differences are expressed at the bottom of the accompanying plate, 
where fig. 1. represents D. Pierardi, and fig. 2. D. cucullatum. 
Whether or not the latter is really a distinct species may possibly be 
doubted; but it is certainly so remarkable a form, as to have amply 
justified Dr. Brown in separating it from Pierardi. 
Allied to these plants are some new species, which we avail 
ourselves of the present opportunity of making known to Botanists. 
1. D. ochreatum (Lindl. in Wall. Cat. no. 7410) ; caulibus brevibus e squamis 
membranaceis ventricosis erumpentibus, foliis ovato-lanceolatis acutis, vaginis 
ventricosis, floribus geminatis sepalis petalisque majoribus lanceolatis acumi- 
natis, labello rhomboideo-ovato unguiculato cucullato intüs tomentoso. 
Hab. in Chittagong, Wallich (hab. s. sp. e Museo Anglo-Indico). > 
Species vaginis laxis, alioquin facie D. Pierardi, primo intuitu distinguenda. 
Flores expansi feré 3 uncias lati, pallidi. Labellum purpureo-maculatum ; 
ungue intús supra medium calloso. 
A beautiful plant. 
2. D. Cunninghamii ; caulibus gracilibus pendulis ramosis vaginis foliorum cor- 
neis transversim corrugatis squamatis, foliis ovato-linearibus obtusiusculis, 
pedunculis oppositifoliis Bifloris foliis multo brevioribus, sepalis ovatis acutis, 
petalis oblongis acutis latioribus, labelli trilobi lobo intermedio subrotundo 
undulato basi 5-lamellato lateralibus nanis acutis. 
Hab. supra truncos Callistemonis elliptici (4. C.) in insula septentrionali Nove 
Zelandie, juxta mare, incolis Raumangha ; R. Cunningham (hab. s. sp. 
comm. cel. A. Cunningham ). 
This species is nearly allied to D. biflorum, of which I had examined no 
specimens at the time the Gen. et Sp. Orch. was published. Having since 
received that plant in a good state from Mr. Mathews, who found it in Otaheite 
hanging from the branches of trees, 1 am enabled to offer a correct definition of 
that very rare plant. 
D. biflorum Swartz; caule pendulo gracili tereti, foliis lineari-lanceolatis acumi- 
natis planis, pedunculis bifloris lateralibus e paleis corneis erumpentibus, 
sepalis petalisque acuminatissimis, labello rhomboideo medio bilamellato tri- 
lobo lobis lateralibus acutis nanis intermedio deltoideo acuminato margine 
fimbriato, 
3. D. Grifithianum ; caulibus erectis elongatis clavatis sursum tetragonis apice 
diphyllis, foliis lanceolato-oblongis obtusis, racemis laxis flexuosis multifloris 
pendulis e latere caulium natis, bracteis oblongis membranaceis pedicellis 
4-pló brevioribus, petalis oblongis ciliolatis sepalis dupló latioribus, labello 
oyato pubescente denticulato subrepando, capsulis pyriformibus angulatis. 
Hab. in Regno. Burmano supra arbores, W. Griffith. (hab. s. sp. comm. cel. 
Griffith .) 
A beautiful species with much the appearance of D. aggregatum. 
4. D. extinctorium ; pseudobulbis depressis orbiculatis aggregatis, foliis . . . > 
pedunculis terminalibus unifloris, sepalis lateralibus posticis basi longé in 
extinctorii forma productis, labelli ungue longissimo tenui, limbo trilobo : 
lobis “weno erectis acutis intermedio oblongo rotundato, capsula pyriformi 
angulata. 
Hab. in Regno Burmano locis humidis supra truncos Careyz arborem, W. 
Griffith (hab. s. sp. comm. cel. Griffith.) 
This is next D. pusillum Blume, and has very much the appearance of a 
Bolbophyllum. Its leaves have not been seen. 
