150 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



plate tetragonal, wider within than distally; succeeding plates more 

 or less hexagonal, pentagonal, or tetragonal, with rounded corners, 

 more or less broadly in contact throughout. Side arm plates rather 

 small, those at base of arm separated from each other by areas of 

 naked skin; each plate carries four arm spines, of which the highest 

 and lowest are somewhat the longest and rather exceed the joint. 

 Tentacle pores large, protected by two rather large scales. Color 

 (dried from alcohol), pale gray, pale yellow, or nearly white. 



Localities. — Albatross station 3737, off Port Ileda, Honshu Island, 

 Japan, 161 to 167 fathoms, green mud, volcanic sand, IS specimens; 

 station 3738, ofl" Port Heda, Honshu Island, Japan, 167 fathoms, 

 stiff blue mud, 24 specimens; station 5069, Suruga Gulf, lat. 35° 3' 10" 

 N.; long. 138° 47' E., 108 to 131 fathoms, mud, sand, broken shells, 

 bottom temperature 55.8°, 3 specimens; station 5073, Suruga Gulf, 

 lat. 34° 46' N.; long. 138° 21' 50" E., 148 fathoms, gray mud, bottom 

 temperature 54.6°, 9 specimens; station 5094, Uraga Strait, lat. 35° 

 4' 42" N.; long. 139° 38' 20" E., 88 fathoms, black sand, broken 

 shells, bottom temperature 54.8°, 2 specimens. Bathymetrical range 

 88 to 167 fathoms. Temperature range 55.8° to 54.6°. Fifty-six 

 specimens. 



Type.— Cat. No. 25632, U.S.N.M., from station 5094. 



This is a very good series of specimens, ranging in disk diameter 

 from 4 to 14 mm. The smallest specimens do not have the lumps 

 on the disk scales, though the scales near the margin and in the inter- 

 brachial spaces below are somewhat rough; in a specimen 8 mm. 

 across the disk, the lumps are very well developed. These lumps are 

 a very characteristic species mark, and when taken in connection 

 with the oral papillae and arm plates and spines, they make it difficult 

 to confuse this species with any other. 



AMPHIURA MICRASPIS, new species." 



Disk 4 mm. in diameter; arms about 20 mm. long probably. Disk 

 covered by numerous small scales, of which the largest are near 

 center. Radial shields very small, well separated, two or three 

 times as long as broad. Upper arm plates somewhat hexagonal or 

 fan-shaped, about as wide as long, narrow proximally, in contact 

 with each other, at least on base of arm. Interbrachial spaces below 

 covered by a close coat of fine scales. Oral shields large, broadly 

 oval, about as wide as long. Adoral plates triangular, l.ying at sides 

 of oral shields. Oral papillae, two on a side, one thick and rounded 

 at apex of jaw, and one broad, flat, and fan-shaped, on adoral 

 plate. Genital slits short and wide. First under arm plate broadly 

 tetragonal, but very small; succeeding plates tetragonal, with 



« MiKpog, signifying small, and doTiic, signifying shield, in reference to the small 

 radial shields. 



