PART 5 A MONOGRAPH OF THE EXISTING CRENOIDS 829 



indebted for the information) tells me that the specimen from Blake station 150 is 

 designated as the type of balanoides. It has the centrodorsal 4 mm. in height and 3 

 mm, in basal diameter, though the maximum diameter is a little greater. Fortunately, 

 both stations are close together in the vicinity of Nevis in the Leeward Islands at 

 667( 16) meters, which will suffice for the type locality, but if a holotype is designated, 

 despite the labeling, it should be the one figured by Carpenter from Blake station 151. 

 History. The first specimen of this species to be obtained \vas dredged in 1869 by 

 the Bibb at station 139P off Cuba. Two small comatulids were taken which Count 

 Pourtales later in the same year described under the name of Antedon cubensis. His 

 description, however, applied only to the larger specimen, which is the type of what is 

 now called Trichometra cubensis, and he made no reference to the characters of (lie 

 smaller and more mutilated individual. 



Ten years later, in 1879, Pourtales recorded this species again under the name of 

 Antedon cubensis from Blake station 43. He remarked that the two damaged specimens 

 lacking cirri and arms differed somewhat from his type specimen, but possibly the dif- 

 ferences were due to age. He then described one of these specimens in considerable 

 detail and remarked that a smaller equally mutilated specimen had previously been 

 dredged by himself at Bibb station 139P. 



In 1881 in his preliminary report on the comatulids collected by the Blake and 

 other American ships, Carpenter recognized the fact that the two specimens from Blake 

 station 43 and the smaller and more mutilated one from Bibb station 139P were very 

 similar to one another and entirely different from the type specimen of Antedon cubensis. 

 He mentioned other examples of the same nature as these three from Challenger station 

 122 and Blake stations 150, 151, 222, and 260. 



The peculiarities of these crinoids were discussed by Carpenter at considerable 

 length, and he conferred upon them the new generic name Atelecrinus. The original 

 specimen from Bibb station 139P was so different from those obtained later that^he 

 regarded it as a distinct species which he called, using Pourtales' name, cubensis; the 

 others he considered as representatives of a new species which he called balatioii/i*. 

 He gave figures of the single specimen of Atelecrinus cubensis from Bibb station 139P 

 and of the best specimen of A. balanoides obtained, which was from Blake station 151, 

 as well as of parts of another specimen which he dissected. 



In 1882 Carpenter published a formal diagnosis of the new genus Atelecrinus (se- 

 lecting as the type species A. balanoides) as well as descriptions of the three known 

 species, balanoides, cubensis, and wyvilli, the latter, from Challenger station 174, being 

 here mentioned for the first time. 



In the Challenger report on the stalked crinoids (1884) Carpenter discussed the 

 peculiarities of the genus Atelecrinus at considerable length. He mentioned A. cubensis 

 from the original locality off Cojima and A. balanoides from Challenger station 122 and 

 Blake station 43. 



In the Challenger report on the comatulids (1888) Carpenter recapitulated the his- 

 tory of this genus and its species. He redescribed the genus in great detail and rede- 

 scribed and figured A. balanoides, which he gave as from Challenger station 122 and as 

 "also obtained by the U.S. Coast Survey steamer Blake at live stations in the Carib- 

 bean Sea between 291 and 422 fathoms [532 and 771 meters]." Atelecrinus cubensis 

 was included in the key to the species of the genus, but was not formally described. 



