12 



NATURAL HISTORY BULLETIN 



more than 1 mm. wide, while the fourth is about as wide and is 

 fully a millimeter high; succeeding segments are much nar- 

 rower. It will be at once noted that these pinnules are utterly 

 different from Hartlaub's fig. 6, pi. IV, but they are apparent- 

 ly identical with those sho^^^l in the photograph, fig. 4, pi. XII. 

 No doubt Hartlaub has at least two distinct species confused 

 under his ''variety ornata!" The arm-fragments at hand 

 agree perfectly in ornamentation and in pinnules with the 

 whole specimen and there is no doubt of their identity. 



Station 9. Cuba: off Havana, 200 fms. Arm-fragments. 



Station 16. Cuba: off Havana, 200 fms. 1 good specimen. 



Cocometra hagenii 



Comatula (Alecto) hagenii Pourtales, 1868. Bull. M. C. Z., 1, p. 111. 

 Cocometra hagenii A. H. Clark, 1908. Proc. Biol. Soc. Washington, 21, 

 p. 128. 



Aniedon hageni Hartlaub, 1912. Mem. M. C. Z., S7, p. 389; pi. VIII, figs. 

 1-12. 



The vast majority of the crinoids in the Iowa collection be- 

 long to this common species. In the "Narrative" (p. 164), 

 Professor Nutting says that "great numbers of crinoids were 

 collected" on the Pourtales Plateau. On one occasion, "as the 

 bar neared the surface and the tangles themselves could be seen 

 rising through the blue water, we noticed that a stream of 

 brownish objects was trailing after it, as if innumerable mossy 

 bits were floating away from the hemp strands. "When the 

 tangles came on board we found them literally covered with a 

 mass of crinoids, all of one kind and quite small. We estimated 

 that at least five hundred specimens came up in that haul and 

 it was evident that hundreds or thousands had washed off 

 during the ascent of the tangles from the sea-bottom. This 

 was probably the greatest number of any one species obtained 

 at a single haul during the entire cruise. The bottom must 

 have been actually packed with them in spots." There is no 

 doubt that the crinoid here referred to is Cocometra hagenii. 

 There is little doubt that Hartlaub's figures represent more 

 than a single species and it is difficult to determine which 

 really illustrate hagenii. 



