OF CATASETUM TRIDENTATUM. 153 
spirits, and in all found they were much less transparent. Again, 
in all three species of Catasetum the ovule-bearing cords are short, 
and the ovules present a considerably different appearance, in 
being thinner, more transparent, and less pulpy than in the nu- 
merous other Orchids examined for comparison. They were, how- 
ever, in not so completely an atrophied condition as in the genus 
Acropera. Although they correspond so closely in general appear- 
ance and position with true ovules, perhaps I have no strict right 
so to designate them, as I was unable in any case to make out the 
opening of the testa and the included nucleus; nor were the 
ovules ever inverted. From these several facts—namely, the short- 
ness, thinness, and smoothness of the ovarium, the shortness of the 
ovule-bearing cords, the state of the ovules themselves, the stig- 
matic surface not being viscid, the empty condition of the utriculi 
—and from Sir R. Schomburgk never having seen C. tridentatum 
producing seed in its native home, we may confidently look at this 
species of Catasetum, as well as the other two species,as male plants. 
Fig. 2. 
i 
MYANTHUS BARBATUS. MONACHANTHUS VIRIDIS. 
a. anther. p. pollen-mass, rudimentary. 
an, antenne. s. stigmatic cleft. 
l. labellum. sep. two lower sepals. 
À. Side view of Monachanthus viridis in its natural position. 
(The shading in both drawings has been added from M. Reiss's drawing 
in the * Linnean Transactions.") 
B. Side view of Myanthus barbatus in its natural position. 
M2 
