Incrementa florae jamaicensis. 87 
distances. For instance, one may pass from the southern slopes of 
the John Crow Peak of the Blue Mountains at about 5500 ft., where 
xerophytic conditions sometimes occur and often cold nights with 
temperature down to 50° F., round the shoulder to the north and 
straight down 3000 ft. to the Mabess River where there is almost 
constant rain, continual moisture from a perennial stream and a warm 
temperature at nights. 
The geological structure of the Blue Mountains distriet is termed 
by the geologist, Sawkıns, the Metamorphosed Series, and consists 
chiefly of brittle shale, easily decomposing, with occasional masses of 
coral limistone, marble, granite etc. interspersed. 
There is a range of mountains close to the east end, running in 
a northerly and southerly direction, rising to an elevation of 2100 ft. 
The coast in the neighbourhood is rocky, and continues so for some 
distance to the west of Port Antonio. These mountains, known as 
the John Crow Mountains or Blake Mts., are so wet, and the lime- 
stone rock is so difficult to travel over, that it is believed only one 
white man has ever crossed them. Naruanten Wırson may have col- 7 
lected on the slopes of these mountains on the east side, or on the 
southerly slopes, some of the species that have not been found since. 
The limestone rock of these mountains occurs over the greater 
part of Jamaica, and in large distriets it has disintegrated so as to 
form, as in the John Crow Mts., such a series of precipitous cliffs 
that it is impossible to travel through it. The so-called „Cockpit country“ 
is of this nature, and it is in such places that new species of plants 
may naturally be looked for. I sent Mr. Harrıs several times to col- 
lect in this cockpit country from Troy as a base, and the number of 
new species found fully justified my expectations. 
In consequence of the restrieted areas in which so many species 
are found, it is no wonder that several collected by botanists in former 
days — Swarrz, Purpıs, WULLSCHLAEGEL, Wırson etc. — have not 
been met with since. Peltostigma pteleoides has only survived, because 
the wood in which it grows, is near a large school, and was bought 
by the school trustees to prevent it from being let to negro peasants 
wherein to cultivate their yams. 
Ranunculaceae. 
Ranuneulus eubensis Griseb. Cat. (1866) p. 1. 
Anonaceae. 
Anona jamaicensis Sprague (n. sp.) in Bull. Herb. Boiss. II sör. V 
(1905) p. 701 —= A. sericea Griseb. Flor. p.5 (quoad plant. jam., non 
Dun.). | 
