BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND. 95. N:O 19. ») 
ambulacra. Processes forming transverse rows, more or less di- 
stinet. Integument with crowded, irregularly rounded, perforated 
plates. 
Deima validum sp. nov. 
Plate II, Figs. 36—38. 
Body of an elliptic form, about once and a half as long as its 
greatest breadth. Pedicels eleven along each side of the ventral 
surface; the hindmost pair, behind the anus, minute. Processes 
of the lateral ambulacra of the trivimm seven, inflexible, and al- 
most as long as the greatest breadth of the body; behind the 
anus a rudimental, bipartite one. Processes of the bivium six 
along the left and eight along the right ambulacrum, resembling 
the preceding in size and shape. Integument very thick and 
hard, with two kinds of calcareous deposits: very small spicula 
of various shapes, and larger and smaller, irregularly rounded, per- 
forated erowded plates, covering one another completely or with 
their edges alone. 
Colour in alcohol, light gray. 
Length, abouth 165 mm. 
Breadth, about 95 mm. 
Station 246, 2050 fathoms, two specimens. 
The other specimen differs slightly from the above described, 
its rudimental process behind the anus being still smaller and 
not bipartite. The processes of the bivium are eight on the left 
ambulacrum, and seven on the right; the size of the processes 
is also a little different, the fourth on the left side being very 
small. 
Deima fastosum sp. nov. 
Plate I, Figs. 1—3. 
Body of more equal breadth throughout than in the prece- 
ding species, elongated, more than twice as long as broad, lar- 
gest a little behind its middle. Pedicels eleven along each side 
of the ventral surface; the hindmost pairs small. Processes of 
the lateral ambulacra of the trivium four, inflexible, and much 
longer than half the breadth of the body. Processes of the bi- 
vium four along each of its ambulacra, resembling the preceding 
in size and shape. Integument hard and brittle, with crowded, 
larger and smaller, irregularly rounded, perforated plates, cove- 
