108 Dr. P. H. Carpenter on some Points in 



out acknowledgment) the list of families and genera of the 

 living Stalked Crinoids described in the ' Challenger ' Keport, 

 he adds*, " Outre ces six genres, deux autres genres d'En- 

 crines ont dte decrits, le genre Ilyocrinus par Keren et 

 Daniellsen [sic), et le genre Democrinus par moi. Les auteurs 

 scandinaves s'accordent a penser que leur Ilyocrinus n'est 

 qu'un Bathycrinus alarcManus mieux ddvelopp^ que le type. 

 Je trouve cependant dans les collections du * Talisman ' 

 un crinoide d'assez grande taille, chez qui il existe cinq 

 basales non soud^es, presque aussi grande que les radiales ; 

 si cet exemplaire unique n'est pas une monstruosit^, c'est un 

 Ilyocrinus qu'on pourrait appeler Ilyocrinus recwperatusT 



This paragraph contains two serious (clerical ?) errors. 

 The name of Danielssen and Koren's genus is Ilycrinus\^ not 

 Ilyocrinus ; and Bathycrinus Aldrichianus would be more cor- 

 rect than Bathycrinus alarchianus. It may be that Prof. 

 Perrier has had some private communication with the Scan- 

 dinavian authors upon the subject ; but I have no knowledge 

 of their having published any such views as he attributes to 

 them. According to him they regard Ilycriniis [Carpenteri) 

 as a Bathycrinus Aldrichianus better developed than the type. 

 The type of what ? of Bathycrinus Aldrichianus ? This can 

 hardly be the case, for the two species are very nearly the 

 same in size, the ' Challenger ' form from the southern seas 

 being, if anything, slightly larger than Bathycrinus Carpen- 

 teri [Ilycrinus) from the North Atlantic. 



Prof. Perrier's statement reads like a paraphrase of what I 

 wrote respecting Bathycrinus and Ilycrinus in 1882. The 

 former genus was founded upon an immature specimen dredged 

 by the ' Porcupine,' which Sir Wy ville Thomson named 

 Bathycrinus gracilis \ ; and I pointed out § that " his de- 

 scription II of the larger species, B. Aldrichianus , from the 

 southern sea, seems not to have reached the Norwegian natu- 

 ralists before the publication of their genus Ilycrinus^ which 

 was founded on much more developed individuals than that 

 dredged by the ' Porcupine.' " This B. gracilis appears to be 

 the poorly developed type which is referred to by Prof. Perrier 

 in this exposition of the views of Danielssen and Koren, 

 who have not, so far as I am aware, ever made any sucli 



♦ ' Revue Scientifique, ' May 30, 1885, p. 691, note. 



t " Fra den Norske Nordhavsexpeditiou Echinodermer," Nyt Mag. f. 

 Naturvid. Bd. xxiii. 1877, p. 46. 



X " On the Crinoids of the ' Porcupine ' Deep-sea Dredging Expedi- 

 tion," Proc. Roy. Soc. Ediub. vol. vii. 1869-72, p. 772. 



§ Bull. Mus. Comp. Zool. vol. x. no. 4, p. 177. 



II " Notice of new Living Crinoids belonging to the Apiocrinidse," 

 Journ. Linn, Soc, Zool. vol. xiii. 1876, pp. 48-51. 



