!»2 W. B. TURNER, FRE8H-WATER ALG.K OF KANT INDIA. 



Species inter has duas sequentes; difficile est dicere cui harutu specierum veri- 

 sirniliter proxima! Formos duoe: 

 a. typica. Apicibus lobulorum bicuspidatis. T. Y, f. 6 a. 



Long. 1:50—145, lat 104—120, lat. isth. 18, lat, apic. 50, lat. lob. pol. 20 ,u. 

 />'. dentata. Apicibus lobulorum bidentatis. Fig. 6 b. 



Long. 135 — 140, lat. 115, lat. isth. 18, lat. apic. 54, lat. lob. pol. 19 ,u. 

 {Mic. cruzc-melitensis, Wallich, ex p., Mscr. No. 84, f. 1; Long. 130, lat. 104,". 

 The species occurs in Bengal, but seenis uncommon. It is a very close relative 

 of the two following species, but the regularly stellate, not sub-raniose, form at once 

 distinguishes it from them. 

 13. M. crux-melitensis, (Ehr.) Ralfs (Br. Desni. p. 73, t. IX, f. 3; Euastrum crux-mdi- 

 tensis Ehr. Abhl. Berl. Ak. p. 81, ex. p. 1831; Inf. p. 162, t. XII, f. 3 a b, non c; 

 Kutz. Phyc. Gerni. p. 134; Focke Phys. Stud. p. 64, t. I, f. 13; Micrastetias meli- 

 tensis Mem;h. Synopsis p. 216, No. 4; Euastrum divergens Bréb. in litt. fide Mengh. 

 1. c; M. furcata var. Wallich Beng. Desm. p. 280). 



Collectio Wallichiana varias formas Micrasteriee cruas^melitensis copiose continet. 

 Apicibus lobulorum bidentatis, rarissime bicuspidatis. 

 Forma a typica. Fere ut in speciminibus Europeis formata. 

 » /? compressa. Lobulis lateralibus sub-curtis. 



/ minor. Forma minor, lobo polari parum exserto. 

 <)' lata. Latior, in proportione, quam f. typica. 

 € robusta. Lobulis, et lobo polari, crassis. 



£ alata. Forma, lobis valde incisis, expansis; lobo polari parum exserto. 

 fj gracilis. Lobis valde incisis, tenuibus; lobo polari magis exserto. 

 T. V, f. 4. Dimensiones: 



Long. lat. lat. isth. lat. apic. lat. lob. pol. 



a 112 104 24 38 18 ,// f. 4 a 



{i 104 84 14 34 15 » » » b 



y 82 76 13 28 14 » » » c 



d 118 114 20 42 20 » » » d 



s 132 118 24 52 25 » » » e 



t 104 92 13 35 15 » » » f 



n 100 82 14 32 13 » » » g 



The filamentous condition is illustrated by the locking or intei - lacing of the fur- 

 cilhe' of the polar lobes, as in tig. 4h (after Wallich Mscr. No. 84, f. 2): Wallich 

 thinks that the sexually mature fronds cohere by the furcillae previous to conjugation. 

 A vertical view of the frond is given at T. XIX, f. 17 (crass. 23 — 26 /u). 



Wallich in Mscr. gives the size as long. 81, lat. 78 ,« =="f. y supra. Vide note 

 sub No. 14. 



Bengal; not in other garnerings. 



[Since compiling the above list of forms I have found that I have omittcd one 

 very peculiar specimen, long. 97, lat. 87 /u, with a distinct tooth 3 fi long on each side 

 of the apical concavity; the frond has dentate lobules. It might stånd as f. & evoluta.] 



