REPORTS 
ON THE 
RESULTS OF DREDGING, 
UNDER THE SUPERVISION OF ALEXANDER AGASSIZ, 
IN THE GULF OF MEXICO (1877-78), IN THE CARIBBEAN SEA (1878-79), AND ALONG 
THE ATLANTIC COAST OF THE UNITED STATES (1880), 
BY THE U. S. COAST SURVEY STEAMER "BLAKE," 
LlEUT.-CoM. C. D. SiGSBEE, U. S. N., AND CojI.MANDER J. R. B.VRTLETT, U. S. N., COMMANDING. 
XXIV. Part I. 
Bepori on the Echini. Bi/ Alexander Agassiz. 
(Published by permission of Carlile P. Patterson and J. E. Hiloard, Superintendents 
U. S. Coast and Geodetic Survey.) 
Cidaris tribuloid.es Bl. 
s. Flanef,'an Passage. 
Lat. 2-1° 44' N., Long. 83° 26' W. 37 fathoms. 
Oflf St. Kitts, 250 fathoms. Flanegan Passage. ? 7 / ^ 
* Dorocidaris Bartletti A. Ag. 
Dorocidaris Bartletti A. Ag. Bull. M. C. Z., VIIL, No. 2, p. 69, 1880. 
Montserrat to Barbados. 88-393 fathoms. 8 - -jy « 
PL II. Fiffs. lG-27. 
At St. Vincent and at Martinique were first collected a number of re- 
markable spiny transversely banded radioles (PI. II. Figs. 18, 19, 26, 27) 
similar to those of Goniocidaris hispinosa, and which I had already noticed in 
the earlier Preliminary Reports of the Blake Expedition for 1877-78. From 
Barbados a few specimens of Cidaris were dredged, showing these radioles 
to belong to a species of Dorocidaris differing from D. papillaia and D. 
* Species marked * were discovered by the " Blake." 
