KEPOET 02^ THE HOLOTHUEIOIDEA. 
179 
Ccius6 0 . rcticiilcit© cipp6flitiric6. A. clcirk browmsli circulcir ring surrouiicls tli6 biisGS 
of the papillae, and this ring is in its turn encircled by a second whitish ring, 
which is especially distinct on the back. The upper part of the papillae is whitish. 
The papillae along the angles of the body, however, are not enclosed by these rings, 
which are confluent and form an irregular, undulated dark line along each side above 
the row of papillae and another line, though more indistinct, on the ventral surface. 
The calcareous ring (PI. ^ II. fig. 11 , f'j is of the usual shape without posterior 
processes. A single large madreporic canal with the free end enlarged and pear-shaped, 
and several (seven) Polian vesicles are present. The reproductive organs are made up 
of a single bundle of long, cylindrical, narrow tubes, which are bipartite or tripartite 
only at the base. 
The integument is not very thick, and contains tables and knobbed buttons. The 
tables (PI. VII. fig. 11, a, h, c) are robust, and their perforated disk is mostly smooth on 
the margin and convex on the inner surface ; I have sometimes seen spines on the 
margin. The spire is usually short, about 0‘048 mm. long, broad and built up of 
four rods, united l>y a single transverse beam under the top, which is mostly rounded 
and covered with spines. Among these taldes I have also seen others with the spire 
more slender and with two transverse beams and also a few with a larger, more 
irregularly reticulate disk and a slender, longer spire with about three transverse beams. 
The most common buttons (PI. VII. fig. 11, d) are oval, with six holes and two knobs on 
the middle beam and some less prominent ones on the margin. Their length is about 
0’04 mm. But I have also found much more elongated buttons with numerous holes 
in two rows and many knobs, so that the margin becomes very uneven. A series of 
transitional forms is to be found between the extremes. The papillae are strengthened 
by strong, curved rods (PI. VII. fig. 11, e), with perforated ends, and dilated 
and provided with holes, at the middle only, or along one or both sides. Semper’s 
Holothuria squamifera is doubtless nearly allied to this species of Jaeger, which, how- 
ever, is devoid of smooth buttons, &c. 
TIolothuriu vmpatiens, Forskaal, 1775 (PI. VII. fig. 9). 
Habitat . — Fiji Islands ; a single specimen. Sandwich Islands ; one specimen. 
The incomplete specimen brought home by the Challenger Expedition from the Fiji 
Islands has a length of about 95 mm. The calcareous ring, tentacles, &c., are destroyed. 
The colour in alcohol is pale greyish or reddish-brown, excepting along the dorsum, 
where it is auburn. The rounded warts which carry the j)edicels are pale, inclining to 
yellowish, excepting along the back, where they are darkish brown. The surface of the 
perisome is rough from the spinous tops of the tables. The tables (PI. VII. fig. 9, «, 5, c) 
have a height of about 0’068 mm., and their disks measure O’ll mm. in diameter. The 
