EEPOET ON THE HOLOTHTJRIOIDEA. 
200 
Holothuria intestinalis, Ascaniiis and Eathke, 1767 ; Diiben and Koren, 1844. Thyo- 
nidkiin sccibriim, 1868 (according to 0. Sars, 1871). Holothuria mollis, 
Sars, 1835. 
Pedicels alone. The tables are very regularly formed, consisting of a circular disk 
with smooth though undulated margin, and pierced with a large central hole 
surrounded hy a simple or double circle of smaller peripheric holes ; the spire 
is built up of four rods and one transverse beam, and terminates in sixteen or 
more teeth. 
Habitat. — Scandina\da from the Sound to Pinmark (Diiben and Koren, Danielssen 
and Koren, Mobius and Biitschli, Ludwig, Sars), White Sea (Jarzynsky), 
British Islands (Porbes and Goodsir). 
(Mus. Holm.) A great number of specimens from different localities of Scandinavia. 
I am inclined to regard all the ambulacral appendages as pedicels. They 
are cylindrical or conico-cylindrical, with sucking-disks and terminal plates, but 
devoid of supporting rods. Along the sides of the body they are longest, 7 to 
8 mm ., but decrease towards the middle of the back in a more or less obvious 
manner. On the ventral surface, on the contrary, the pedicels are scattered and 
very minute, nearly inconspicuous, and reduced, apparently, to a disk with distinct 
terminal plate. To judge from the description of Diiben and Koren, they must 
have confounded the dorsal and ventral surfaces. 
Holothuria magellani, Ludwdg, 1883. 
Habitat . — Strait of Magellan (Ludwig). 
This species is doubtless very nearly related to the preceding one, and it seems almost 
impossible to point out any distinguishing character of importance. According 
to Ludwig, the odd ambulacrum is almost devoid of pedicels, and the dorsal 
surface carries thinly scattered small “ papillte,” while the lateral ventral 
ambulacra have a 'double row of well-developed pedicels. 
D. Deposits — tables in a higher or lower state of development, in company with simple 
or branched rods or fenestrated more or less irregular plates. 
I. Tables very much transformed, devoid of disks, and with a long irregular spire of a 
more uncommon shape. 
Holothuria rjr (Iff ei, Semper, 1868. 
Ventral pedicels in three distinct longitudinal series. Dorsal papillos large, scattered. 
Deposits — besides tables, rosettes and irregularly branched, plate-like bodies. 
Tentacles twenty-four to twenty-five. 
Habitat . — Philippine Islands, Molucca Islands, and Fiji Islands (Semper), Timor 
(Ludwig). 
The description of the tables and the figures given by Semper are not fully compre- 
hensible. The species is characterised by having more than twenty tentacles. 
(ZOOL. CHALL. EXP. — PART XXXIX, — 1886.) Qfi 
