Chapter IV—THE FAUNA CONSIDERED BY SYSTEMATIC GROUPS. 
1. PROTOZOA. 
This phylum is represented in our list by 99 determined species, together with 5 
others which are entered as undetermined or doubtful. Of the 99 determined species 
32 are assigned to the Rhizopoda, 2 to the Heliozoa, 21 to the Mastigophora, 38 to the 
Ciliata, 5 to the Suctoria, and 2 to the Sporozoa. All but 2 of the rhizopods belong to 
the subclass Foraminifera, of which 23 species have been encountered during our dredging, 
and a number of others collected on piles, etc. With the exception of two or three 
species, no Foraminifera had been recorded for local waters prior to the operations of 
the present survey. 
The data which we have utilized relative to the Protozoa are derived mainly from 
two sources. The Foraminifera were obtained during the dredging operations of 1905 
and 1907, and were, without exception, identified by Dr. J. A. Cushman, of the museum 
of the Boston Society of Natural History. A nearly complete list of these species has 
already been published by Dr. Cushman (1908). The records for the other divisions 
were taken from the report of Calkins (1902) upon the marine Protozoa of the region, 
to which have been added a very few data from the writings of Peck (1894 and 1896). 
In our annotated list the classification which we have adopted is that of Professor 
Calkins, except in the case of the Foraminifera. For the treatment of the latter group 
Dr. Cushman is responsible. 
The local records for Protozoa are comparatively scanty. The report of Calkins 
represents the search of one investigator for a period of two months during the mid- 
summer alone. With very few exceptions, the forms listed were taken from the local 
pier, close to the laboratory building. Nevertheless, as a result of this somewhat super- 
ficial examination, Calkins was able to record 72 species, 8 of which were described as 
new to science.% 
No search was made for Foraminifera during the summers of 1903 and 1904, though 
Discorbina rosacea was noted on several occasions without its identity being recognized. 
Dr. Cushman’s presence at the Woods Hole laboratory during the season of 1905 directed 
our attention to these organisms, and bottom samples from most of the stations of that 
year were examined by him personally. The dredging during that season was restricted 
to Vineyard Sound (Fish Hawk) and the eastern shore of Buzzards Bay (Phalarope). 
Two years later, in order to obtain more complete records for the Foraminifera and certain 
other organisms, about 25 of the Fish Hawk stations in Vineyard Sound and about 30 
of those in Buzzards Bay were revisited. Bottom samples from all these points were 
submitted to Dr. Cushman, who was thus enabled to provide us with important supple- 
mentary data. Only two species were found, however, which had not previously been 
recorded by us, and it is Dr. Cushman’s belief that the list of local Foraminifera is toler- 
ably complete. But our knowledge of their distribution within the region was greatly 
extended by these later dredgings. We have accordingly departed from the custom, 
which has been followed for most other groups, of including in our distribution charts 
@ Two of these are no longer regarded by Dr. Calkins as good species. 
oI 
