulating. No axial or central areas. Loculi 3 in O,oi.mm. equal, rectangular, forming 

 a narrow band, reaching to the ends. Striae 16 in 0,oi mm. parallel, slightly radiate at the ends, 

 composed of elongated puncta, forming longitudinal, parallel, straight rows, 12 in 0,oi mm. Sur- 

 face of the valve with a shallow, narrow, longitudinal depression, close to the median line. The 

 longitudinal rows of puncta are more distant on the depression. — A. S. Atl. CLXXXVIII f. 38. 

 Icon. n. PL II f. 22, 23. 



Marine: Java! Sumatra (Grove Coll.)! 



