r i; r o rts 



Ri; S D LT S () F I) R E I) (J TNG, 



UNDER llli: SUPER\ ISION OF \l.l \ Win. I; A.G \-MX, 



IX THE GULF OF MEXICO (1877 78), IN THE CARIBBEAN SEA (1878-79), AND ALONG 

 THE ATLANTIC COAST OF Till; UNITED STATE 



BY Till: D. S. COAST SURVEY STEAMER "BLAKE," 



Lieut.-Com. C. I» Sigsbee, I". s. X., am. Commander .1. R B muni;. 



XXIV. Part 1. 

 Report on the Echini, By Ai i :s \\iu:i: Agassiz. 



(Published by permission of Carlile F I E. Hili h.d, Superintendents 



U. S. Coast and Q letie Sun 



Cidaris tribuloides I3l. 



Off St. Kitts, 250 fathom- Flani 



Lai 24° II \ . Lor \ S3 26 W. 37 fathoms. 



1 Dorocidaris Bartletti A. A., 



Dorocidaris Bartletti A. A... Bull. M. i' '/.., VIII., Xo. -', p. (ill, l^o 

 M n I ms. 



/'/. //. /■•;,/,. t6~27. 



At St. Vincenl and ;it Martinique were firs! collected ;i number of re- 

 markable spiny transversely banded radioles (PI. II. Figs. I s . 19, '-'li. 27) 

 similar to those of Goniocidaris bispinosa, and which 1 had already noticed in 

 the earlier Preliminary Reports of the Blake Expedition for l s 77 78. From 

 Barbados a few specimens of Cidaris were dredged, showing these radioles 

 to belong to ;i Bpecies of Dorocidaris differing from I>. papiUata and l> 



* Species marked • were discovered bj tli 



