MR. C. B. CLABKE ON CAREX WAHLENBERGIANA. 295 
Ord. CRYPTO-RAPHIDIES. 
Fam. MELosIREX. 
#86. MELOSIRA VARIANS, Agardh; W. Sm. Brit. Diat. ii. p. 57, 
t. 51. f. 332. 
Hab. In warm stream, road to Roseau Lake (2500 ft.), 
Dominica. No. 1177. 
Fam. BrpDULPHIEX. 
#87. TERPSINOË musica, Ehrenb., Van Heurck, Diatom. 
(Engl. transl.) p. 452, cum fig. xylogr. 176. 
Hab. In cold and warm streams, road to Roseau Lake 
(2500 ft.), Dominica: very abundant. Nos. 1176 and 1177. 
This species is highly interesting as most of the genera of this 
family are notably marine. 
On Carex Wahlenbergiana, Boott. 
By C. B. CıÄrke, F.R.S., F.L.S. 
[Read 6th April, 1899.] 
1. Carex WAHLENBERGIANA, Boott, Carex, ii. (1860) p. 101, 
t. 301.—Foliorum pagina superior, levis, 19-costata; costi 
valide, leves striis paucis tenuibus interjectis. Panicula 8-6 dm. 
longa, 5-10 em. lata; panicule partiales inferiores oblonge, nec 
pyramidales ; spice densiuscule site, nec congesta, ferrugineo- 
brunes, rarius pallide brunew subviridescentes (var. pallida, 
Boott MS.) Glume unicolores, brunex, striis numerosis ob- 
scuris, glabri in carinä leves (cf. var. 5) vel apicem versus paullo 
scabre. Utrieulus (rostro incluso) 4 mm. longus, ellipsoideo- 
lanceolatus, rectus rarius paullo curvatus, plano-convexus, in 
facie planä 5-7-striatus, convexä 9-ll-striatus, in marginibus 
(sepe usque ad basin fere) minute scaber, glaber (cf. var. 6) in 
rostrum sensim attenuatus, luteo-brunescens, unicolor ; rostrum 
cum 2 parte utrieuli subequilongum, latiusculum, leve, dentibus 
2 majusculis, lanceolatis, paullo seabris subpatulis. Nux ot- 
longo-obovoidea, acute triquetra fere sessilis.— Boeck. in Linnea, 
xl. (1876) p. 357 partim, ?. e, nucis deser. emend. et Boott t. 304 
excl.; Daker! Fl. Maurit. p. 427. 
