SPECIES OF DESiMIDS. 97 



d. Basal lobe deeply notched; basal lobule broadly marginate; c<=,ntral 

 lobule obtsue.. . .... multilobatum, 98 



d. Basal lobe undulate (;«). 



d. " rounded or angular (f). 



e. Margins smooth [k). 



e. " cuspidate, spinulose or beaded (/). 

 /. Basal lobe undulate (w). 



f. " rounded or angular (x). 



g. Margins smooth (/) 



g. " cuspidate, spinulose or beaded (j). 



h. End lobes horizontal; diam. 45-50/* . . Nordstedtianum, 105 



h. " " " diam. 35-40/* spitiosum, 106 



h. " " upright, diverging ... . . . forinosum, 103 



i. Basal lobes deeply notched (j). 

 /. " undulate (z). 



j. Cytioderm rough with conic granules; semi-cells with one large 

 central inflation, a smaller one on each side, two on end lobe, 



verrucosum, 100 

 d. Basal lobes undulate {cc). 

 k. " rounded or angular (ee). 



I. A short spine on the angles of end and basal lobes divaricatum, 104 

 /. A small projection on each side near the apex . compactum, 107 

 m. Cytioderm more or less tuberculate («). 

 m. " punctate (0). 



m. " smooth [r). 



n. Tubercles basal, mostly 5 . . . circulare, loi 



n. " 5 central, 4 marginal . . elegans, io6 



n. " scattered; end lobe with a tooth on each side, 



ornithocephahim. * 

 0. Semi-cell 5-lobed, basal lobe emarginate, the lateral small, entire, 



pinnatiim, 98 

 0. " not 5-lobed (/). 



/. Basal lobe with i lateral, subcentral tubercle, not emarginate, 



ampullaceum^ 100 

 /. Basal lobe without lateral tubercle, slightly emarginate, affine, 100 

 p, " " " " not emarginate; diam. 22-25/^, 



di delta, 99 

 p. " not emarginate; diam. 6o-6g/( . ventricosum. ** 



*Journ. R. Micr. Soc, Feb., 1886. 



