218 
THE VOYAGE OF H.M.S. CHALLEHGEK. 
asymmetrical buttons have very often more than six holes, though this number 
is the most common. The papillae have a very rudimentary terminal plate, and 
curved, rod-like, perforated deposits. Besides, both pedicels and papillae contain 
numerous crowded buttons and tables, and near the end bilateral perforated 
plates. 
Holothuria decorata, von Marenzeller, 1881. Labidodemas neglectum, Haacke, 1880 
(according to Ludwig, 1883). 
Halitat . — Japan (von Marenzeller, Ludwig), Mauritius (Haacke, Ludwig). 
According to Ludwig, this is probably the young of the former, and, indeed, there 
do not seem to be any distinguishing characters of sufficient importance to justify 
its reception as a new species. Some of the tables have as many as three trans- 
verse beams in the spire, and the buttons have generally eight holes. 
Holothuria raacleari, Bell, 1884. 
Hcibitat . — Clairmont and Bird Islands in North-East Australia (Bell), Island of 
Eodriguez (Bell). 
Bell says : “ As will be seen from the figures, the spicules of this species 
present a considerable resemblance to those of Holothuria tigris, with 
which, as it would seem, it must be closely allied.” The pedicels, however, form 
three longitudinal rows, the dorsal surface has papillae, and, finally, the figured 
deposits seem to bear as great a resemblance to those of Holothuria monacaria 
as to those of any other form. A re-examination is necessary. 
(2) Ventral pedicels not arranged in longitudinal series. 
Holothuria humilis, Selenka, 1867. 
Ambulacral appendages — pedicels. The tables with not very large disks, and with 
the spire terminating in eight teeth. Buttons very flat, of usual shape. All 
the pedicels with supporting rods, but the' ventral alone possessing terminal 
plates. Calcareous ring very small and of uncommon shape, its ten pieces 
being very small, round, and brown. 
Habitat . — Sandwich Islands (Selenka). 
Distinguishable from the following species mainly by the peculiar calcareous ring 
which is unlike that of any other Holothurian. 
Holothuria vagahunda, Selenka, 1867 ; Semper, 1868. Stichopus (subgenus Gymno- 
chirota) leucospilota, Brandt, 1835 (according to Ludwig, 1881). 
Ambulacral appendages — pedicels. The tables with not very large disk and with the 
spire terminating in eight to ten teeth, placed round the nearly circular aperture 
