APPENDIX 581 



in size, whilst they run up to 8 or 10 cm. (3-4 inches), and may be 

 less than a centimetre (f inch). 



(b) The affinities of the Fijian and Samoan species. 



P. odoratissimus Wide-ranging Section Keura. 

 P. joskei Fiji ,, Lophostigma. 



P. samoensis Samoa ,, Lophostigma. 



P. thurstonii Fiji ,, Acrostigma. 



P. reineckei Samoa ,, Hombronia. 



NOTE 59 (page 188) 

 SEEDS IN PETRELS 



Darwin, in his correspondence (1859) with Sir Joseph Hooker, refers 

 to the occurrence of large West Indian seeds in the crops of some nestling 

 petrels observed by Sir William Milner at St. Kilda (Life and Letters, II, 

 147, 148). Mr. Charles Dixon in Ibis (1885) refers to Sir W. Milner's 

 observation in the case of the Fulmar Petrel (Procellaria glacialis) and 

 speaks of them as Brazilian seeds brought by the Gulf Stream, adding that 

 he himself found a nut in the crop of one of these birds in the same 

 locality. He supposes that the birds pick them up from the water. 

 Mr. Hemsley very kindly wrote to Sir Joseph Hooker recently on this 

 point with the object of obtaining some idea of the nature of the seeds ; 

 but after this lapse of time it has not been found possible to satisfy 

 my curiosity. I live in the hope of their proving to be Caesalpinia seeds. 



NOTE 60 (page 202) 



SCHIMPER ON THE HALOPHILOUS CHARACTER OF LlTTORAL 

 LEGUMINOS^E AND OF SHORE PLANTS GENERALLY 



As a result of extensive microchemical investigations, this eminent 

 German botanist arrived at the conclusion that plants living on the sea- 

 shore, or in inland stations rich in chlorides, are able, as a rule, to store up 

 in their tissues a large quantity of these salts, a capacity enabling them to 

 live in localities where the subsoil is rich in these materials. This inference, 

 as shown in his experiments, is just as applicable to the shore-plants 

 of temperate regions, such as Aster tripolium, Crambe maritimum, and 

 Eryngium maritimum, as it is to such typical littoral plants of the tropics 

 as Barringtonia speciosa, Ipomea pes caprae, Scaevola Koenigii, Tournefortia 

 argentea, &c. However, with the Leguminosae experimented upon, this 

 capacity of storing up chlorides was often exhibited but slightly or not at 

 all; and characteristic Pacific beach-plants, such as Canavalia turgida, 

 Pongamia glabra, and Sophora tomentosa are especially cited as examples 

 (Schimper's Ind. Mai. Strand-flora, pp. 140-151 ; Wolffs ash-analyses are 

 here quoted). 



