BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND. 5. N:O 19. 11 
Letmogone violacea sp. nov. 
Plate I, Figs, 14 a—l14 d. 
Body elongated, about twice and a half as long as its grea- 
test breadth. Tentacles of almost equal size; their terminal part 
rather large, almost discoidal, destitute of visible processes. Pe- 
dicels eleven along the left side of the ventral surface; and twelve 
along the right one, rather long and large; the posterior small. 
Processes of the bivium very slender and flexible, in one indi- 
vidual twenty, in another twenty-three along each of the ambu- 
lacra; the longest process about as long as the greatest breadth 
of the body; the middle of the back, a little behind the ten- 
tacles, with a small process. Integument very thin and rough 
with three sorts of numerous calcareous deposits: spinous bodies, 
cruciform or in the form of an x, with four curved arms, the 
distance betwen the ends of the arms being about 0,18 mm.; 
large wheels, frequently with eight spokes, about 0,2 mm. in 
diameter; and small wheels, sometimes with thirteen spokes, about 
0,068 mm. in diameter. Both sorts of wheels resemble those 
of the preceding species; between the large and small wheels 
there are many forms, varying much in size and shape. 
Colour in alcohol, gray violet. Ends of the tentacles light 
yellowish brown. 
Length, about 90 mm. 
Breadth, about 35 mm. 
Station 164, 950 fathoms, two specimens. 
Ilyod&emon !) gen. nov. 
Back highly convex; ventral surface nearly fiat. Mouth an- 
terior, almost ventral; anus posterior, terminal, subdorsal. ”Ten- 
tacles fifteen. The lateral ambulacra of the trivium with large, 
not retractile pedicels, apparently disposed in a double row all 
along each side of the ventral surface. The odd ambulacrum 
naked. Bivium with a crowded series of very numerous, com- 
pletely retractile, slender, rather long processes, disposed in three 
or four irregular close-set rows all along each of its ambulacra. 
Integument with numerous, wheel-shaped plates and dichoto- 
mously branched bodies. 
1) vs, o0ze, duiuwv, spirit. 
