Prof. Lindley on new Orchidaceous Plants. 383 



continuation of the stem could be seen, probably a part of the 

 root. 



H.M. Ship Erebus, Woolwich. 



EXPLANATION OF PLATE XX. 



Fig. 1. Serpentaria fragilis reduced to one-half its natural size. 



Fig, 2. Abdominal surface of the anterior part of the body, showing the 



cloaca. 

 Fig. 3. Nemertes gracilis, reduced to one-half nat. size. 

 Fig. 4. Forbesia formosa, natural size. 

 Fig. 5. Pedicellina echinaia, nat. size, and magnified after Sars. 



LIV. — A Century of new Genera and Species of Orchidaceous 

 Plants. Characterized by Professor Lindley. 



[Continued from p. 257.] 



Decades 5 and 6. 



41. Lycaste barbifrons ; foliis oblongis in petiolum longum angus- 

 tatis plicatis, bractea suprema angusta ovario paulo longiore, se- 

 palis petalisque subconformibus lanceolatis falcatis lateralibus in 

 mentum longum productis, labello oblongo basi concave 5-lineato 

 appendice lata emarginata adnata ; lamina oblonga plana basi fim- 

 briata apice rotundata laciniis lateralibus rotundatis, columna an- 

 tice villosissima auriculis apice falcatis. 



Peru (Hartweg). 



Very near L. lanipes, but twice as large, and with long-stalked 

 leaves. It is also different in the form of the lip and in the shaggy 

 column. 



42. Maxillaria lepidota ; acaulis, foliis solitariis ligulatis acutissimis 

 in petiolum angustatis, pedunculis unifloris acute vaginatis erectis 

 dimidium folii sequantibus, sepalis elongatis linearibus acurainatis, 

 petalis setaceo-acuminatis duplo brevioribus, labello carnoso ob- 

 ovato trilobo apice carinato et utrinque lepidoto lacinia intermedia 

 ovata lateraliumque margine anteriore crenatis, tuberculo angusto 

 vix medium labelli attingente. 



Popayan (Hartweg). 



43. Maxillaria p-ocMrrew5; caulescens, pseudobulbis obovatis com- 

 pressis diphyllis, foliis ligulatis subsessilibus, pedunculis solitariis 

 squamoso-imbricatis pseudobulbis longioribus, sepalis petalisque 

 ovatis acutis, labello oblongo obtuso indiviso juxta basin callo ob- 

 longo aucto. 



Popayan (Hartweg). 



Very like M. platypetala. 



44. OsciBivupentadactylon; pseudobulbis ovatis compressis diphyllis, 

 foliis lanceolatis tenuibus scapo longissimo paniculato multo bre- 



