eee 
C.F. Liitken on Ophiurans. 61 
er; joined at apex; their outer ends separating the mnetuhiead 
om the innermost arm -plate. Teeth narrow, pointed, shape 
like a spear-head. Mouth-tentacles coming from slits which lie 
just within the innermost arm-plate, and which open — 
into the mouth-slits giving them the appearance of a Thes 
slits for the tentacles are surrounded with from four to eight nti 
pille. Arms conical and pointed; short or of moderate length. 
Upper arm-plates somewhat broad. Lower arm- plates seldom 
touching each other, by reason of the side arm- plates which lap 
over and meet on the middle line of the arm. Tentacle-scales 
one to four. Spines short and smooth, generally arranged in © 
three rows, on the outer edge of the side arm- plate, and pressed 
close to the arm. a frames furnished with m mouth-papillee. 
Species: O. affinis, O.carnea, O, Stuwitzii, O. nodosa, O. squamosa, 
0. albida, O. Sarsii, O. Wetherelli (London clay), two species from 
the chalk, and O. abyssicola, which may be an Ophiocien. This 
genus is essentially of the cold sea-belt, sonth of 30° North Lat. 
hiocten.—Dise invested with scales, which are covered with 
flat grains and larger or smaller round spots. Incision, in dise 
ve arms, slight, not deep enough to receive an_upper arm- 
plate: on its edge a continuous comb of papilla. Openings for 
the mouth-tentacles as in Ophiura, but not opening into the 
a pec Outer edges of first two or three u arm-plates 
pes apille. One tentacle-scale. Radial shields, mouth- 
ields, rs ecnih daisies teeth, arms, lower arm- plates, arm 
— aria and mouth-papille as in Ophiura. Species: Ophiccten 
yess ee ores car ey: small and narrow. No 
round the incision in the disc. Innermost tentacle-pores not 
ciguely side bya side. As this group is put titeenk i in  Sys- 
m der Asteriden,” the name Ophiolepis should be reserved 
is. It is limited to th e hot zone and embraces O. ann 0. 
cincta, O. variegata (Liit.), O. pacifiea (Liit.), O. paucispina (Say), 
an undescribed West-Indian species and two new species from len 
the west coast of America. 
Szconp Sertes—Type of Ophiocoma.* 
Mouth-shields small and rounded, not extending ar wap into 
the interbrachial spaces, so that the inner ends of — 
* Dr. Li h of the bel 
he seer to wagten «tenn ed ‘ Gnae veto tae came work, Sitirke he prt seat of ved the 
at greater length. The sas; a new Ophiurans d 
descri he tw ty Deki es on (Sar Oki ) Ophiura nar (Lito 
pened z ; bac) Opitedaeen Li ‘Opiate inlepis v at ns ‘ ‘opt 
zi Kriyeri ariegata (Lit 
pacijica (Liit.), and another not yet : ara ie sp 0. “triloba a Ophiotpi 
