20 MR. G. D. HAVILAND: REVISION OF THE NAUCLEES. 
in Malpina. Neither of the two species which extend from 
Asia into the Malay Peninsula reach Borneo, though they both 
reach Java. . 
Notwithstanding that the genus Uncaria is so widely dis- 
tributed, nearly half of its species grow in Borneo ; yet whilst 
Nauclea is a peculiarly Malayan genus nearly a fifth only of 
its species grow in Borneo. The reason seems to be that the 
headquarters of the genus Uncaria are in Western Malasia, 
whilst the headquarters of the genus Nauclea are in Eastern 
Malasia. 
A group of plants so well represented in the Malayan Archi- 
pelago might be expected to give evidence as to the value of 
isolation in the formation and limitation of specific differences ; 
but so far as Western Malasia is concerned specific limits seem 
to take almost no account of the seas which separate Borneo, 
Sumatra, and Malpina. In Eastern Malasia it is probable that 
specific limits will be found to agree better with the position 
of the sea, but the islands there have been isolated for a much 
longer time. 
BIBLIOGRAPHY. 
On Fertilization. 
Burcx, M.W.—In ‘Annales du Jardin de Buitenzorg,’ iv. p. 46. 
Meenan, Tu.—In Proc. Acad. Nat. Sc. Philad. 1890, pp. 266- 
277 ; ibid. 1887, p. 325. 
Rozertson, Cu.—In Bot. Gazette, xvi. 1891, pp. 65-71. 
On Medicinal Uses of Sarcocephalus esculentus. 
Wrrtixe.—In Pharm. Zeitung, 1886, No. 51, p. 391. 
HECKEL and ScHLAGENHAUFFEN.—In Journ. de Pharm. xi. 
pp. 409, 463. 
Tribe NAUCLEEJE. 
Flores numerosi, in receptaculum sphericum densissime com- 
pacti, sessiles vel pedicellati, bracteolati vel ebracteolati. Calycis 
tubi pars inferior ovario adherens, superior ab ovario libera, 
truncata vel lobata ; lobi varii, sepissime quinque, raro quatuor, 
valvati vel imbricati, caduci vel persistentes. Corolla anguste 
infundibularis; tubus elongatus; lobi breves imbricati vel val- 
vati. Stamina ore vel fauce corolle inserta; filamenta brevia. 
