* 
412 Canon A. M. Norman—WNotes on the 
1882. Trochostoma Thomsonii, Danielssen & Koren, Norwegian North- 
Atlantic Exped., Holothuroidea, p. 42, pls. vii., vill., ix. figs. 38-41, 
pl. xiii. fig. 4, and var. maculutum, p. 94, pl. xiii, figs. 5, 6. 
1882. Trochostoma boreale, iid. ibid. p. 64, pl. x. tigs., 7-1]. 
1882. Trochostoma arcticum, iid. ibid. p. 65, pl. ix. figs. 1-5, pl. x. 
fie. 6, pl. xii. fig. 3, 
Ludvig, in ‘ Fauna Arctica,’ vol. i. Holothuroidea, p. 161, 
unites all the forms described by Danielssen and Koren 
under the Molpadia borealis, M. Sars. 
The form called Trochostoma arcticum by Danielssen and 
Koren was dredged by the ‘ Voringen’ in the Porsanger 
Fiord in 127 fathoms (Stat. 260), and in the same depths in 
the Tana Fiord (Stat. 261). 
Genus AnxyropeRMA, Danielssen & Koren. 
Ankyroderma Jeffreysti, Danielssen & Koren. 
1879. Ankyroderma Jeffreysit, Danielssen & Koren, “ Fra den Norske 
Nordhaysexpedition Echinodermer, III.,” Nyt Mag. for Naturvid. 
vol, xxv. p. 128, pls. v. & vi. figs. 11-19, 21. 
1879. Ankyroderma affine, iid. ibid. p. 133, pls. v. & vi. figs. 22-28. 
1882. Ankyroderma Jeffreysit, Dan. & Kor. Norw. N.-Atlant. Exped., 
Holothuroidea, p. 67, pls. x., x1., xii. figs. 12-28. 
1882. Ankyroderma affine, iid. ibid. p. 71, pl. xii. figs, 29-36. 
Ludvig (/. ¢.) has united the two forms to which the 
describers had assigned specific rank. 
This most interesting new form discovered by the ‘ V6- 
ringen’ was dredged at Stations 260, 261, 262, at the 
Porsanger and Tana Fiords, and also off Vard6 in 127-148 
fathoms. It possesses anchors like those of a Synapta, but 
instead of resting for support upon a single calcareous plate, 
as in that genus, they are attached at the central junction of 
the “ heads ” of five or six “ battledore ”’-shaped spicules, the 
long “handles” of which spicules radiate trom the ceutre. 
Other spicules not unlike those of a Thyonidium are pro- 
fusely scattered throughout the epidermis. 
The Ankyroderma musculus (Risso) from the Mediter- 
ranean comes very near to this species (vide Ludvig, Zeits. 
f. wiss. Zool. vol. li. p. 571, pl. xxix.). 
Genus Evupyreus, Liitken. 
Eupyrgus scaber, Liitken. (Pl. XXVII. figs. 1-3.) 
1857. Eupyrgus scaber, Liitken, Oversigt over Grénlands Nechino- 
dermata, p. 22. 
? 1857. Hupyrgus scaber, Barrett, “ Description of Four new Species of 
