142 A. E. Verrill—Marine Fauna off the New England Coast. 
600 fathoms. According to Mr, Lyman, our specimens differ 
but slightly from the type. 
Color, in life, yellowish or grayish white. It is easily dis- 
tinguished by its rigid arms, with decidedly swollen joints; the 
conspicuously plated, rigid disk; and by the large, supplement- 
ary plate, outside the mouth-shields. 
Amphiura macilenta Verrill, sp. nov. 
A small species, with very long, slender arms, having three 
slender, acute arm-spines. Disk, in life, nearly round, often be- 
scales, forming a more or less evident rosette at the center ; 
lower side with more minute scales; radial shields long and 
narrow, wedge-shaped, the outer ends prominent and in contact, 
the inner ends separate a narrow wedge of small scales. 
Mouth-shields shield-shaped, with rounded corners, rather longer 
than wide, broadest in the middle, inner angle obtuse; side 
mouth-shields wide. Mouth-papille five on each side of each 
mouth-angle, unequal in size, mostly obtusely rounded; the 
arm-plates. Tentacle-scales two, minute, flat ; tentacles long 
and slender. Arm-spines three divergent, nearly equal, a little 
fathoms ; also taken sparingly at several other localities. 
is has been examined by Mr. Lyman, who does not recog- 
nize it as a described species. 
