MAY 31 190 
No. 6.— TYPES IN THE PALEONTOLOGICAL COLLEC¬ 
TIONS OF THE BOSTON SOCIETY OF 
NATURAL HISTORY. 
LIBRARY 
BY JOSEPH A. CUSHMAN. 
BOTANICAL 
This catalogue is a list of the type fossils in the collections of the 
Boston society of natural history. The collections in the Museum 
are divided into two sections, American and European. The list is 
arranged so as to be as convenient as possible for a systematist in 
search of type material. The various groups are here separated 
and under these the species are arranged alphabetically. The data 
in regard to the species are given in the following order: (1) cata¬ 
logue number, (2) name of species as it appears in the place given in 
the reference, (3) kind of type, (4) formation, (5) locality, (6) author 
and place of publication, and (7) a cross reference where there is more 
than one entry or the present accepted name of the species where it is 
different from the name under which the specimens appear in the 
catalogue. This latter reference has been given only in the case of 
the American species. A full list of the references to certain speci¬ 
mens has not been attempted but simply the more important ones are 
given. 
The type specimens listed in this catalogue are divided into four 
groups, as follows: — 
jH olotype — either a particular specimen selected by the author 
from a series or the only specimen known to the author at the time of 
his publication of the species. 
Paratype — any specimen of the original series left after the holo¬ 
type has been selected. 
Cotype — any specimen of the original series where no holotype 
was selected by the author. 
Plesiotype — any specimen used in subsequent description or 
illustration of the species but not used in the original description of 
the species. This is here used to include specimens referred to by 
number as in the collection. 
In cases where the specimen is represented by counterparts, the 
figured half is known as the obverse, its counterpart as the reverse. 
