THE BAHAMA ISLANDS 323 



them may be mentioned Myrica cerifera L., Baccharis angustifolia Michx., 

 and Sagittaria lancifoUa L. Plate XXXVII, Fig. 1, is a view of a fine Inodes 

 palmetto (Walt.) Cook (Thatch palm) standing in one of these fresh marshes 

 on the north side. 



EOCKY-SHORE FORMATION.— The north shore of New Providence differs 

 from the south shore in the occurrence of exposed rocks at many places. These 

 rocks are at some points precipitate; at others they form a gentle slope, and 

 in such places are apt to be covered for some distance with a coating of sand 

 next to the sea. In such sandy situations the vegetation is very similar to 

 that of the south beach; but where the rocks are exposed there is an abrupt 

 change. In many places the exposed rocks are covered with a dense growth 

 of Rhacicallis maritima' (Jacq.) Schum, and Suriana maritima L. in pure 

 association, the sand-strand plants being entirely absent. Behind the Rhaci- 

 callis and Suriana is Coccolobis uvifera (h.) Jacq. and the attractive white- 

 flowered Genipa clusicefolia (Jacq.) Griseb. Following these and extending 

 slightly into them are found the ram's horn, darling plum, blolly, jack-bush, 

 wild lime and other littoral coppice plants. At places Hymenocallis areiiicola 

 Northrop forms attractive clumps of bloom. 



MANGROVE CAY, ANDROS. 



Here for the first time we met with a forest in the Bahama Islands. Pass- 

 ing over a range of hills and down a long slope, we came to a low, irregular 

 country where the growth gradually became higher until it finally passed 

 into what might be called a forest, where the Lysiloma paucifolia (DC.) 

 A. S. Hitch. (Horseflesh), Lysidoma latisiliqua (L.) Benth. (Wild tamarind), 

 Fagara coriacea (A. Eich.) Kr. & Urb. (Doctor's club), and Hypelate tri- 

 foliata Sw. (Eed-wood) reached a height of 40 to 50 feet with a diameter of 

 2 feet or more. Next to these in size, with a height of 30 to -10 feet, were 

 Coccolobis laurifolia Jacq. (Pigeon plum), Metopium metopium (L.) Small 

 (Poison-wood), Iclithyomethia piscipula (L.) Hitch. (Dogwood), and Swie- 

 tenia mahogani L. (Mahogany). The growth was thick and the shade dense. 

 The floor of rock was deeply excavated and very irregular, and in crevices and 

 depressions were deposits of black-loam, where fleshy fungi were rather abun- 

 dant. On rotting wood we collected in a few minutes all of the Myxomycetes 

 listed in this report, and there is no doubt that a tliorongh search would dis- 

 cover a large number of this group on Andros. 



On the shoreward side of the hills just mentioned, wliere an uneven plain 



