MUSEUM OF COMPARATIVE ZOOLOGY. 241 



and but slightly swollen, scarcely meeting below near base of arm, ami sepa- 

 rated above by four-sided upper arm-plates, which are as broad as long, and 

 have the outer side curved, and the laterals straight. Disk round, smooth, and 

 somewhat swollen, covered by skin, through which the scaling of the upper 

 surface is only vaguely indicated. In the lower interbrachial spaces the scales 

 are plainly indicated ; they are thin, rounded, pretty even, and about three in 

 the length of 2 mm. When the specimen is dry the scales are of course more 

 distinct. Radial shields small, irregularly three-sided; widely separated, except 

 at their outer ends, which overhang the arm. Along the edge of the genital 

 opening, whose scale is completely obscured, runs a line of minute, sharp 

 papillae, which stops at the disk margin and does not pass upwards to form 

 an arm-comb. Three wide, flattened, slightly rough arm-spines, whereof the 

 uppermost is longer than a joint, the middle one as long as a joint, and the 

 lowest one shortest and somewhat tapering. Each mouth-tentacle is sur- 

 rounded by about ten small, bead-like, close-set scales ; the next pore has six, 

 and those beyond two, which stand on the side arm-plate. Color in alcohol, 

 pale gray ; of living animal, bright orange ( Verrill). 



Station 312, 39° 50' 45" X., 70° 11' W., 466 fathoms. Station 306, 41° 32' 

 50" X., 65° 55' W., 524 fathoms, 2 specimens. 



A young one, with a disk of 4 mm., had more slender arm-spines, the back 

 scaling less indistinct, and the under arm-plates narrower and more widely 

 separated. 



This species is nearest 0. flagellata, but differs in having shorter arm-spines, 

 and in wanting an arm-comb. 



Ophioglypha affinis ? 

 Station 344, 40° 1' X., 70° 5S' W. 



Ophioglypha confragosa Ltm. 

 Station 312, 39° 50' 45" X., 70° 11' W. Young. 



Ophioglypha Sarsii Ltm. 



Station 346, 40° 25' 35" X., 71° 10' 30" W., 44 fathoms. Station 332, 

 35° 45' 30" X., 74° 48' W., 263 fathoms. Station 344, 40° 1' X.. 7<> 5* W.. 

 129 fathoms. Station 303, 41° 34' 30" N., 65° 54' 30" W., 306 fathoms, 



Ophioglypha lepida Ltk. 



Station 228, St. Vincent, 788 fathoms. Station 307, 41° 89* 45" v 

 Hi" W., 980 fathoms. Barflett, Station 14. Grand Cayman Island, cos fath- 

 oms. Station 308, 41° 24' 45" N., 65° 35' 30"' W.. 1,148 fathoms. Rutlrtt, 

 Station 18, 18° 20' 30" X-, 87° 16' 40" W., 600 fathoms. Station 330, 



VOL. X. — NO. 6. 1(3 



