280 MESSRS. W. WEST AND G. S. WEST ON 
I. GONATOZYGON, De Bary. 
1. G. AcuLEATUM, Hastings, in Amer. Month. Mier. Journ. 
(1892) p. 29; West & G. S. West, in Trans. Linn. Soc. Ser. lI. 
(Bot.) v. p. 230, pl. 12. ff. 1, 2. 
Hab. Laconia, N.H., frequent in pond. 
2. G. rrrosuM, Wolle, Desm. U. S. p. 22, pl. 1. f. 2. 
Lat. 14 p. 
Hab. Lamp Mortar Rock, Fairfield, Conn., scarce (H. J. 
no. 192). 
3. G. Rarrsrt, De Bary, Conj. pp. 76-7, t. iv. ff. 23-25. 
Lat. 10 y. 
Hab. New Baltimore, Mich. (H. J. no. 273). Holderness, 
N.H., scarce. Wake Forest, N.C., common (H. J. no. 534). 
Cold Spring Harbour, N.Y. (H. J. no. 144). 
4. G. Brésrssontt, De Bary, l. c. p. 77, t. iv. ff. 26, 27. 
Lat. 6-8 u; long. cell. 136-160 u. 
Hab. De Land, Florida, very rare. Seattle, Wash. Laconia, 
N.H. 
II. SPIROT/ENIA, Zréb. 
5. S. coxpENsATA, Bréb. in Ralfs, Brit. Desn. p. 179, t. 94. E. 1. 
Lat. 18-24 y. 
Hab. Fairfield, Conn., not rare with Mougeotia sp. in Mill River 
(H. J. no. 173). Cold Spring Harbour, N.Y., frequent in lower 
pond. Wake Forest, N.C., very scarce. Cœur d’Alene, Idaho, 
scarce in pool by crest (H. J. no. 621). 
Forma MINOR. 
Lat. 12-15 p. 
Hab. De Land, Florida, scarce. 
III. MESOTJENIUM, Wag. 
6. M. Macrococcum, Roy et Biss. in Ann. Scot. Nat. Hist. 
Oct. 1894.—Palmogloea macrococea, Kütz. Phycol. Germ. P- 153 
(1845); Tab. Phyc. i. t. 24. f. 2.— Mesotsnium Braunii, De Bury 
Conj. p. 74, t. 7. A. ff. 1-8 (1853). 
Lat. 12 y. 
Hab. Near Whitmore Lake, Northfield, Mich. (H. J, no. 146). 
