KONGL. SV. VET. AKADEMIENS IIANDLINGAIl. BAND. 27. N:() 3. 155 



50. M. bisulcata Grun. (1H77). — V. elliptic-lanceolatf% rostrate. L. (),ui7 to 0,o3; B. O.oo 

 to 0,0 11 mm. Loculi 5 to in 0,oi mm., of equal size, quadrate, forming bands not reaching to 

 the extremities. Median line undulating. Striae 10,.'j in 0,oi mm. slightly radiate, finely punctate, 

 crcssed on both sides of the median line by a narrow, arcuate furrow. — M. .1. 1H77 p. 17(j 

 PL CXCV f. 6. 



Marine: Honduras (Grun.). 



Var. corsicana Grun. (1878). — V. elliptic-lanceolate, apiculate. L. 0,02.5 to 0,032; B. 0,oo8 

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

 crossed by one or two, narrow, longitudinal furrows. — M. corsic. Grun. CI. M. D. N:o 153. 31. 

 bisitlc. var. cars. Grun. V. H. Syn. PI. IV f. 28. 



Marine : Mediterranean ! 



51. M. rimosa Cl. (1893). — V. rhombic-lanceolate, with apiculate ends. L. 0,o37 ; B. 0,oi3 

 mm. Median line flexuose. Axial area narrow, distinct. Loculi rectangular, about 10 in 0, 01 mm., 

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

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

 p. 15 PI. I f. 15. A. S. Atl. CLXXXVIII f. 25. 



Marine: Bahamas (Grove Coll.)! 



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

 B 0,0 13 to 0,02 mm. Loculi 8 in 0,oi mm., forming a narrow marginal band reaching to the 

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

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

 PI. I f. 7. Mastogl. Goesii Cl. Diatomiste I p. 160 PL XXIII f. 6. A. S. Atl. CLXXXVIII f. 23? 



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



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

 to 0,0 18 mm. Loculi 9 to 12 in 0,oi mm. equal, forming bands, reaching to the apices. Median 

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

 elongated puncta, forming longitudinal rows, about 9 in 0,oi mm. — Verb. 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. rhombica 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,oi mm. equal, quadrate, forming 

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

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



Marine: Labuan! 



55. M. aiiirmata Leud. Fortm. (1879). — V. rhomboid to lanceolate. L. 0,o- to 0,o85; 

 B. 0,0 3 5 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. Striae 10 in 0,oi mm., 

 parallel or slighly radiate at the ends, crossed by parallel longitudinal striae, 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. CLXXXVIII 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 mm. Median 

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

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

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

 PL I f. 17. A. S. Atl. CLXXXVIII f. 20, 21. 



Marine: Bahamas (Grove Coll.)! 



