CHAP. II.] MADEIRA TO TEE COAST OF BRAZIL. 87 



the stem of another form, for which I propose the name Ilyo- 

 crinus £etheUianus, of which we afterward got one or two 

 complete specimens and several fragmentary portions, again as- 

 sociated with JSathycrinus, at Station CXLVII., lat. 46° 16' S., 

 long. 48° 27' E,, about 8Y miles to the westward of Hog Island, 

 one of the Crozet group. For the sake of conveniencfe, I will give 

 a preliminary sketch of these two new crinoidal forms together. 



I described and figured in " The Depths of the Sea" (p. 452), 

 under the name of Bathycrinus gracilis, a delicate little crinoid 

 which we dredged from a depth of 2475 fathoms to the south 

 of Cape Clear. I believe, from the structure of the stem and 

 calyx, and from the somewhat peculiar sculpture common to 

 both, that the first of the two forms which I have now to de- 

 scribe must be referred to the same genus. 



In Bathycrinus AldricTiianiiS (Fig. 23), the stem in full- 

 grown specimens is 200 to 250 mm. in length, and about 2 mm. 

 in diameter across the enlarged articulating end of one of the 

 joints. The largest joints of the stem have a length of about 

 4 mm,, and they rapidly shorten toward the base of the cup. 

 They are dice-box-shaped, and have the ends beveled off on 

 different sides alternately, for the accommodation of masses of 

 muscle. Toward the base of the stem a few strong jointed 

 branches come off and form a sort of imperfect root of attach- 

 ment. The cup consists of a series of basals, which are sol- 

 dered together into a very small ring scarcely to be distin- 

 guished from an upper stem-joint. Alternating with these are 

 five large triangular first radials ; these are often free, but in 

 old examples they also are frequently anchylosed into a funnel- 

 shaped piece. The second radials are articulated to the first by 

 a true joint with strong bands of contractile fibre ; they are 

 broad and flat, with an elevated central ridge, which is contin- 

 ued down upon the first radials, though in these it is not so 

 marked ; and lateral wing-like extensions, which curve up at 

 the edges and are thus slightly hollowed out. In the third 



