118 



The reference to Acalypha seems safe ; but there is a possi- 

 bility that the plant may be a Croton of the type of C. tiglimn L. 

 In Croton tigliinn the shape, margin, and venation are all different 

 from those of the fossil, and I do not know of any Croton which 

 matches it better. 



Croto7i furcatulum Ckll. 

 A, B, calyces (enlarged). 



Acalypha myricina Ckll. 



Hab. — Miocene shales at Florissant, Colorado, Station 13 B 

 [W. P. Cockerell, 1908). It occurs on a slab with a beautiful 

 branch (bearing thirteen leaves) of Myrica drynieja (Lx.) Kn. 

 The Acalypha leaf is superficially like that of some species of 

 Myrica. 



Croton (?) furcatulum sp. nov. 



Represented by a slender twig, 1 5 mm. long, giving rise to 

 three slender branchlets as shown in the figure, these about 1 1 

 mm. long. The central branchlet supports small dark sessile 

 objects, which appear to be buds or calyces, at 4.5 and 8 mm. 

 from the base, and terminates in a small calyx, below which 

 arises a long-oval or elHptical leaf (no doubt originally a pair), on 

 a petiole about 3 mm. long ; at the base of this leaf is a dark 

 object which may be another calyx. The lateral branchlets fork 

 at a distance of 6 mm. from their origin, giving rise to a pair of 

 branchlets supporting calyces and leaves as shown in the figure. 

 The calyces have long pointed lobes, apparently three in number. 



