696 
Proceedings of the Royal Society 
Station 6, 530 fathoms. One specimen. 
Station 7, 530 fathoms. Nine specimens. 
All these individuals differ from the typical form described by 
Diiben and Koren in their small size, the largest being only about 
15 mm. in length, and 10 mm. in breadth, and some other unimportant 
differences also exist. The pedicels being scattered over the whole 
body, seem to be more numerous along the three ventral ambulacra, 
forming there, more or less conspicuous rows. Pedicels with a few 
small arcuate spicula, and a small irregular terminal plate. Tentacles 
with larger and smaller, straight or arcuate spicula, the ends of which 
are enlarged and perforated. Anus with fine, small, elongated, per- 
forated plates resembling teeth. 
Stichopus (?) tizardi , nov. 
Station 6, 530 fathoms. Two rather incomplete specimens, and 
some fragments. 
Station 4, 555 fathoms. Some fragments. 
In consequence of the fragmentary condition of the specimens 
which have been at our disposal, it has been quite impossible to 
obtain an exact idea of their form, or to fix the genus to which they 
belong. The viscera having been ejected it could not be ascertained 
whether respiratory organs were present or not. The bottle in which 
the specimens were stored contained also the posterior part of an 
intestine with two respiratory trees, and it seems probable that these 
organs belong to the larger specimen. As they bear some resemblance 
to Stichopus I propose, for the present at least, to refer them to that 
genus. 
Body elongated, the length of the larger specimen being about 
130 mm. Bivium with some small retractile processes arranged in a 
row around its foremost part, and with a few larger ones scattered on 
the back. Trivium with small retractile pedicels. It is impossible to 
state how the processes and pedicels are arranged on the larger 
specimen, but the fragments plainly show that the bivium is provided 
with tubercles or processes all round the body, and that the pedicels 
are disposed in rows on the bivium. Mouth anterior ventral ; anus 
posterior, terminal, subdorsal. Tentacles twenty of almost equal size, 
their terminal part rather large, with some retractile processes. 
Integument very thick and soft, with two kinds of calcareous deposits ; 
small G-shaped spicula ; and other bodies representing the form of a 
