REPORT OF THE ECHINOIDEA—MORTENSEN Biz 
one, 83 mm. long, in fairly good condition; the smaller, 69 mm. long, 
badly broken on the oral side. 
Station 5582, Darval Bay, northwestern Borneo (lat. 4°20’ N., 
118°59’ E.) ; 1,629 meters; September 26, 1909. One young specimen, 
32 mm. long, and fragments of two larger ones. 
Station 5602, Gulf of Tomini, Celebes (lat. 0°22’ N., long. 132°03’ 
E.) ; 1,760 meters; November 14, 1909. One young specimen, very 
fragmentary. 
Station 5668, Macassar Strait (lat. 2°28’ §., long. 118°49’ E.) ; 
1,649 meters; December 29, 1909. Two badly broken specimens. 
Remarks.—The identification of these specimens is not quite beyond 
doubt. In the character of the petals they correspond very well with 
the illustrations given by Koehler, and the specimens in which the 
posterior end is sufficiently well preserved for ascertaining the char- 
acter of the subanal fasciole, viz, the two specimens from station 5468 
and the young specimen from station 5582, agree with Koehler’s 
description of the species in having this fasciole very broad and in 
having only three tube feet to each side within the fasciole. 
The two specimens from station 5468 are peculiar in that the labrum 
has only a very short but broad posterior prolongation, not nearly 
reaching to the middle of the adjoining first ambulacral plates, and 
carrying a few large tubercles in continuation of the tubercles of the 
sternum. In the specimens from station 5668 the posterior prolonga- 
tion of the labrum is narrower and longer, with no larger tubercles; 
the same is the case in the two smaller of the specimens from station 
5582, while the third resembles the specimens from station 5468 in the 
character of the labrum. It thus seems that the shape of the labrum 
varies to an unusual degree within this species. 
The pedicellariae, particularly the rostrate, likewise vary to a con- 
siderable degree. In the specimens from station 5668 a very coarse 
form, with short broad valves, occurs in the petals; it is covered with 
very dark skin and has no neck, so that one might be inclined to regard 
it as a globiferous pedicellaria, but, rostrate forms transitional to the 
more usual slender type exist in other specimens. Another form of 
rostrate pedicellaria with unusually narrow valves is found in these 
same specimens. Nothing quite like these forms of rostrate pedicel- 
lariae has been observed in any of the other specimens, but forms 
more like the common rostrate type are found. The tridentate 
pedicellariae are very faintly developed in these specimens from 
station 5668, but in the other specimens they are well developed and of 
various forms, corresponding to those figured by Koehler, op. cit., pl. 
20. Globiferous pedicellariae, with long and slender valves terminat- 
ing in two divergent teeth, as figured by Koehler, op cit., pl. 20, fig. 32, 
are found in the specimens from stations 5668 and 5582. Ophicepha- 
lous pedicellariae not observed. 
