396 SCIENCE PROGRESS. 



Sierra Leone ; and the material of the N ephrodiiim was 

 hardly sufficient to base a new species upon. Mr. Watson 

 expresses regret that the opportunities of the expedition for 

 exploring the island were not greater, "because they might 

 have considerably increased the number of indigenous 

 species known " ; but, of course, this is most improbable, as 

 the island has been as thoroughly explored as any island in 

 the world. 



Concerning the very small remnant of the original vege- 

 tation of St. Helena, no further information has been recorded 

 during the last decade. It may be mentioned, however, that 

 Penhallow's "Flora of St. Helen's Island" has, by some 

 oversight, been confused with St. Helena in the Atlantic 



(44)- 



BIBLIOGRAPHY. 



(i) E. R. Trautvetter. Plantas quasdam in Insulis Praefec- 

 toriis nuper lectas. Acta Horti Petropolitani, ix., pp. 471- 

 484, 1886. 



(2) F. R. KjELLMAN. Uber die Phanerogamen Flora der Kom- 



mandirski Inseln. Botanisches Centralblatt, xxvi., p. 31, 

 1886. Also more fully in Vega Exped. Vetenskapliga Jakt- 

 tagelser, iv., pp. 283-309. 



(3) F. H. Kittlitz. Views of the Vegetation of the Coasts and 



Islands of the Pacific, p. 64, pi. xxii. 



(4) F. R. KjELLMAN. Fanerogamfloran pa St. Lawrence-on. 



Vega Exped. Vetenskapliga Jakttagelser, ii., pp. 1-23. 



(5) Op. cit., pp. 25-60. 



(6) J. ScHMALHAUSEN. Tertiare Pflanzen der Insel Neusibirien. 



Memoires de V Academie Imperiale des Sciences de St. Peters- 

 bourg, 7 me serie, xxxvii., pp. 24, with 2 plates, 1890. 



(7) Th. HOLM. Novaia Zemlia's Vegetation, saerligt dens Phan- 



erogamer. Dijmphna-Togtets Zool.-Bot. Udbytte, with a 

 French summary, pp. no, with 12 plates, 1885. 



(8) A. G. Nathorst. Nya Bidrag till Kannedomen om Spets- 



bergens Karlvaxter, och dess Vaxtgeografiska Forhallanden. 

 Kong/. Svenska Vetenskaps-Akademiens Handlingar, bd. 

 xx., No. 6, pp. 88, med 2 Kartor, 1883. 



(9) A. G. NATHORST. Studien uber die Flora Spitzbergens. 



Engler's Jahrbiccher, iv., pp. 432-448, 1883 ; and v., Litera- 

 turber., pp. 42-44, 1884. 



