HOLOTHUROIDEA. 
Eclu 10 
less distinctly opposed across the dorsal surface, or with only a few rudi- 
mental ones in its anterior part, or with a single very large one, resem- 
bling a broad, branched, or unbranched lobe and near to it some small 
papillm ; no respiratory trees; integument naked, spiculous, or plated.’* 
He describes as new genera and species : 
Deimaj forZ), validum and D.fastosum. 
Oneiraphanta ; 0. mutabilis. 
Orp)hnurgus j 0. asper. 
Cryodora ; C. spongiosa. 
Lcetmogone ; L. wyville-thomsoni and L. violacea. 
IlyodcBraon j I. maculatus. 
A chlyonice ; A . ecalcarea. 
Elpidia [see Zool. Rec. xiv. Ech. p. 4] is referred to this Order ; E. 
mollis, E. globosa, E. verrucosa, E. nana, E. murrayi, E. papillosa, E. 
elongata. 
Danielssen & Koren, N. Mag. Naturv. xxv., describe [c/. Ann. N. H. 
(6) vii. pp. 206-208] : — 
Kolga, g. n. [Elpididoi). “ Body bilateral ; a buccal disk, furnished with 
ton tentacles, turned towards the ventral surface ; anal aperture on the 
dorsal surface, near the posterior extremity ; on the anterior part of the 
back a projecting collar, furnished with papillae; just in front of this, 
and usually concealed by it, are two apertures, one for the generative 
organs, the other for the stone-canal ; feet on both sides of the body and 
around its posterior extremity ; sexes separate; no ‘lungs’.” For K. 
hyalina, sp. n. (7P 59' N., 11° 40' E.), pp. 83-106, pis. i. & ii. 
Acantliotrochus, g. n. “ Body cylindrical, apodal, rounded at the poste- 
rior extremity ; sexes separate ; no intestinal appendages ; skin furnished 
with two kinds of differently formed calcareous wheels ; the one kind 
has winged radii, and teeth issuing from the inner margin of the peri- 
phery ; the other is more than twice as large, and has also winged radii ; 
but from the outer margin of the periphery there spring long teeth 
turned inwards. Twelve digitate tentacles, which can be concealed in the 
body.” For A. mirabilis, sp. n., 73° 47' N., 14° 21' E., pp. 115-122, pi. iii. 
fig. 8. 
Ankyroderma \_Ancy-'], g. n. “ Body cylindrical. Anterior end trans- 
versely cut off. Buccal disk furnished with 15 tubular processes, alternat- 
ing with 15 oblong depressions, in which there are 15 papilliform tentacles. 
The posterior extremity produced into a tail-like process. Cloacal aper- 
ture surrounded by 5 papillae. Skin furnished with perforated papillae, 
together with calcareous bodies consisting of 5 to 6 spatulate calcareous 
rods, arranged in a stellate form, from the centre of which rises a 
calcareous anchor. No feet. Two intestinal appendages.” For A. 
Jeffrey si and A. affine, spp. nn., pp. 128-137, pi. v. fig. 11, & pi. vi. fig. 22. 
To the genus Trochostoma, D. & K., belong T. boreale, M. Sars,J T. arcti- 
cum, Marenz,, and T. ooliticum, Pourt. 
Hutton (20) makes the new genus Pentadactyla for Thyone longidentis, 
Hutton, and describes as new species — 
Cucumaria thomsoni. 
1880. [voL. XVII.] D 3 
