96 w. B. TURNEK, FRESH-WATER AU. .K OF EAST INDIA. 



Lundell gives long. 224, lat. 208 /u. 



Speciraen from Vestrogothia, 0. X. leg. Long. 224, lat. 216, lat. isth. 29, lat. 

 apic. 134, lat. lob. pol. 30 ,u. 



The last was a very fine speciraen sent to me by Dr. Nordstedt. Herc again 

 the Indian forms appear to be so much smaller, that the Européan ])lants cited, in 

 this and the last-named species, might stånd as »/>' major». 



I have not seen any specimen with nearly so extended a ventral process (either 

 in No. 18 ty])e, or this species) as that described b)- Laoerheim (Desm. Bteng. p. 5, 

 t. I, f. 1) under the name of .1/. Mahabuleslurarensis rar. />' surculiferti. 



Hvdrabad, J. S. 



Note. Nordstedt, in Fr. Alg. N. Z. pp. 30 — 31, has given an interesting re- 

 sumé of his own and Grunows views (Rabh.s Beitr. p. 14) upon this species and the 

 preceding one. My own arrangement stånds thus: 

 M. Mahabwleshwarensis, Hobs. Lobis lateralibus bi-sectis, dnplicibns. 

 «. Lobulis plus minus regulariter attenuatis. 



1. /'. ti/pica (Indica minor) Hmis. 1. 127, It. 105 u. 



2. ( intermedia) Nordst. (Alg. Char. p. 10), 1. 140, It. 114 .«. 



3. » ( » major) Turner, ut supra, 1. 155 — 164, It. 125 — 144 ,u. 



4. » brevior (Americana) Nordst. (N. Z. p. 31), 1. 105, It. 83 ,«. 



5. » Europcea Nordst. (Lund. Desm. Suee.), 1. 170 — 220, It. 160 — 190 ,«. 

 fi. Lobulis plus minus lageniformibus. 



C. /'. Novizelandica, Nordst. (N. Z. 1. c), 1. 200, lat. 160 ,«. (Mask. t. XI, f. 7). 

 y. Lobulis introrsum aculeato-emarginatis; attenuatis. 



7. var. excelsior (Wall.) Turner, 1. 130—145, It. 125—135 //. 

 M. Wallichii, Grunow. Lobis lateralibus tri-partitis, vel triplicibus. 

 «. Lobulis plus minus regulariter attenuatis. 



1. /'. typiea (Indica) Grunow. 1. 133, It. 115 ,«. 



2. /'. major (Europsea) Nordst. (Lund. Des. Suec), 1. 224, It. 208 ,«. 



/^. Lobulis plus minus lageniformibus. (Var. Hermanniana, Reinsch; M. Her- 

 manniana, Rnscii, Alg. Frank. t. VIII, f. 1; Sp. Alg. Fung. t. XXI, f. B.) 



3. var. Hermanniana, Reinsch 1. c. 1. 200, It. 154 fi. 



4. — — /. ampulfacea (Mask. N. Z. f. 6) 1. 200, It. 154 {M. Mahafatleékwa- 

 rensis fl ampullacea, Nordst. N. Z. t. II, f. 16 c). 



5. — — /'. Fijiensis, Nob. (Macdonald, Mscr. et litt. ad W. B. T. c. ic. Fiji, 

 1856); Maskell (On M. Americana, t. II, f. 12), 1. 200, It. 160 ,«, »f. in- 

 cisuris brevioribus». 



6. /. Spencerii, Nob. »marginibus non serratis» — M. ampullacea Mask. var. (i 

 Spencer (N. Z. Desm. p. 296, t. XXIII, f. 6), 1. 128, It. 96 /u. 



The tig. of Wolle (Desm. U. S. A. t. 32, f. 5) M. Åmencanä v. Hermanniana 

 (Wolle), cited by Nordstedt in Fr. Alg. N. Z. p. 31 as a form of these species, seems 

 to me only a deeply incised form of M. Americana Ehrb.; and it might probably be 

 better to call it /. incisa of that species. It is not the M. Hermanniana of Reinsi ii, 

 as the lobules are not lageniform. 



