a four-toothed margin for the insertion of the anther. The 

 Stigma occupies a triangular depression on the upper and 

 anterior part of the column, immediately below the inser- 

 tion of the anther. Below the stigma the Column becomes 

 somewhat tumid anteriorly, and has a small channel lead- 

 ing down to a short tube formed by the junction of this 

 part of the column with the middle lobe of the labellum. 

 The lateral lobes are attached to the sides of the column ; 

 so that, except a small portion posteriorly, opposite the 

 superior segment of the perianth, the column is completely 

 embraced by the labellum. The tube formed by the base 

 of the column does not lead to the germen, and its throat is 

 nearly closed by the colli of the middle lobe. The column 

 is yellow anteriorly with rose-coloured wings. The anther 

 is opercular, deciduous, heart-shaped, eight-celled, (one 

 for each mass of pollen, linear, oblong, parallel, and one 

 for each of the spherical bodies which terminate the caudi- 

 culaB or filamentous appendages of the masses,) divided by 

 their membranaceous septa,) of a purple colour. Pollen- 

 Masses four, pyriform, compressed, parallel, yellow, each 

 having a separate caudicula, reflected upon itself, and 

 terminated by a small yellow, viscid, spherical, or glandu- 

 lar body. 



I am indebted to Dr. Nicholson of Antigua for the drawing 

 and description of the present interesting Orchideous plant, which 

 has, I beJieve, been hitherto nowhere noticed, except in the 

 work above quoted, and which appears to be exclusively an in- 

 habitant of the Island of Antigua. It there grows, neither in 

 soil, nor upon trees, but, as Dr. Hamilton, its original dis- 

 coverer, observes, upon stones : and according to Dr. Nichol- 

 son, " upon lofty rocks of the trap formation, along with 

 Epidendrum ciliare, Oncidium pulchellum, Pitcairnia bro- 

 melicefolia, Pilea muscosa, Peperomije, and many species of 

 Ferns. The same gentleman well observes, that it cannot pro- 

 perly be arranged with the Cyrtopodia, as will also appear by 

 his own accurate analyses: and if these be compared with the 

 flowers of Brass avola, I think it will be evident that the plant 

 belongs to the same Genus. The structure of the foliage, too, is 

 alike in both. Our plant differs from Mr. Brown's character 

 of Brassavola in its deeply three-lobed lip ; but in B. tubercu- 

 loid and B. cucullata, the only hitherto known species of the 

 Genus, the two sides at the base are somewhat dilated, or imper- 

 fectly lobed, and, in all, the base of the lip almost surrounds the 

 lower part of the column. 



Tig 1 Flower. 2. Flower, from which the Column is removed. 3. Front 

 view of the Column. 4. Anther with its Pollen-Masses. 5. Anther-Case. 

 b. * our of the Pollen-Masses, with their Caudicula;. 7. Section of a nearly 

 mature Capsule :— more or less magnified. 



