KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 27. N:0 3. 155 



50. M. bisulcata G-run. (1877). — V. elliptic-lanceolate, rostrate. L. 0,oi7 to 0,o3; B. 0,o9 

 to 0,011 mm. Loculi 5 to 6 in 0,oi mm., of equal size, quadrate, forming bands not reaching to 

 the extremities. Median line undulating. Strise 10,5 in 0,oi mm. slightly radiate, finely punctate, 

 crossed on both sides of the median line by a narrow, arcuate fnrrow. — M. J. 1877 p. 176 

 Pl. CXCV f. 6. 



Marine: Honduras (Grun.). 



Var. corsicana Grun. (1878). — V. elliptic-lanceolate, apiculate. L. 0,025 to 0,032; B. 0,oo8 

 to 0,011 mm. Loculi 5 in 0,oi mm. Median line slightly undulating. Strite 14 to 15 in 0,oi mm. 

 crossed by one or two, narrow, longitudinal furrows. — M. corsic. Grcn. Cl. M. D. N:o 153. M. 

 bisulc. var. cors. GtRUN. V. H. Syn. Pl. IV f 28. 



Marine: Mediterranean ! 



51. M. riinosa Cl. (1893). — V. rhombic-lanceolate, with apiculate ends. L. 0,03?; B. 0,oi3 

 mm. Median line flexuose. Axial area narrow, distinct. Loculi rectangular, about-lO in 0,oi mm., 

 forming a broad band, reaching to the apiculi. Strise 11 in 0,oi mm. slightly radiate, convergent 

 at the ends and crossed by a longitudinal furrow, not distinctly punctate. — Diatomiste vol. II 

 p. 15 Pl. I f 15. A. S. Atl. CLXXXVIIl f. 25. 



Marine: Bahamas (Grove Coll.)! 



52. M. Groésii Cl. (1878). — V. elliptical with rostrate to capitate ends. L. 0,o36 to 0,o6; 

 B 0,013 to 0,0 2 mm. Loculi 8 in 0,oi mm., forming a narrow marginal band reaching to the 

 apices. Median line straight. Areas not distinct. Strite 16 to 18 in 0,oi mm. of elongated pnneta 

 forming parallel, longitudinal rows, about 12 in 0,oi mm. — Nav. Goesii Cl. West Ind. D. p. 6 

 Pl. I f. 7. Mastogl. Goesii Cl. Diatomiste I p. 160 Pl. XXIII f. 6. A. S. Atl. CLXXXVIIl f. 23? 



Marine: Seychelles (Van Heurck Coll.)! Cebu, Philippines! West Indies! 



53. M. uudulata Grdn. (1860). — V. broadly lanceolate, rostrate. L. 0,o3 to 0,045; B. 0,012 

 to 0,018 mm. Loculi 9 to 12 in 0, 01 mm. equal, forming bands, reaching to the apices. Median 

 line strongly undulating. No distinct areas. Strise 17 to 18 in 0, 01 mm., almost parallel, of 

 elongated puncta, forming longitudinal rows, about 9 in 0, 01 mm. — Verh. 1860 p. 576 Pl. VII 

 f. 5. M. J. 1877 p. 176 Pl. CXCV f. 5. Perag. D. Villfranche p. 44 Pl. III f. 24. 



Marine: Mediterranean Sea! Adriatic! Seychelles (Grun.), Australia and Oceania (Grun.), 

 Honduras (Grun.). 



54. M. rhorabica Cl. (1883). — V. rhomboid, with a shallow longitudinal depression on each 

 side of the median line. L. 0,o48; B. 0, 02 mm. Loculi 6 in 0, 01 mm. equal, quadrate, forming 

 bands reaching to the ends. Median line undulating. Strise 11 in 0, 01 mm. coarsely punctate; 

 puncta 17 in 0,oi mm. forming undulating longitudinal rows. — Vega p. 494 Pl. XXXV f. 9. 



Marine: Labuan! 



55. M. affirinata Leud. Fortm. (1879). — V. rhomboid to lanceolate. L. 0,o7 to 0,085; 

 B. 0,035 to 0,04 mm. Median line undulating, unilaterally dilated at the central nodule. Loculi 

 9 to 11 in 0,01 mm., equal, forming broad bands, reaching to the ends. Strise 10 in 0, 01 mm., 

 parallel or slighly radiate at the ends, crossed by parallel longitudinal strise, 8 to 9 in 0,oi mm. 

 — Navic. affirm. Leud. Fortm. D. de Ceylan p. 24 Pl. II f. 22. M. affirm. Cl. Diatomiste I 

 p. 162 Pl. XXIII f 15. M. squamosa Br. A. S. Atl. CLXXXVIIl f 19, 31 (1893). 



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



56. M. bahamensis Cl. (1893). — V. rhombic-lanceolate. L. 0,045; B. 0,022 ram. Median 

 line dilated near the central nodule. Loculi 12 in 0, 01 mm., equal, rectangular, forming a band, 

 which reaches the ends of the valve. Strise 13 in 0, 01 mm., composed of coarse, elongated puncta, 

 forming longitudinal, or irregularly decussating, rows, about 8 in 0, 01 mm. — Diatomiste II p. 16 

 Pl. I f. 17. A. S. Atl. CLXXXVIIl f. 20, 21. 



Marine: Bahamas (Grove Coll.)! 



