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REPOET ON THE HOLOTHUEIOIDEA. 211 
almost certainly Semper also, have drawn the tables with the spinous truncated 
end downwards, supposing the conical top, which carries a few minute spines, 
or none, to be directed outwards from the skin. This may, however, be 
wrong. The tables are totally destitute of disks, the four rods being bent 
inwards and united at the pointed or rounded base ; near the base, each of the 
four rods constituting the spire often carries a small spine. At the middle the 
spire has a transverse beam, and its outwardly directed, truncated top bears 
eight to twelve double teeth. Supposing that even Semper is mistaken when 
he states the spinous ends to be the disks of the tables, there is evidently the 
greatest conformity in the tables of the two species in (][uestion. AVith 
regard to the bars, on the contrary, there exist some small differences. Those 
in Solothuria suTinciTnensis are even elongate and of solid construction, but 
carry along each side only a series of processes, which often become com- 
bined wdth each other towards the ends of the bars, so as to form some small 
holes on each side ; these bars often bear near their extremities some minute 
rough elevations on their upper and under surfaces, but, for the rest, they seem 
to be quite smooth. Even the pedicels and papillse are supported by such bars, 
which are slightly stronger and have the processes more commonly united with 
each other, thus forming more perforations than in the bars of the body-wall 
itself. 
Holothiiria fusco-coei'ulea, n. sp. 
Ventral pedicels and dorsal papillce. Deposits like those in Holothuria flavo-macvMta 
above described. Tentacles twenty-nine. 
HcMtat . — Tahiti (Mus. Hohn.). 
The species is certainly closely allied to Holothuria Jiavo-maculata, but is distinguished 
by the uncommon number of tentacles and the shape of the ambulacral 
appendages. Body cylindrical. Anus round, with five pairs of small papill?e. 
The ambulacral appendages are small, of almost equal size, and more thinly 
scattered ; the dorsal ones are obviously of a conical form, while the ventral are 
cylindrical. Anteriorly, and still more posteriorly on the ventral surface, conical 
papillje are placed. The tentacles are surrounded by a brim of papillse. The 
figure drawn by Semper, turned upside down, gives a very correct idea of the 
shape of the tables. The elongate, cylindrical or fusiform, densely knobbed or 
spinous bars closely resemble those in Semper’s species. The conical papilla- 
are strengthened by a very rudimentary terminal plate and some slightly 
curved and spinous rods, which sometimes have the ends shghtly branched or 
perforated. The pedicels possess a comparatively large terminal plate, and a 
number of irregularly perforated elongate plates. Besides these deposits, the 
pedicels and papillcB contain numerous crowded tables and spinous rods of the 
same kind as those in the body-wall itself. There are two long slender Polian 
vesicles and three madreporic canals. Colour — blackish, incHning to bluish 
tentacles light brownish or yellowish ; pedicels and papillte yellowish-brown. 
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