8 Ech. 
EC H INODE R MATA. 
A mpldlepis patens, i^apyracccij and tenuis. 
Ophiactis resiliens, flexiiosa, cuspidata, nana, hirta, and canotia. 
Ophiostigma africanum. 
OpMopoUs japonica. 
Ox)hioc1iondrus stelliger. 
Ophioconis antarctka pulceriilenta. 
Opliiomyces grandis and spathi/er. 
Pectinura arenosa and heros. 
Ophiopeza aster. 
Ophiothrix uristulata, capillaris, herheris, and ccespitosa. 
OpMocliiton lentils. 
Ophioglypjha meridionalis. 
Ophiacantlia discoidea, Valenciennes i, normani, and ahnormis. 
Aslvotoma murrayi. 
Astroceras, g. n. Disk and arms covered with smooth soft skin ; disk 
small ; its interbrachial outlines re-enteiingly curved ; radial shields nar- 
row and rather high, running nearly to centre ; arms somewhat knotted 
by a contraction between each pair of joints ; upper arm-plates divided 
in halves like high ribs, bearing a jointed spine at their upper end ; side 
arm-plates, towards middle of arm, having a long process to which are 
articulated the two spine-like tentacle-scales ; teeth, a clump of grains on 
sides of mouth-angles, answering to mouth-papilloe ; two vertical genital 
openings. Stands next OpMocreas and Astroschema, and resembles 
Eiiryale asperum in its peculiar elongated side arm-plates bearing spine- 
like rough tentacle scales, and by the largo spines on the upper surface of 
the arm. For A. perzamena, sp. n. 
OpMocreas carnosus, caiidatus, abyssicola, and ccdipiis. 
Astroscliema horridum, salix, hrachiatum, tiimidum, and ruhriun. 
Astroclon, g. n. Arms beginning to branch at a considerable distance 
from the disk, and having but few forks, nearly as in Trkliaster. Disk 
rising well above the arms, and granulated, as arc the latter. The tips 
of the twigs are encircled at each joint by a double belt of hook-bearing 
grains. Along the under surface of the base of the arm are two longi- 
tudinal lines of large, transverse slits, a pair to each joint, from which 
issue short tentacles ; and above them on either side is a row of peg-like 
tentacle-scales. Mouth angles naked on their sides, but with a bunch of 
spine-like papillm at the apex. Two very large genital openings in each 
interbrachial space. For A . propugnatoris, sp. u. 
There is added to this paper an “ Index to Species of OpMuruhe and 
AstropJiytidoi,'^ which is valuable as giving references to Lyman’s 
descriptions of the specimens obtained by L. F. de Pourtales on the 
U. S. Coast Survey, and by the ‘ Hassler,’ ‘ Blake/ and ‘ Challenger ’ 
Expeditions; “the whole forming a list of the greater portion of the 
deep-sea Ophiurans and Astrophytons now known 
OpMotliela dividua, sp. n., Von Martens (19). 
Aspidura (Pohlig) : see Eck, Z. geol. Ges. xxxi. pp. 35-53. 
Duncan (11) describes as new: — 
Ophioglypha forhesi, p. 449, striata, sculpta, and sladeni. 
