EEPOKT 01^ THE HOLOTHURIOIDEA, 
235 
(Mus. Holm.) Several specimens dredged at Mauritius, Ton-es Strait, Gulf of Siam, 
Fiji Islands, Singapore, Java, and Port Hatal. The colour is somewhat variable 
in the different mdi\dduals. In that from Mauritius, which has a length of 
170 mm., the dorsal surface is cinereous, with almost black transverse hands 
corresponding to transverse furrows, and with a few small whitish bands or 
spots ; the ventral surface is yellowish-white, and the papdlse are surrounded 
by a small dark circle. The specimen obtained at the Fiji Islands has the 
back much paler and punctated, provided with a few larger darker spots, but 
devoid of the blackish transverse bands. The specimens from Java and 
Singapore also possess such transverse bands, but in the latter the bands are 
whitish, with black outlines. Anus not very distinctly stellate. Mouth 
surrounded by a brim-Hke circle of papillje. AU the ambulacral appendages are 
papillse, not pedicels as Selenka says ; the ventral are sometimes slightly larger 
than the dorsal. The internal organisation agrees with that described by Selenka. 
The solid tables have the spire built up of four rods and one transverse beam, 
and terminating in sixteen to twenty-five teeth, or even more. The disks of 
the tables are mostly well-developed, smooth on the margin, and pierced by 
a larger central hole and a peripheral circle of small ones. The buttons vary 
slightly in shape, but are mostly oval with six holes ; they are seldom or never 
entirely smooth, but more or less distinctly provided with knobs. I often found 
only two knobs placed on the middle beam, but not unfrequently knobs, or at least 
rounded elevations may be met with on the periphery. Here and there more 
dehcately constructed buttons, provided with more prominent and numerous 
knobs, are to be observed. The papdlce are supported by a very rudimentary 
terminal plate, by transverse rods enlarged and perforated at the middle and 
at each end, and by larger and longer almost completely smooth buttons, often 
with more than six holes. 
Holothuria aculeata, Semper, 1868. 
Habitat . — Philippine Islands (Semper). 
The deposits of this species seem to be scarcely distinguishable from those in the 
preceding one, with which it must be nearly allied. Possibly the buttons are 
of a more irregular shape and have the margin more obviously undulated. 
Semper figures six knobs on these buttons. Besides, this species is in possession 
of five indistinct groups of papillse round the anus. A re-examination is necessary. 
Holothuria fusco-punctata, Jseger, 1833 ; Semper, 1868. 
The tables like those in the preceding form, excepting that the disks are reduced to a 
simple ring with some small irregular processes. The buttons are slightly 
irregular, oblong, with an undulated margin ; they have numerous knobs and 
about twelve holes. 
