166 MESSRS. W. WEST AND G. S. WEST ON 
Long. 15-18 u; lat. 11°5-12°5 u; lat. isthm. 2°8 u. 
Hab. In artificial tank, Peradeniya. 
Var. SEPTENTRIONALE, Wille, in Ofvers. K. Vet.-Akad. Fórh. 1879, no. 5, p. 43, t. 12. 
fig. 94; G. S. West, in Journ. Linn. Soc., Bot. xxvii. 1899, p. 387, t. 10. figs. 7-9. 
ilab. Pond, Royal Botanical Gardens, Peradeniya. 
168. COSMARIUM MENEGHINII, Bréb. in Ralfs, Brit. Desm. 1848, p. 96, t. 15. fig. 6. 
Hab. ln artificial tank, Peradeniya. 
169. CoSMARIUM NORIMBERGENSE, heinsch, in Abhandl. naturhist. Gesellsch. Nürnberg, 
iii. 1866, p. 113, t. 9. fig. 2. C. Hammeri, Reinsch, var. octogibbosum, Reinsch, 
l. c. p. 112, t. 10. fig. 1. C. octogibbosum, W. B. Turn., 1892. C. octogibbosum, 
var. indica, W. B. Turn., 1892. 
Long. 15-15:5 u : lat. 1255-133 4 ; lat isthm. 3°5-4°3 p; crass. 67-14 u. 
Hab. Paddyfield between Kosgoda and Urahaighasmahendai. 
All the specimens observed were more depressed than normal examples. 
170. CoSMARIUM PUSILLUM, Arch. in Pritch. Infus. ed. 4, 1861, p. 731. Huastrum 
pusillum, Bréb. in Mém. Soc. Sci. Nat. Cherbourg, iv. 1856, p. 125, t. 1. fig. 7. 
Long. 6:8-9:6 u; lat. 7-8°8 u; lat. isthm. 2:7-3 u; crass. 4°5 p. 
Hab, With the preceding species. 
171. CosMARIUM MINIMUM, West & G. S. West, in Trans. Linn. Soc., Bot. ser. 2, v. 1895, 
p- 58, t. 8. fig. 10. 
Hab. With the preceding species. 
172. CosMARIUM EXIGUUM, Arch. in Proc. Dubl. Nat. Hist. Soc. iv. 1864, p. 49, t. 1. 
figs. 32, 33; Nordst. in Bih. K. Sv. Vet.-Akad. Handl. xxii. 1888, no. 8, p. 58, 
t. 6. fig. 12. 
Hab. Pond, Royal Botanical Gardens, Peradeniya. Paddyfield between Kosgoda and 
Urahaighasmahendai. 
173. CosMARIUM PSEUDEXIGUUM, Racib. in Pamietnik Akad. Umiej. w Krakow, Wydz. 
matem.-prz. x. 1885, p. 71, t. 10. fig. 8. 
A slightly smaller form: long. 15 p; lat. 7:5 u; lat. isthm. 23 p. 
Hab. Paddyfields, Heneratgodha. | 
174. CosmaRIUM REGNESII, Reinsch, in Abhandl. naturhist. Gesellsch. Nürnberg, iii. 1866, 
p. 112, t. 7. fig. 8. 
Var. PRODUCTUM, var. n. (Pl. 20. fig. 35.) Var. angulis superioribus semicellularum 
sursum et extrorsum productis; tumoribus parvis 3 (ut in var. montano) in semi- 
cellula unaquaque ; sinu magno subsemicireulari. 
Long. 15-17 »; lat. 13°5-15°5 p; lat. isthm. 4°3-4°8 u; crass. 8'5 pu. 
Hab. Paddyfields, Heneratgodha. 
