KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:() 5. 71 



sibly they are aberrant forms of Euastrum crassico/le Lund. (Desm. Succ. p. 23, t. II 

 f. 8), the apices bting a little incavate. 



119. C. pusillum, Bréb. {Euastrum pusillum, Bréb. Liste p. 125, t. I, f . 7 ; Cos. pusillum, 

 Archer in Prit. Inf. p. 731), var. retusum; apicibus incurvatis. 



Long. 13, lat, 11, lat. isth. 4 ti. T. X, f. 25. 



This little form differs somewhat from Bréb.'s figure, in being a little longer 

 than broad. 



forma? Long. 12, lat. 13.5, lat. isth, 5 ,«. T. X, f. 26. 



120. C. granatum, Bréb. (in Ralfs' Br. Desm. p. 96, t. XXXII, f. 6). 



Long. 21, lat. 17, lat. isth. 5 »j 



24, » 19, » 6 »J Frond smooth, basal angles a little more round- 



20, » 16, » » 4.5 » | ed than in Kalks' figure. 

 » 26, 20.5,» » 6.7 »J 



— — forma. Nordst. (Desm. Grön. p. 7, t. VII, f. 1?). 

 Long. 31, lat. 20, lat. isth. 6 //. T. X, f. 27. 



The forms of this species appear to be eommon in Bengal; I have it also ex 

 Utricularia stellari, from Malabar, comra. G. v. L. 



121. C. abruptum, Lind. (Desm. Suec. p. 43, t. II, f. 22) />' (jostyniense Racib. (Desm. 

 Polon. p. 24, t. II, f. 13), sed membrana aehroa. 



Long. et lat. 13, lat. isth. 4 u. T. XI, f. 8. 



122. C.J sp. C. parvum; semicellulse, a. basi vissa, indistincte octagonae; apicibus late 

 triangularibus, medio protruso; super quumque angulura tuberculo min ut o instructae. 

 Zvgospora globosa, processubus parum longis, apice bitidis, apud marginem 12 — 13 

 visis, arinata. A f rönte a G. C. W. non observatum. Euastri sp.? 



Bas. cell. lat. 20, lat. isth. 7, crass. 13, diam. zvg. c. proc. 35, s. proc. 25 ,«. 

 T. XX, f. 8 (fide G. C. VY. Mscr. No. 194). 



123. C? sp. C? zvgosporam egregiam habens. Zvgospora rotundato-triangularis; a fine 

 visa fere orbicularis; j)rocessubus brevibus tenuibus minute sub-eapitatis armata, circ. 

 15 apud marginem positis. Semicelluhv longe elliptica?, glabrse, medio tumida?. 



Bas. cell., lat. 20.5, crass. 12; zyg. long. c. proc, 30, s. proc. 19; long. proc. 5.5 /u? 

 T. X, f. 62 (fide G. C. W. Mscr. No. 153 b) x circ. 600. 



124. (J. Meneghinii, Bréb. (in Ralfs' Br. Desm. p. 96) f. tricrenata (Euastrum crenulatum 

 Xäg. Einz. Alg, p. 120, t, VII a, f. 7 c). 



Long. 1K, lat. 13, lat. isth. 4 ,</. T. VIII, f. 25. 



Bengal; also from the same district, ex Utricularia flexuosa, coniin. G. v. L.; 

 this is of larger size 1. 26—29, lat. 18—20 ,". 



f. typica (Ralfs 1. c. t. XV, f. 6). 



Long. 26, lat. 20, lat. isth. 5 fi. 



125. V. putealc, n, sj». C. parvum, vix l7g~plo longius quam latum, ovale; semicellulas 

 longe avätas ve] semicirculares, ajjicc truncata», angulis basalibus sub-acute et superi- 

 oribus late rotundatis; marginem versus aculeis parvis (circ. 15) et apice (circ. 6) 

 instructa?, margine laterale seriem duplicem aculeornm ]»arvorum (5 binatim vel 



