242 
THE VOYAGE OF H.M.S. CHALLENGEE. 
Station 244. — June 28, 1875 ; lat. 35° 22' N., long. 169° 53' E. ; depth, 2900 fathoms ; 
bottom temperature, 35°'3 ; red clay. Six specimens. The dorsal surface of the 
elongate, flattened body carries rather large conical warts. On the ventral surface, 
which is almost totally destroyed, I have observed some small cylindrical pedicels ; but 
the arrangement of these pedicels is unknown. The integument, which is of a whitish 
yellow colour, is strengthened by crowded deposits (compare PI. X. fig. 10) consisting of 
four slightly curved arms and a long spinous outwardly directed process, the length of 
which is about 0‘09 mm. ; the arms, which are slightly shorter, have the ends dilated and 
perforated. On the ventral surface these deposits seem to be slightly smaller, and some- 
times I have seen the ends of some of the arms connected with one another. The 
deposits bear some resemblance to those found in several Elasipoda, but, to judge from 
the external appearance, the specimen seems to be more nearly related to the 
Aspidochirotae. The tentacles and all the internal organs and a good deal of the body- 
wall are spoiled. 
The six specimens obtained at Station 244 are much smaller, only about 90 mm. 
long, and they are much better preserved than the former specimen. The body is flat 
and surrounded by a brim, on the margin of which papillae or processes are situated. 
Even the dorsal surface carries such scattered conical papillae. These papillae are 
broad at the base, as much as 5 or 6 mm. in diameter, and their tops are prolonged 
into a long, narrow, and slender end. So far as I can discover, the ventral surface is 
furnished with a simple irregular row of small pedicels along each side ; these pedicels 
appear to belong to the lateral ventral ambulacra, while the odd ambulacrum is devoid 
of them. The mouth is completely ventral in position, and surrounded by nineteen 
tentacles resembling those in the Aspidochirotse. The anus is dorsal. The calcareous 
deposits are like those above described, excepting that they are smaller and that they 
often have five arms instead of four. From the defective state of the specimens it is 
impossible to decide whether they belong to the Aspidochirotse or are Elasipods. 
Station 122. — September 10, 1873; lat. 9° 5' S. to 9° 10' S., long. 34° 50' W. to 
34° 53' W. ; depth, 32 to 400 fathoms ; red mud. Two specimens in such a deformed state 
that no closer examination is possible. The animals, being in possession of pedicels and 
respiratory-trees, but lacking retractors, seem to belong to the Aspidochirotse. So far as 
I can see, two bundles of short, simple genital tubes are present. A single Polian vesicle 
and a very narrow calcareous ring are to be found. The deposits of the body-wall are 
probably dissolved, but the skin is covered and pierced by an immense quantity of 
foreign materials. 
Station 211, — January 28, 1875; lat. 8° 0' N., long. 121° 42' E. ; depth, 2225 
fathoms; Ijottom temperature, 50°‘5 ; blue mud. A fragmentary specimen of an 
Elasipod. The deposits consist of four-armed spicules with the ends of the arms slightly 
enlarged, very spinous, and sometimes pierced by a hole. Each arm sends out one 
