ASTEROIDEA. OPHIUROIDEA. 
Ech. 8 
Diplopter aster ^ p. 400, g. n., for Pteraster multipes of Sars ; distin- 
guished by having the suckers in four rows, and the horizontal radiating 
interbrachial spines of the lower surface embedded in and concealed by 
a thick skin when adult (exposed in the young). 
Ltiidia elegans ?, Perrier ; if the form here ascribed to that species be 
rightly so, Perrier described a very young example. 
Tremastei% g. n. “Body thin, pentagonal, the rays united by a thin 
inter-radial web, extending to their tips. Five inter-radial openings, 
situated toward the centre of the disk, pass directly to the lower side, 
where they open at the ab-oral side of the jaw* plates. Ambulacral 
grooves wide toward the mouth. Suckers in four rows. Upper surface 
covered with imbricated flat plates, which may bear granules and mar- 
ginal spinules. Lower surface with small imbedded plates, bearing 
spines.” For T. mirabilis, sp. n. Yerrill, Proc. U. S. Nat. Mus. ii. p. 201. 
Porania spinulosa, sp. n., id. 1. c. p. 202. 
Leptaster, g. n. (Gouiasterid), for L. martini ; P. de Loriol, Abh. schw. 
pal. Ges. vii. No. 6, p. 5. . 
Astropecten mahillii^ sp. n., id. 1. c. p, 9, both from the ‘ l^tago 
bathonien,’ both figured. 
OPHIUROIDEA. 
Certainly the most important contribution this year to the system of 
this group, is Lyman’s Preliminary List (28), which is wonderfully com- 
plete. 72 genera of Opliiuridoi and 14 of Astrophytidce are mentioned. 
Of the former, there are 612 species (of which Opliioglypha has 59, 
Amphiura 89, and Ophioihrix 57 species), and of the latter there are 52 
species ; of these numbers he (27, p. 7) states that 20 new genera and 167 
new species were brought by the ‘ Challenger.’ 
Amphipolis luetlceni, Ljungm., = Amphiura luetheni^ bo Amphiura luet- 
keni^ Duncan, is altered to A. duncani^ Lyman, p. 18 ; and A. jflexuosa, (P) 
Lyman (nec Ljungman), is altered to A. palmer i., p. 17. 
Lyman (27) describes as new genera : — 
Ophioiholia. ‘‘ Disk and arms capable of being raised vertically ; the 
former covered by a delicate scaling set with minute spines. Mouth- 
angles clothed with several rows of wide flat mouth-papillro (as in Ophio- 
myces)j and with a single row of slender sharp teeth. On outer joints of 
arms, near margin of each side arm-plate, is a tuft of minute, translucent 
supplementary spines or pedicellarim, which have the form of a long- 
handled parasol. They stand a little inside the true arm-spines, which 
are continuous to the end of the arm.’’ 0. supplicans, sp. n., p. 4, pi. i. 
figs. 1-3, taken at 1826 faths., S.W. of Juan Fernandez. 
Ophiohelus. “ Disk covered with a delicate film-like scaling, without 
radial shields. Arm-bones composed of two halves, like curved bars, 
lying side by side, joined at their ends, and enclosiug an oval hole. 
Mouth-papillae spiniform, and arranged in a single row; teeth similar ; 
no teeth-papillae. On the outer joints of the arm, the true arm-spines 
cease, and are replaced by two or more rows of minute spines, or pedi- 
cellariae, which have the form of a long-handled parasol. 0. umhella^ 
