642 MR. W. JOSHUA ON BURMESE DESMTUTE.E. 



S. sexangulabe, Bulnh., n. var. (Plate XXTII. fig. 24.) 

 S. bifubcum, n. sp. (Plate XXIII. figs. 25-28.) 

 S. parvum, forma variabili, brachiis duobus aut tribus in- 

 structum ; cytiodermate granulato, marginibus serratis : senii- 

 cellulis a fronte conspectis cuneatis ; basi lata ; ad latera singula 

 lobi apicalis spino majore instructis ; lobo basali inflatione sub- 

 globosa. Longit. 23-48 /u, latit. 35-73 p. 



Small, variable in outline, sometimes with two, sometimes three 

 arms ; cytioderm granulate, margins serrate ; semicells in front 

 view euneate, with broad base, furnished at each side of apical 

 lobe with a larger spine ; basal lobe with subglobose inflation. 

 Its nearest relation is with S. incisum, Wolle. Length 23-48 /i; 

 breadth 35-73 p. 



S. CUSPIDATUM, /3. DIVERGENS, JVordst. 



* 



S. los gispinum, Arch. 



S. ctathodes, n. sp. (Plate XXIII. figs. 22 & 23.) 



S. mediocre: semicellulis cyathiformibus, triangularibus, 

 brachiis longe productis, profunde fissis et trifurcatis, medio 

 profunde constrictis, puncto junctionis minuto, a vertice con- 

 spectis, brachiis minute granulatis, granulis seriebus tribus 

 dispositis: membrano baud omnino laevi. Longit. sine spinis 

 30 p, latit. sine brachiis 22 p : longit. ab apicibus 64-74 ft, latit. 

 ab apicibus 47-50 p : ? connexionis isthmi latit. 3 p. 



Medium size : semicells cyathiform, triangular, with long pro- 

 duced arms, deeply cleft and tri furcate ; deeply constricted at 

 middle, point of juncture very small ; in end view with minute 

 granulations on arms arranged in three rows ; membrane not 

 perfectly smooth. Length without spines 30 p; breadth without 

 arms 22 p; length from apices 64 jj, 74^; breadth from apices 

 4:7 fj, 50 p; width of connection S p. 



S. bacillabe, Breb. 



S. bejectum, Breb., 3. connatum, Lund. 



S. inconspicuum, Nordst. 



S. punctulatum, Breb. 



S. cvrtocf.rum, Breb. 



8. dilatatum, Ehrenb. 



S. striolatum, Naeg. 



S. TEL1FEUUM, Balfg. 



S FURCUI.OSTELT.ATUM, Behisch. 



