102 
deep red-purple. But as H. L. Clark States the young specimens 
of his "'Ophiocreas phanerum^' to be ”somewhat lighter", I do not 
think this colour difference sufficient for regarding this specimen 
as representing a separate species. At any rate, until more material 
shall be available, it may be regarded as identical with O. con- 
strictum. — It was taken East of North Cape, in a depth of 70 
fathoms. 
O. constrictum must then be expected to occur in the seas all 
round New Zealand as well as in the East Australian waters. 
2. Ophiocveas longipes n. sp. 
PI. III. 
Ophiocreas constrictus Farqh. F. J e f f r. Be 11. 1917. British Antarctic 
(’Terra Nova") Exp. 1910. Echinoderma. Zool. IV.i. p. 7. 
Diameter of disk 25 mm. Arms of unequal length, the longest 
ca. 600 mm, the shortest ca. 400 mm. Width of arm near disk 
6,5 mm, height 7 mm. Disk and arms covered with a rather thin, 
completely smooth skin, which forms some longitudinal folds on 
the arms. Radial ribs narrow, meeting in the centre of the disk. 
Mouthangles with 2—3 rounded grains adjoining the teeth; the 
number of these latter could not be ascertained, the mouth being 
tightly closed. Genital slits 5—6 mm long, deeply sunk, nearly 
parallel. Tentacle pores small, the first pair without papillæ; the 
following 4—7 pairs carry one papilla, beyond these there are two 
papillæ to each pore. One of the arms shows a somewhat abnormal 
arrangement of the tentacles on the second and third joint, and a 
corresponding abnormal arrangement of the papillæ. The inner 
papilla (or armspine) gradually becomes elongated and clubshaped, 
its length not exceeding 3,5 mm. The outer papilla is about V 2 — 
Vs that length, not clubshaped. The lateral plates join in the ventral 
midline, a very small, oval ventral plate generally lying in front 
of them (Fig. l.i); in some joints it may, however, be lacking. 
(The shape of the lateral and ventral plates discernible only on dis- 
solving the skin e. g. by means of hypochlorite of sodium). 
The single specimen was taken 25 miles off Three Kings Isl., 
in a depth of 300 fathoms. 
This species is, evidently, closely related to Ophiocreas sibogæ 
Koehler, from which it is distinguished through the grains on the 
