WILLIAM WALES, Fort Lee, N. J. 
MANUFACTURER OF 
FIRST-CLASS MICROSCOPE OBJECTIVES. 
MICROSCOPES FURNISHED OF ALL MAKES—ZENTMAYER’S AI- 
WAYS ON HAND. INSTRUMENTS ORDERED IN NEW 
YORK CITY SENT ON APPROVAL. 
DISCOUNT TO COLLEGES. 
-CHARACE& OF AMERICA. 
The first fascicle of the Second Part of the Characez of America is 
now ready. It contains descriptions of eight species of JVite//a, as fol- 
lows: Witella opaca, Ag.; obtusa, Allen; montana, Allen; Blankin- 
shipit, Allen; Missouriensis, Allen; flexilis, Ag.; subglomerata, A. Br. ; 
glomerulifera, A. Br., with fourteen full-page illustrations (eight litho- 
graphic plates and six photogravures). ‘These fascicles will be issued 
from time to time as plates can be prepared ; price of each part $1, the 
actual cost, if the whole edition of 500 copies be sold. Address 
Tree. ALULEWN, 
10 East 36th St., N. Y- 
MEMOIRS 
+ FROM THE ... 
Department of Botany of Columbia College. 
VOLUME 1. 
A Monograph of the North American Species of the Genus 
Polygonum. Quarto, pp. 178, 85 plates. Price, $6.00. 
For copies address, 
PROF. N. L. BRITTON, 
Herbarium Specimens for Sale. 
Two hundred species collected during the past winter and determined in accord- 
ance with Jenman’s “Ferns of Jamaica” as far as that is published. Numbered and 
labeled. The list comprises 34 genera, and includes about a dozen tree ferns, two 
dozen filmy ferns, a large number of choice Polypods and Asplenia, together with 
many rare and desirable species in other genera. The specimens are fresh, green and 
well preserved. Address 
B. D. GILBERT, 
Clayville, N. Y- 
