312 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Pulle, A. 
'06. An enumeration of the vascular plants known from Surinam, 
together with their distribution and synonymy. E. J. Brill: Leiden, 
1906, pp. 555, 17 pis., map. 
Schomburgk, R. 
'47-'48. Reisen in Britisch-Guiana in den Jahren 1840-44. Leipzig: 
J. J. Weber, 1847-48, 3 vols, illustr., map. 
Urban, I. 
'03. Flora portoricensis, in Symbolae Antillanae, vol. 4, p. 1-352. Fra- 
tres Borntraeger: Lipsiae, 1903. 
Only through Euphorbiaceae. 
Printed June, 1909. 
