EEPOET ON THE HOLOTHUEIOIDEA. 
57 
Order II. PEDATA. 
Body of various shapes, provided with pedicels or papillae, the latter often situated 
on the top of larger or smaller protuberances. Tentacles dendroid or peltate. 
Eespiratory-trees present. 
Family Dendeochirota:. 
Subfamily Stichopoda. 
Genus Cucumaria, Blainville, 1834. 
Cucumaria Icevigata, Yerrill, 1876 (PI. III. fig. 5 ; PI. VI. fig. 13). 
Habitat . — Station 149b, Kerguelen Islands, January 17, 1874; lat. 49° 28' S., 
long. 70° 30' E.; off Eoyal Sound; depth, 25 fathoms; numerous individuals: January 
29, 1874; off Christmas Harbour; dej)th, 120, 105, and 45 fathoms; numerous indivi- 
duals. Station 151, February 7, 1874 ; lat. 52° 59' 30" S., long. 73° 33' 30" E., off Heard 
Island; depth, 75 fathoms; volcanic mud ; a single specimen. 
The specimens examined by me do not cpiite agree with the description given by 
Verrill, but, considering that the Challenger specimens were dredged in great numbers 
on the very same localities in which Verrill, Studer, and Smith state that Pentactella 
IcBvigata is “very common,” there seems to be not the least doubt of their identity. 
The body is fusiform, more or less elongated. The largest individuals, though 
contracted, have a length of as much as 115 mm. or more. The tentacles are almost 
without exception of ec[ual size ; ooly in a very few individuals are they unequal, some 
dorsal or ventral ones being smaller than the rest, and it is worthy of note that these 
smaller tentacles are not fixed in position, as is the case in the typical Cucumarice. 
The anus is destitute of any teeth. The Polian vesicles are three to five, rather long, 
but in some individuals only one vesicle of considerable size is visible, while the others 
are very rudimentary. The retractor muscles issue from the longitudinal muscular bands 
near the middle of the body or nearer its posterior end. The genital tubes are simple. 
The pedicels of the bivium and trivium are almost equally large, and arranged in a 
double alternating row along each ambulacrum. No pedicels are found on the inter- 
ambulacral spaces. In the smaller individuals the pedicels at the middle of the body 
are more scattered, so as to give the impression of being disposed in a single 
ziofzag row. 
O O 
According to Verrill, this species should be destitute of any calcareous ring, for 
(ZOOL. CHALL. EXP. — PART XXXIX. — 1885.) Q<1 8 
