III. — A List of the Brazilian’ Echinoderms, with Notes on* 
their Distribution*, etc. By Richard Rathbun*. 
The following list comprises all the species of Echinoderms col- 
lected or observed on the Brazilian Coast, by Mr. John C. Branner, 
the author, and other members of the Geological Commission of 
Brazil, during the years 1875-77 ; together with the species hitherto 
recorded from that region, in the principal works treating of this 
class of animals. 
In accordance with the instructions of tbe late Prof. Ch. Fred. 
Hartt, as chief of the Brazilian Survey, collections of marine animals 
were made at all the sea-coast localities visited by the assistants of 
the survey, in the course of their geological explorations. The inten- 
tion was to procure material from as many points as possible, to 
serve for the study of the geographical distribution of the several 
species. But the limited time available for zoological work usually 
rendered it impossible to collect other than the larger and commoner 
species, the majority of which, at least in the class of Echinoderms, 
had already been noticed by other travelers, as occurring on the 
Brazilian coast. Comparatively few additions were therefore made 
to the previously known Echinoderm-fauna of Brazil, only a single 
species, a Teptasterias , being with certainty new to science. One 
important result of these researches, however, was the more careful 
determination of the range and exact habitats of many of the spe- 
cies, and this, together with the fact that no complete list of the 
Brazilian Echinoderms has yet been published, has been deemed a 
sufficient reason for the preparation of the present list. 
Except in a few instances, lists of synonymy have been omitted ; 
the authority is always given for the occurrence of the species at the 
localities recorded — in the cases of the Geological Commission and 
the Hartt Expeditions it is the name of the collector, otherwise 
generally the publisher. Mr. Alex. Agassiz’s “ Revision of the 
Echini” is taken as the sole authority for all the localities given in 
the list of that group, excepting where the species were also collected 
on the private expeditions of Prof. Hartt, or by the Geological Com- 
mission. The other authorities used throughout the paper will be 
understood by reference to the list of bibliography which precedes 
Trans. Conn. Acad., Vol. V. 18 June, 1879. 
