MUSEUM OF COMPARATIVE ZOOLOGY, 221 
have re-entering curves on their lateral sides, where are the tentacle-pores ; 
beyond these, they are broad, triangular, with the two inner sides curved. 
Side arm-plates thick and smooth, meeting below, beyond the third under arm- 
plate, separated above by the large, triangular upper arm-plates, which are 
obscured by the thick skin, but, on drying, are seen to be cracked in many 
irregular pieces, Disk thin, with constrictions between the arms, covered 
with a thick skin which obscures the thin, irregular, angular scaling, to be 
seen only when partly dry ; on the margin of the interbrachial space there is 
a semicircular plate, Radial shields large, longer than broad, of an angular 
oval shape, widely separated by the disk-scaling ; length to breadth 5 : 4, Geni- 
tal opening extending from the mouth-shield about two thirds of the way to 
the margin, and bordered on either side by a close-set row of angular granules. 
Two small, flat, rounded tentacle-scales on the interbrachial side of the tenta- 
cle-pores of the second and third under arm-plates ; those of the second being 
the larger. No arm-spines, except at tip of arms, where there are two, low 
down, and like minute papilla. Color in alcohol, pale yellow. 
Station 49, 118 fathoms, 12 + specimens, 
This curious species is of a brilliant orange-color when alive, It was brought 
up in large numbers from a bottom of soft mud. At the first glance it seems 
an Ophiomyca, but, when partly dry, the details of external structure appear, 
Ophioconis miliaria sp. nov. 
Plate IIL. Figs. 49- 51. 
Special Marks, — Seven or eight arm-spines, the upper ones as long as three 
arm-joints. Two tentacle-seales, 
Description of an Individual (off Havana) — Diameter of disk 7.5 mm. 
Length of arm about 35 mm. Width of arm close to disk, without spines, 
2.8 mm, There are ten or more short, pointed, close-set papille on each side 
of the mouth-angle, the four outer ones and that at apex of jaw being larger 
and more rounded. On removing the fine granulation which closely eovers 
the mouth-angle, the mouth-shield ean be seen, of a rounded heart-shape, with 
a sharp angle within. Side mouth-shields small, long and narrow, not quite 
meeting within. Under arm-plates overlapping, wider without than within, 
with outer edge curved, and deep re-entering curves on the lateral sides, where 
are the tentacle-scales. Side arm-plates small and thin, meeting neither above 
nor below. Upper arm-plates rounded, transverse diamond-shaped, with an ob- 
tuse angle within, and outer edge irregularly curved ; they are highly arched, 
forming a longitudinal ridge. Disk round and flat, covered above and below 
with a close, fine granulation, about 13 grains in the length of a mm. No 
radial shields to be distinguished beneath the granulation, Genital openings 
short, extending from the mouth-shield only about half-way to the margin of 
the disk, Arm-spines near disk seven or eight, long and slender, the three 
upper ones being about as long as three arm-joints, the four or five lower con- 
siderably shorter, Two short, flat, bluntly pointed tentacle-seales, of which 
