[41] ALBATROSS EXPLORATIONS. 543 



Archaster Parelii Dlibeii & Koren. Fig. 37. 



B. rauge, 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 tenuispimis Diiben & Koren. Fig. 3S. • 



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). Eare. 

 Benthopecfen spinosus Verrill. 1884. 



B. range, 855 to 1,917 fathoms, 1883. Common; locally abundant. 

 Luidia elegans Perrier. 1876 (Verrill, 1880). Fig8.x39, a. 

 B. range, 53 to 192 fathoms (65 to 70 fathoms, 1883), Common ; some- 

 times abundant locally. 

 lAiidia clathrata (Say). 

 B. range,, shore to 25 fathoms, south of Cape Hatteras (15 to 19 fath- 

 oms, 1883). Southern; common in shallow water. 

 Poreellanaster cosruleus W. Thomson. Figs. 40, 41. 

 B. range, 906 to 1,917 fathoms, 1883. Frequent; sometimes abun- 

 dant. 



OPHIUROIDEA. 



Ophioglypha Sarsii (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 signafta 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 hullata 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 0. convexa, to which I at 

 first referred them. Other characters agree better with O. hullata. 

 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. 



