

Evans: New West Indian Lejeuneae 383 



cells in P. affixa are exceedingly delicate, and the trigones are 

 difficult to demonstrate. 



Vegetative reproduction in 0. longispica is carried on by means 

 of leafy propagula, which are very similar to those already noted 

 in 0. lunulata and 0. Sieberiana* All that were seen still at- 

 tached were situated behind perigonial bracts, but it is hardly to 

 be supposed that they are restricted to this position. The under- 

 leaves of the propagula are almost exactly the same as in 0. lunu- 

 lata, the second one showing a large radicelliferous disc with two 

 layers of coalesced rhizoids, precisely as in that species. The 

 leaves, however, exhibit a number of differences and are modified 

 to an even greater degree. The first leaf is more or less reflexed 

 and is abruptly contracted at the apex into a long point. The 

 other marginal teeth are numerous but very minute, each one 

 usually consisting of a single projecting cell. The second, third, 

 and fourth leaves are also sharp-pointed at the apex, but the other 

 teeth tend to become more scattered and larger, so that by the 

 «me the fifth leaf is reached, the distinction in size between the 

 apical and marginal teeth is scarcely apparent. The lobules of the 

 rst four or five leaves are represented by minute basal folds, and 

 the apex consists of a single projecting cell, which bears the hy- 

 a "ie papilla on its inner surface. Occasionally one of these rudi- 

 mentary lobules will show vague indications of a second tooth 



n tne apex and base, thus indicating perhaps an approach 

 ° ° ther me mbers of the genus. A tendency to branch is some- 

 mes sh °wn very soon by the propagula, and in one observed 

 stance a male s pike arose directly behind the second leaf. 



Brachiolejeunea bahamensis sp. nov. 



growin green ' vat Ting to brown or almost black, scattered or 

 'ndv ^r^ de P ressed mat s : stems o. 14 mm. in diameter, spar- 

 4>L f ,1TegUlarly P innate > the branches all conforming to the 

 0r with* oblia . uel y to widely spreading, similar to the stem 



in »bricat ! 0n J ewnat sma Uer leaves, never microphyllous : leaves 

 dr y, wid I lobe SUDerect and convolute about the stem when 



.!•.! . e y spreading and more or less squarrose when moist, 



mm. long, 0.5 mm. 

 margin strongly out- 



sl 'ghtl v f l 4CdUin g and more or less s 

 wide L , Ca ! e ' convex, oblong-ovate, 0.9 

 ^-[ounded to subcordate at base, antical 



BU1L Torre y Club 31 : , 9I . I904 . 



