ramoso instructum. Colwmna leviter incurvata, 1.5-1.75 
mm. longa, semiteres; anthera semiellipsoidea, 0.5-0.6 
mm. longa; rostellum ligulatum, anguste truncatum. 
Betaian Coneo: Katanga Province, Kinsenga River, near Elisa- 
bethville, in wet dark places at river’s edge under trees, only found 
in this locality, Nov. 80th 1923, C. W. von Hirschberg 111 (Tyre; 
Isorypr in Herb. Brussels). 
This is clearly an ally of M. Maclaudu (Finet) Sum- 
merh. and M. Chevalieri Summerh., both of which are 
found in the general region stretching from French 
Guinea to the Sudan along the north side of the Equa- 
torial Forest belt. These are all characterised by the very 
short apparently umbellate raceme, the relatively broad 
fan-shaped lip and the tepals all more or less similar to 
one another. The present species may be distinguished 
most readily by the great development of the thickened 
margin of the lower part of the lip which in this species 
extends for half the total length; above this thickened 
margin the lip suddenly widens to form a thin trans- 
versely elliptical portion which is shortly lacerate all 
round. In M. Maclaudi the basal thickened portion is 
very poorly developed, while M. Chevalier lacks the 
central projecting tooth-like callus. 
Liparis odontochilos Swmmerhayes sp. nov. afh- 
nis L. Deistelii Schltr., sed labello medio subito dilatato 
marginibus lateralibus grosse dentatis differt. 
Herba terrestris vel epiphytica, usque ad 13 cm. alta. 
Caulis primarius repens, gracilis, teres, 1-2 mm. diame- 
tro, cataphyllis arcte vaginantibus obtusis + obtectus, 
radices flexuosas hie illic emittens; caulis secundarius 
erectus, basi valde incrassatus, carnosus, pseudobulbum 
anguste conicum formans, sursum sensim angustatus, 
inferne cataphyllis subfoliaceis acutis vestitus, superne 
3-4-foliatus, usque ad 5 cm. altus. Folia lanceolata vel 
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