No. 1.— Reports on the Results of Dredging, under the Super- 
vision of ALEXANDER AGASSIZ, tn the Gulf of Mexico (1877- 
78), wn the Caribbean Sea (1879-80), and along the Eastern 
Coast of the United States during the Summer of 1880, by the 
U. S. Coast Survey Steamer “ Blake,’ LrEUT.-COMMANDER C. D. 
SIGSBEE, U. S. N., and CoMMANDER J. R. Bart ett, U.S. N., 
Commanding. 
(Published by Permission of Cariite P. Parrerson and J. E. Hitcarp, 
Superintendents of the U. S. Coast and Geodetic Survey.) 
XXX. 
Report on the Holothurioidea, by HistMar THEEL. With one Plate. 
Tue following list not only enumerates the deep-sea Holothurians 
which were dredged during the Blake expeditions, but contains also 
several other shallow-water forms brought home from different localities 
of America, principally by the Hassler Expedition, and now in the 
Museum of Comparative Zodlogy of Cambridge. Referring to my 
report on the Challenger Holothurioidea, to which this list properly 
may be considered as an Appendix, I have nothing of importance to add 
with regard to general conclusions. 
Deima Blakei, n. sp. 
Figures 1, 2. 
Three of the specimens present the greatest similarity with Deima validum, 
while the remaining forms differ in a marked manner, having a certain degree 
of variability and asymmetry in the number of pedicels and processes. The 
three first-mentioned forms have eleven pedicels on each side of the ventral 
surface, the posterior pair being very minute and placed behind the anus, 
which is completely ventral in position. Immediately in front of the anus a 
pair of minute pedicels run out from the odd ambulacrum, which is almost 
naked or possesses one or two rudimentary almost inconspicuous appendages. 
Along each side of the body, above the pedicels, a row of six large conical 
processes is situated ; the dorsal surface bears, in addition, five or six pairs of 
such processes. 
VOL. XIJI.— NO. 1. 1 
