[41] ALBATROSS EXPLORATIONS. 543 
Archaster Parelii Diiben & Koren. Fig. 37. 
B. range, 225 to 1,608 fathoms (547 to 1,608 fathoms, 1883). Not rare, 
but always in small numbers. 
Archaster formosus Verrill. 1884. 
B. range, 1,467 to 1,608 fathoms, 1883. Not common. 
Archaster tenuispinus Diiben & Koren. Fig. 38. 
B. range, 368 to 1,731 fathoms (888 to 1,731 fathoms, 1883). Common; 
often abundant locally. 
Archaster sepitus Verrill. 1885. 
B. range, 368 to 858 fathoms (858 fathoms, 1883). Rare. 
Benthopecten spinosus Verrill. 1884. 
B. range, 855 to 1,917 fathoms, 1883. Common; locaily abundant. 
‘ Luidia elegans Perrier. 1876 (Verrill, 1880). Figs. 39, a. 
B. range, 53 to 192 fathoms (65 to 70 fathoms, 1883). Common; some- 
times abundant locally. 
LIvuidia clathrata (Say). 
B. range, shore to 25 fathoms, south of Cape Hatteras (15 to 19 fath- 
oms, 1883). Southern; common in shallow water. 
Porcellanaster ceruleus W. Thomson. Figs. 40, 41. 
B. range, 906 to 1,917 fathoms, 1883. Frequent; sometimes abun- 
dant. 
OPHIUROIDEA. 
Ophioglypha Sarsti (Liitk.) Lyman. 
B. range, 30 to 1,608 fathoms (65 to 1,608 fathoms, 1883). Common, 
widely diffused ; large and often very abundant at moderate depths 
in the course of the Arctic current, off Martha’s Vineyard. 
Ophioglypha signata Verrill. 1882. 
B. range, 65 to 640 fathoms, 1883. Common in moderate depths. 
Ophioglypha confragosa Lyman. 1878. 
B. range, 238 to 2,033 fathoms (2,033 fathoms, 1883). Not common. 
Ophioglypha bullata W. Thomson. 
B. range, 1,608 to 2,221 fathoms, 1883. Not rare; local. 
In respect to the large rounded scales of the disk, our larger speci- 
mens agree closely with the description of O. convera, to which I at 
first referred them. Other characters agree better with O. bullata. 
Ophioglypha lepida Lyman. 1878. Var. spinulosa Verrill. 1884. 
B. range, 888 to 1,497 fathoms, 1883. Extremely abundant in several 
localities. 
The disk is flat and thin; the scales thin, unequal, rather irregular in 
size, with curved margins; and there are small sharp spinules scattered 
over the disk, The arms are slender, and there is a single, longer, upper 
spine rather widely separated from the two lower and much smaller 
ones, close to the tentacle-scales. 
