150 ALEXANDER W. EVASN 



probably referred to by Spruce when he speaks of "rami decurvi apice 

 subaphyllo." They agree in all essential respects with those of P. 

 heterophyllus. 



Two species of Brachiolejeunea are known from Florida at the 

 present time, B. corticalis (Lehm. & Lindenb.) Schiffn.^^ and B. 

 bahamensis Evans. ^^ Both usually bear perianths in abundance with 

 the subfloral innovations characteristic of the genus. They are both 

 somewhat darker than the new Ptychocoleus, and are slightly more 

 robust, their leaf-lobes measuring about 0.9 mm. in length. Further 

 difTerences in the marginal teeth of the lobules may be noted. There 

 are usually four of these teeth in B. corticalis and five in B. bahamensis, 

 the teeth being only slightly inflexed, so that it is possible to flatten 

 them out. In B. corticalis the teeth are relatively simple, but in 

 B. bahamensis they are usually three or four cells in length and show 

 considerable irregularity. 



Sheffield Scientific School, 

 Yale University 



" See Evans. Mem. Torrey Club 8: 131. pi. 18, f. i-ii. 1902. 

 12 Evans. Bull. Torrey Club 35: 383. pi. 28, f. 1-4. 1908. 



