NOTES ON THE FORMS OF CASTELA GALAPAGEIA 283 
oblanceolate acute mucronate, figure 56'; and elliptical mucronate, 
figure The margins of many of the leaves are revolute. 
The leaves on the armed specimen from Narborough Island, taken 
as a whole, are rather oblong in shape, but with few exceptions they 
are acute at the apices. The leaves shown in figure 6 are rather 
typical of this specimen, a being oblong acute mucronate, h oblong 
Fig. 6 
elliptical, similar in size and shape, by the way, to a leaf of the type 
specimen of this form, and c is spatulate. 
Strange to say, none of the Academy specimens have the small 
lateral teeth on the leaves which Robinson^ mentions as being some- 
times present. They are quite evident on the specimen collected by 
Snodgrass and Heller at Tagus Cove, figure if, but do not occur on 
the specimen collected by Baur at the southern end of Albemarle 
Island, evidently in the vicinity of Villamil. 
Forma btndloensis Robinson 
This form is described as being unarmed, leaves entire obovate 
rounded or mucronulate, 1-1.6 cm. long; not shiny above. The 
Academy specimen from Bindloe Island does not agree with this 
description in several ways, as the stem is armed with rather thick 
short spines, and the leaves vary quite as much in shape as on the 
specimens assigned to the form albemarlensis which has just been 
considered. Leaves similar in shape to the one shown in figure 7a 
occur on the specimen, which are evidently like those described by 
Robinson except that the apices are slightly retruse. There are leaves 
which have other shapes, however, such as elliptical, figure yh: spatu- 
late both acute and obtuse, figure jc and d\ and oblong obtuse mucro- 
5 L. c. p. 158. 
