Bd. VI: 8) 



THE CRINOIDEA. 



13 



The joints of the pinnules, outside the widened ones, are fairly slender, smooth, 

 the distal ones slightly thorny on the outer end (PI. II, Fig. 5; textfig. 11). The 

 articulations are not swollen. 



A pair of curious abnormalities were observed. In one case the fourth pinnule 

 has been doubled, a smaller extra pinnule developing at its base, but independent of 

 it (Fig. 9); it is directed downward along the armside, and had the ambulacral furrow 

 developed. The other case was a bifurcating pinnule; the bifurcating joint is the fourth. 



Some thin, irregular, fenestrated plates are developed along the borders of the 

 ambulacral furrows (PL II, Fig. 5); they represent the side- and coverplates, the latter 

 being the larger. They are, however, not always so well developed; the side plates 

 are often irregularly arranged, so that it is difficult to find the one corresponding to 

 each coverplatc; they may even be totally wanting. Also the cover plates 

 may be reduced to a simple spicule, at intervals even totally disappearing. 

 Spicules, in the shape of short, straight, thorny rods (F"ig. 12) may occur 

 in the tentacles, but very inconstantly; sometimes there may be quite a 

 bundle of them in a single tentacle of a pinnule, the rest of them being 

 entirely devoid of spicules. 



Sacculi generally fairly regularly developed on the pinnules, less so on 

 the arms and apparently entirely wanting along the ambulacral furrows on 

 the disk. They are very pale and inconspicuous in the preserved specimens. 



Disk naked. The mouth slightly eccentric; the anal cone nearer the 

 oral corner of its interradius. The interradial areas may be quite narrow, 

 pressed in by the cirri rising between the arms (PI. I, P'ig. 10). 



Most of the preserved specimens are pure white. There are no indica- 

 tions of the color in life. 



This species was taken at the following localities: 



Station i (33° o' S. 51 10' \V. 80 m.) i specimen. 



2 (37° 50' S. 56° 11' W., Coast of N. Argentina, 100 m.) . . . . i =' 

 5 (64° 20' S. 56' 38' W., Graham region; SE. of Seymour IsL, 



150 m.) 3 specimens. 



» 5 a (64° 20' S. 56" 38' W. 150 m.) I specimen. 



>' 58 (52° 29' S. 60° 36' W., Burdwood Bank, S. of Falkland Isl, 



197 m.) I » 



» 59 (53° 41' S. 61' 10' W., Burdwood Bank, 137 — 150 m.) .... 9 specimens. 



Fig. 12. 



Spicules of 



tentacles of 



homeira 



vivipara. 



3°°/i. 



Dr. K. A. AndersSON referred the present species to Aiitcdon liirsuta P. H. 

 Carpenter. That it has nothing with that species to do was pointed out by A. H. 

 Clark (op. cit.), who referred it to his genus Isoinetra, thinking that it might pos- 

 sibly be identical with the type species of that genus, /. angustipinna (P. H. CAR- 



