12 
Herbarium of slides. Catalogue entries and paleographs for each number 
is noted also in the list. Clarifying information has been added to the 
description of some slides; information which is bracketed is speculative 
or specifically not derived the source materials described above. 
B) A DIATOM EXSICCATI COLLECTION 
The algal•herbarium which the Boston Society of Natural History 
donated to the Farlow Herbarium in 19^1 contained 303 sheets of diatom 
exsiccati that I have determined to have come from Bailey and to represent 
materials described in the second part of the 1857 bequest. Most of 
these sheets bear specific notations in Bailey’s handwriting. I have 
attributed other sheets to his bequest because they represent specimens 
from collectors, such as Brebisson, Lenormand, Dickie and Ralfs, with 
whom Bailey exchanged materials extensively and because I have found no 
evidence that they entered the Society’s collection by a means other 
than Bailey. The 303 sheets from Bailey’s herbarium were part of a 
slightly larger collection of diatom exsiccati donated by the Society; 
upon receipt of these materials by the Farlow Herbarium, all sheets in 
the collection were pinned or glued to larger herbarium sheets and thus 
their arrangement was largely fixed. I have numbered all the exissicati 
in this collection and prefixed each number with an "E f! , e^.g. E131; 
each number has been placed on a round, 0.8 cm diameter, white label on 
the sheet. The numerical series describing the exsiccati approximates 
an alphabetical arrangement of the taxa. Numbers not listed in this series 
in the index correspond to non-Bailey diatom exsiccati. The authors of 
taxa names presented in the list are those given on the original exsiccati 
labels. 
C) A COLLECTION OF UNMOUNTED MATERIALS comprising bottles of original 
material and slides derived from them. 
