•242 THE VOYAGE OF H.M.8. CHAL7.ENGER. 



;iliniir the centre of the joint, and is eontinuocl on to eaeh of the arm-l)ases, M'here it disappears 

 after about tlie first eight joints. These have sharp lateral edges where their flattened 

 sides meet the dorsal surface. The first thi'ee or four are wider than long, their successors 

 gradually liecoming more cylindrical, but never much longer than wide and not over- 

 lapping, so that the dorsal surface is smooth. The third joint is sometimes the only free 

 one. all its successors being united in pairs ; while in another case tlie fourth is free as 

 AvcU us the third, and also the seventh and tenth, the intermediate pairs being united. 

 In a third variety three pairs after the third brachial are united, and the tenth is free 

 again, while the remainder of the arm is normal. Tliere are fiftv joints in an arm 

 30 mm. long {fde C. W. T.). 



The first pinnule is generally on the ninth, l)ut sometimes not till tlie eleventh 

 brachial. The pinnule attachment is near the end of the joint, so that the socket enters 

 into the composition of the terminal face (PI. Vila. fig. 21). The joints of the lower 

 pinnules are not greatly larger than those of tlieir successors. The disk is unprotected 

 by i:)lates. 



Colour, in spirit, white. 



About a dozen heads and several stems, some retaining the basals. 



Localities.— Station 146. December 29, 1873 ; lat. 46° 46' S., long. 45° 31' E.; 

 1375 fathoms ; Globigerina ooze ; l)ottom temperature 36°'6 F. 



Station 147. December 30, 1873 ; lat. 40° 16' S., long. 48° 27' E.; 1600 fathoms; 

 Diatom ooze; bottom temperature 34°"2 F. 



I have no record respecting the number of individuals obtained at each Station. 



According to Sir Wyville Thomson' this species " seems to be widely distributed ; we 

 have detected fragments of it at at least six or seven Stations in the Atlantic and the 

 Southern Sea." 



Remarks. — The head of this species is readily distinguished from that of Bathycfiuvs 

 camphelliamis l)y the calyx lieing constricted at the basiradial suture, and not in the 

 radial funnel above it ; Ijy the greater width of the arm-bases, and by the smoother 

 dorsal surfjice of the arms. In the first of these characters it resembles Bathycrinvs 

 carpenteyl, so far as can be made out from Danielssen and Koren's figure; but it is much 

 more robust than the northern species, in which the axillaries are considerably shorter 

 than the second radials, while the lower stem-joints are relatively longer, and have much 

 more expanded ends than those of Bathijcrimis aldrtchianiis, in which the dice-box shape 

 is less apparent. 



When the collection of Stalked Crinoids came into my hands, T found one bottle 

 lalielled " Pterocirnus and Hijocrinus, Stations 140 and 147." As I had never heard of 

 the foi-mer genus, my curiosity was much excited, and it was with considerable 

 disappointment that I found the contents of the bottle, besides Hyoerinv.^, to consist 



' .Tniiru. Liini. Snr. Liniil. (Zool.), vol. xiii. p. "il (ISTG) 1S78, 



