220 



Tn Sumatra the L\ang-na-Mii\vap in the department of Padang 

 Lawas, residency of Tapanuli, is especially known, the bottom of 

 which is covered by a bed of guano of a thickness of 2 feet '). The 

 grotto in the isle of Kluwang (5°8' S. Lat., 95"17' E. Long.), near 

 the west coast of Atjeh, contains likewise rather much guano '). 



Numerous are the cavities in limestone in Java, that contain 

 guano. Similar deposits are nowhere missing where swallows or 

 bats are nestling. Some of them were carefully examined, but not 

 a single one is of any significance '). 



Nothing has ever become known of an investigation whether in 

 any of the above-mentioned grottoes phosphatisation has taken place 

 i. e. whether tlie existing guano has caused a metamorphosis of the 

 limestone into phosphorite. 



Botany. — "'On the germination of the seeds of some Javanese 

 Loranthaceae." By Dr. W. and Mrs. J. Doctkrs van Leeuwen- 

 Reijnvaan. (Communicated by Prof. F. A. F. C. Went). 



tCommunicated in the meeting of April 23, 1915). 



1 . Introduction. 



Only a few investigations have been published on the Javanese 

 Loranthaceae. The last caVried out by Koernicke ') appeared in 

 the Aiinales du Jardin botanique de Buitenzorg some years ago. It 

 deals chietly with the adidt life of these plants. Already long before 

 this ariicle appeared we hid occasionally been occupied with experi- 

 iKMii^ Oil ihe geiHU uaiiHii of various ^^L'v\ea oï Lumnthns. Mr. KoER- 

 NicKK wroie lo u^ (lu 1911) that he had also taken with him material 



1) R. C. VAN DER BoR He Lijang na Moevvap en de legende daarf^an verbon- 

 den. Tijdschr. voor Ind. Taal-, Land- en Volkenk. 37, l^atavia 1894, p. 201. 



-I L. H. VVallon, Klouwang et ses Groltes. Cotes ouest d'Atchin. Ann. de 

 l'Extrême i >rienl 2. Paris 1S79— 80, p. 41. — X. Brau de SauntPul-Lias. La 

 Cote de Foivre. Voyage a Sumatra. Paris 1891, p. 224. — Zeeraansgids voor 

 den Oost-lndischen Archipel 1, 2e druk. 's Gravenhage 1904, p. 450. 



S) D. VV. RosT VAN ToNNiNGEN. Schcikuudig onderzoek van eene meststof (guano) 

 afkomstia; uil de afdeeling Grissee. Natuurk. Tijdsch. Ned. Indie 9. Batavia 1855, 

 pp. I Ö7 168. — P. F. H. Fromberg. Verslag over den aard en de bruikbaarheid 

 dt-r diHilijke meststof aanwezig in de grot Poeljakwang te Grissee. Ibid. pp. 169— 

 19' I. J. C. Bernelot Moens. Guano van Telok Djambi, residentie Kraw.ing. 

 Ibid. :i5. 1863, p. 827—328. 



+1 M. KiiERNicKi;, Biologische Studiën an Loranthaceae. Ann. d. Jard. Bot. de 

 Buitenzorg, 3e Supplément, p. 665. 1910. 



