224 
THE VOYAGE OE H.M.S. CHALLENGEE. 
Holothuria sanctori, Delle Chiaje, 1823 and 1841 ; Grube, 1840. Holoiliuria tuhulosa, 
var. sanctori, Lamarck, 1840. 
Halitat . — Mediterranean Sea (Delle Chiaje, Grube, Ludwig). 
Von Marenzeller kindly placed in my hands an example of this species dredged at 
Naples. Length in contracted state, 45 mm. Colour dark brown, slightly 
lighter on the ventral surface, and with four more or less irregular rows of light 
brown or yellowish spots along the dorsal surface. The five ambulacra are 
indicated by low ridges. The ventral pedicels are not very closely placed, have 
distinct sucking-disks, and well-developed terminal plates surrounded by. 
bilaterally symmetrical, elongate, perforated plates, or even by irregularly 
perforated rods. So far as I can see, the dorsal appendages are of two kinds — 
pedicels smaller than the ventral, with well-marked sucking-disks and terminal 
plates surrounded by slightly curved rods mostly with none or a few holes ; and 
small conical papillae, running out apparently from low warts in four rows 
corresponding to the four yellowish spaces. These papillae have ' a very 
rudimentary terminal plate and numerous strongly curved, smooth or slightly 
spinous rods having the ends slightly enlarged and perforated. The buttons are 
of an oval or elongated form, smooth and provided with six to twelve or some- 
times fewer holes ; it is not very rare to find buttons which are more or less 
deformed, sometimes presenting themselves as perforated, elongate, hollow or 
compact ellipses. The tables are well developed, having the large rounded disk 
mostly spinous on the margin, and perforated by a large central hole and a 
circle of peripheral ones. The spires are composed of four rods and one 
transverse beam, and their annular top bears as many as twelve teeth. 
Holothuria pardalis, Selenka, 1867. 
Pedicels all over the body. Tables with a spinous disk and having the spire 
terminatmg in eight to ten teeth. Buttons more or less regularly formed, of 
the usual shape, but accumulated in circles or rings. 
Habitat . — Sandwich Islands and Zanzibar (Selenka), Navigator Islands and Port 
Mackay (Semper), Mozambique (Semper), Eed Sea (Semper, Ludwig), Nang- 
kauri (Ludwig), Glorioso Islands (Bell). 
(Mus. Holm.) One specimen from Nangkauri, presented by Professor Mobius. 
Length 110 mm. Colour in alcohol, light dirty brown. The tables have often 
their spinous disks small and annular and the spire slightly reduced. The buttons, 
collected in groups or circles, are often very asymmetrical, generally pierced with 
six or more holes ; sometimes only one side of them is developed, and they not 
unfrequently bear some indistinct elevations. The dorsal appendages are sup- 
ported by slightly curved almost smooth rods, with the ends slightly enlarged 
and perforated, and their terminal plates are small. The ventral pedicels 
have a large terminal plate and bilaterally symmetrical, perforated rod-like 
plates. 
