192 MESSRS. W. WEST AND G. S. WEST ON 
268. ARTHRODESMUS PHIMUS, W. B. Turn. in K. Sv. Vet.-Akad. Handl. xxv. 1893, no. 5, 
p. 136, t. 12. fig. 9. 
Long. (sine spin.) 19°5 u; lat. sine spin. 24-25°5 u, cum spin. 29-314. (Pl. 22. fig. 21.) 
Hab. With the preceding species. 
The forms we observed of this plant were rather more deeply constricted, the sinus 
being somewhat acuminate. They were also relatively a little broader. 
269. ARTHRODESMUS CURVATUS, W. B. Turn. /. c. p. 135, t. 11. fig. 33, t. 12. figs. 2, 8. 
Long. 37 u; lat. sine spin. 37 u, cum spin. 81-83, ; lat. isthm. 11:5 u. 
-Hab. With the preceding species. 
270. ARTHRODESMUS GIBBERULUS, Joshua, in Journ. Linn. Soc. Bot. xxi. 1886, p. 34, 
t. 24. fig. 6. 
Long. 314; lat. sine spin. 28-304, cum spin. 40-48 u; lat. isthm. 8u; crass. 19 y. 
Hab. With the preceding species. 
This species has previously been recorded from Burmah and Central India, and as the 
figures given by Joshua and Turner are very poor, we give an illustration of one of 
the examples we observed from Ceylon (Pl. 22. fig. 22). Neither of these authors has 
mentioned the thickening in the middle of the semicells which is well seen in vertical 
view. "There is also a slight thickening or even sometimes almost a small excavation in 
the middle of the apex of the semicells. 
Wildeman has united this plant and 4. curvatus, W. B. Turn., under one species as 
A. gibberulus, clearly indicating that he has not seen the plants themselves. 
271. ARTHRODESMUS INcUs, Hass, 1845; Ralfs, Brit. Desm. 1848, p. 118, t. 20. 
figs. 4 a-d. 
Var. VALIDUS, West & G. S. West, in Journ. Linn. Soc. xxxiii. 1898, p. 320, t. 17. 
fig. 16. 
Long. sine spin. 33,4, cum spin. 84,4; lat. sine spin. 29,4, cum spin. 50,4; lat. 
isthm. 9 u. 
Hab. With the preceding species. 
Genus ONYCHONEMA, G. C. Wallich. 
272. ONYCHONEMA UNCINATUM, G. C. Wallich, in Ann. & Mag. Nat. Hist. ser. 3, v. 1860, 
p. 195, t. 8. figs. 7-11. 
Var. SUBGLABRUM, var. n. (PI. 22. fig. 31.) Var. granulis intra margines superiores et 
laterales nullis. 
Long. 19-20 p; lat. cum spin. 32:5-34/5 p; lat. isthm. 6-7 p. — 
Hab. Paddyfields, Heneratgodha. 
