No. 4. — Reports 07i the Remits of Dredging under the Sujjcrvision 

 0/ Alexandeu Agassiz, in the Gulf of Mexico (1877-78), and in 

 the Caribbean Sea (1878-70), hj the U. S. Coast Surveg Steamer 

 " Blake," Lieut.-Commandek C. D. Sigsbee, U. 8. N., and Cum- 

 MANDER J. II Bautlett, U. S. N., Cumniauduig. 



(Published by permission of J. E. Hilgard, Supt. U. S. Coast and Geodetic Survey.) 



XVIII. 



The Stalked Crinoids of the Caribbean Sea. By P. Herbert Carpenter. 



Owing to the lamented death of the late Sir Wyville Thomson, it has 

 become my duty to complete the Report upon the Stalked Crinoids of the 

 " Challenger " Expedition, which had been commenced by him. It had 

 been arranged between Sir Wyville and Mr. Agassiz that the descriptions 

 of the species obtained by the "Blake" in the Caribbean Sea should be 

 incorporated in the "Challenger" report, wliich would thus assume the 

 character of a Monograj)h of nearly all the known species of the group.* 

 For this purpose nearly thirty plates were drawn at Edinl)urgh, under 

 Sir Wyville's superintendence, but, except for a few pencil notes upon 

 one or two of them, he has unfortunately left no manuscript behind him 

 of any kind. It has therefore become my duty to make good this defi- 

 ciency ; but as the other calls upon my time leave me only a limited 

 amount of leisure, I fear that some months must yet elapse before the 

 publication of the final report. 



The " Blake " dredgings have shown that the bathymetrical range of 

 the Stalked Crinoids is not always so great as has been often supposed. 

 So far as my information goes, they have only been obtained fourteen 

 times at depths exceeding 650 fathoms, their lowest limit being the cel- 

 ebrated deep dredging of the "Porcupine," in 18G9, where Bathycrinns 



* Ilycrinus carpnifrri of tlic Norwegian Nmth Atlantic E.xpeilition (Xyt I\Iag. for 

 Naturvid., Bd. XXIII., 1S77) is undoubtedly a IJathucrimis, thougli I do not tliinkit 

 is identical with B. gracUif! of the first " rorcui)in(; " Expeilition (1869). The " Vega " 

 dredged some Stalked Crinoids off the Sil)eriau coast, and also a large Mdacrinus in 

 the North Pacific, but no descriptions of them \\[\vv. yet been publislied. 



VOL. X. — KG. 4. 



