No. 1. — Reports on the Results of Dredging, under the Super- 

 vision of Alexander Agassiz, in the Gulf of Mexico (1877- 

 78), in 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 " Make," Lieut.-Commander C. D. 

 SiGSBEE, U. S. K, and Commander J. E. Bartlett, U. S. N./, 

 Coniiaanding. 



(Published by Permission of Carlile P. Patterson and J. E. Hilgard, 

 Superintendents of the U. S. Coast and Geodetic Survey.) 



XXX. 



Eeport on the Holothurioidea, hy Hjalmar Theel. With one Plate. 



The 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 Zoology 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. 



Fiffures 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. XIII. — NO. 1. 1 



