— 176 — 



77. C. exile West & G. S. West. Dysphinctium exile Turner in 

 Kongl. Sv. Vet.-Akad. Handl. Bd. 25, no. 5, 1893, p. 40, t. I, f. 21 * 



Forma curta; cellulis diametro subduplo longioribus. 

 Long. 13 — 15/i; lat. 7,5 — 8,5: lat. isthm. 5,9— 6,3 //. 



In stagnant water amongst various Algæ. 

 Area: India. 



78. C. pseudarctoum Nordst. in Wittr. & Nordst. Alg. Exsicc. no. 257 

 cum fig. xylogr. 1879. 



Forma australis West & G. S. West. C. subarctoum (Lagerh.) Racib. 

 forma australis Racib. in Rospraw. Wydz. matem.-przy. Akad. Umiej. 

 Krakow, tom. XXII, 1892, p. 363, t. VI, f. 22. 



Long. 13,5 — 17/z; lat. 8,5 — 10//; lat. isthm. 7 — 8,5//. 



On rocks in riverbed amongst C. læve Rabenh. and C. Schmidtii n. sp. 

 Racib orski's Australian plant is decidedly a form of C. pseudarctoum Nordst. 

 Area: Europe, Australia. 



79. C. pseudoconnatum Nordst. in Vidensk. Medd. f. d. naturh. Foren. 

 Kjøbenhavn, 1869, no. 14, p. 214, t. Ill, f. 17. 



Long. 59 fi ; lat. 42,5 jul; lat. isthm. 38 jjl. 

 In muddy ricefields. 



Area: Europe, N. and S. America, India, Ceylon, Madagascar. 



80. C. subturgidum (Turner) Schmidle in Hedwigia, Bd. XXXIV, 

 1895, p. 300. Dysphinctium subturgidum Turn, in Kongl. Sv. Vet.-Akad- . 

 Handl. Rd. 25, no. 5, 1893, p. 40, t. VII, f. 4. 



Forma minor Schmidle 1. c. t. IV, f. 2. 

 Long. 96 //; lat. 52/*; lat. isthm. 49//. 



In stagnant water amongst Spirogyra decimina var. 

 Area: E. Africa, India, Sumatra, Java, Samoa, Australia. 



Staurastrum Meyen. 



81. S. apiculatum Rréb. in Mém. Soc. Sei. Nat. Cherbourg, IV, 1856, 

 p. 142, t. I, f. 23; West & G. S. West in Trans. Linn. Soc. bot. ser. 2, 

 V, 1896, p. 254, t. XVI, f. 6. 



Long, sine spin. 21//; lat. sine spin. 21 //; long. spin. 1,5 /jt; lat. 

 isthm. 6,5 jut. 



Area: Europe, N. America, India, Japan. 



82. S. bifidum Ralfs in Ann. Mag. Nat. Hist. V, 1845, p. 151, t. X, 

 f. 3; Lund, in Nova Acta Soc. Scient. Upsala, ser. 3, VIII, 1871, p. 62, 

 t. IV, f. 2. 



