r.o. I 



Kf)NGL. SV. VET. AKAOKMIRNS IIANnLINOAR. RANI) 27. N:() 3. 



.„ I Striae about 18 in 0,oi mm M. Jlexuosa Cl. 



' I — — 3;") — — M. cnspidata Cl. 



Valvt; apiiiilate M. minuta Gkun. 



— rostrate M. Sttiithii Thwaites. 



[ Valve rhomboidal U2. 



51. -j — linear vvitli cuneate ends M. elliptica v. Dansei. 



\ — elliptical to lanceolate 55. 



^„ j Loculi almost as close as the strise 53. 



' \ — less — than — 54. 



^ j L. about 0,04,'') mm M. hahamensis Cl. 



j L. abou 

 \h. - 



0,07.5 mm M. affirmata Leud. Fortm. 



( Loculi 4, 



54. ~ 



(Loculi 4, striae V6 in 0,oi mm M. Lancettula Cl. 

 — 4, — 21 — — M. RJwmbulus Cl, 



6, — 11 — — M. rhombica Cl. 



8, — 14 — — M. pnlchella Cl. 



j Loculi less than 7 in (),oi mm 5(i. 



\ — more than 7 — — 58. 



,p j Striae coarse, of distant puncta M. affinis Cl. 



{ 



58. I 



of close puncta 57. 



( Loculi lunate M. notata Pant. 



\ — rectangular M. laminaris Ehb. 



L. 0,o<i mm M. Portieriana Grun. 



L. 0,0.5 mm. or less 59. 



{ 



\ — convergent — — M. lanceolatn Thwaites. 



\ Terminal loculi equal in both ends 62. 



( Median loculi largest <j3. 



Loculi 3 in 0,oi mm M. kariana Grun 



. Striae about 15 in 0,oi mm M. elegans Lewis 



^^- ^ 20 - - 60. 



„ . Striae radiate in the ends M. elliptica Ag. (M. Smithii var.). 



^. . Loculi closer in one end than in the other M. inceqiialis Cl. 



„„ , Loculi between the middle and the ends largest M. erythrcea Grun. 



no 



^ about 8 in 0,oi mm 64 



I 



Valve linear M. pnsilla Grun. 



— elliptical M. floridana Cl. 



Valve with axial area 66. 



lateral areas 68. 



64. I 



,.p I Valve witl 



65. < 



,.,. , Axial area narrow 67 



bb 



{ 



broad M. entoleia Cl. 



._ J Loculi marginal M. japonicn Cl. 



\ — inside the margin M. antiqna Cl. 



.„ f Lateral areas structureless 69. 



1 — — punctate or striate 74. 



,.„ I Lateral and central areas uniting 70. 



''^ \ - - _ - not - 73. 



„. ) Central nodule stauroid 71. 



' I - - not - 72. 



[ Stri* 9 in 0,oi mm M. cruciata Leud. Fortm. 



71. -! — 17 — — M. euxifia Cl. 



I — 22 — — M. Mncdonaldii Grev. 



„(, J Striae finely punctate M. submarginafa Cl. a. Grun. 



\ — coarsely — M. bnldjlkinva Grun. 



I — 10 — — M. rimosa Cl. 



„, (Areas with faint puncta M. Jelineckii Grun. 



(4. < - 



Sv. Vet Akudeiiiieiis Handliiigar. Bd 27. N:o 3. 19 



_„ I Loculi 5 to 6 in 0,oi mm M. bisulcata Grun. 



73. j _ 



( Areas with 



longitudinal rows of elongated puncta 75. 



, , Rows of puncta few 76. 



numerous 78. 



