240 THE VOYAGE OF H.M.S. CHALLENGER. 



appeared iu the Journal of tlie Linnean Society, aud also in The Atlantic. There 

 can be no doubt that the head there represented is that of Bathycrinus campbel- 

 lianus, owing to the strongly marked serration of the arm -joints, and the character of 

 the pinnules. In fact the figure given in The Atlantic is definitely stated to represent 

 the specimen from Station 106 ; while the fragment of a stem which it shows is entirely 

 difierent from the upper part of the stem of Bathycrinus aldiichianus represented in 

 PI. VII. fig. 11. The numerous thin joints immediately beneath the cup, which are so 

 characteristic of the genus, are not properly represented in the woodcut, and the joints 

 just below where these ought to be are considerably longer than one would expect to 

 find so near the cup. It may be assumed that Mr. Wild's drawing was photographic in 

 its accuracy, so far as he could make out the structure of the small specimen ; but errors 

 may have crept in during its reproduction on wood, and the cut was published during 

 Sir Wyville's absence from England, so that he had no opportunity of revising it. 

 Under these circumstances, therefore, it appeared preferable to say nothing about the 

 stem in the specific diagnosis given above, rather than to attempt to describe it from 

 a probably incorrect woodcut. 



Two irregularities in the arrangement of the pinnules appear in this specimen. In 

 one case the sixth brachial is not free as it normally is, but is united to the seventh ; 

 whUe the eighth is free instead of the ninth, and bears the first pinnule. In the other 

 case the ninth brachial is not free as usual, but is united to the tenth, which bears a 

 pinnule, so that there are only two free joints, the third and the sixth. 



In his first account of the Challenger species of Bathycrinus, Sir WyviUe Thomson ^ 

 stated that " as the stalked Crinoids are perhaps the most remarkable of all the deep-sea 

 groups, both on account of their extreme rarity and of the special interest of their 

 palseontological relations," he meant " to associate the names of those naval officers 

 who have been chiefly concerned in carrying out the sounding, dredging, and trawling 

 operations with the new species whose discovery is due to the patience and ability with 

 which they have performed their task." In accordance with this idea Sir WyviUe 

 established the new species Hyocrinus hethelUanus and Bathycrinus aldrichianus ; and 

 he left the MS. names Bathycrinus campbellianus and Pentacrinus naresianus upon 

 the proofs of two of his plates. These names I have of course adopted. They refer to 

 Lieutenant Lord George Campbell, and to Admiral Sir George Nares, who commanded 

 the Challenger during the earlier part of the cruise. 



> Journ. Linn. Soc. Land. (ZooL), 1876, vol. siii. p. 47. 



