REPORT ON THE HOLOTHURIOIDEA. 
203 
These pedicels are supported by a well-developed terminal plate and numerous 
transverse rods. Scattered among the dorsal pedicels other ambulacral 
appendages may be seen, which, being shghtly larger than the dorsal pedicels 
themselves, present an obvious conical form, and may evidently he regarded as 
papillce. These papillae are supported by a great number of rods, hut their 
terminal plates are very reduced. According to Selenka, the ambulacral append- 
ages are devoid of supportmg rods. The rosettes in the body-wall itself 
are mostly very incompletely developed, either resembhug simple x -shaped 
bodies, or oval grains with incisions at their middle, or rounded grains with or 
without perforations, or even rods with a series of rounded prominences on 
each side. A single Polian vesicle and madreporic canal. The anterior portion 
of the interradial pieces of the calcareous ring is rounded and head-like. 
Cuvierian organs well developed. Anus stellate owing to five groups of small 
papillae, five papillae in each. 
Holothuria argus {Bohadschia), Jseger, 1833 ; Semper, 1868. 
Habitat . — Celebes (Jaeger), Society Islands (Ludwig), Navigator Islands (Semper), Timor, 
AVaygeou and Padang at Sumatra (Ludwig). 
(Mus. Holm.) One specimen from the Fiji Islands. Length, 125 mm. Colour — 
ventral surface uniformly brown ; dorsal surface dark olivaceous, here and there 
lighter, with numerous large almost black, sharply marked circles. Often two or 
more circles are united so as to form irregular figures. The circles are always 
surrounded by a whitish space, measuring about 5 mm. in diameter, and their centre 
where the papillie issue is darker than the rest of the space enclosed within them. 
Though these circles are mainly collected along the sides of the body and on 
the dorsal ambulacra, they are to be found also in the interambulacra, 
consequently no distinct longitudinal series are visible. The ventral pedicels 
seem to be slightly more crowded and larger than the dorsal. In the middle 
of each “ circle ” an ambulacral appendage is situated, which has a conical form 
and bears a rudimentary terminal plate. The pedicels as well as the “ papdlEe ” 
are strengthened by supporting rods. The anus is not very distinctly stellate. 
So far as I can find, the differences between this species and the preceding are 
very unimportant and mainly confined to the colour and the calcareous ring, the 
latter being many times larger and very sohd in Holothuria marmorata. 
Holothuria vitiensis, Semper, 1868. 
Pedicels numerous, equally distributed all over the body. Colour — hght brown, 
darker at the base of the pedicels. Incomplete rosettes like those in the 
preceding forms. 
Habitat . — Nicobar Islands, Navigator Islands, Fiji Islands (Semper). 
(Mus. Holm.) Two individuals brought home from the Fiji Islands and New Britaiu ; 
the former is light greyish or yellowish-brown, with a few larger dark spots or 
