226 BULLETIN OF THE 



spaced on tlie side arm-plate. Two minute, short, rounded tentacle-scales on 

 the inner side of the tentacle-pores. Color in alcohol, pale brown. 

 Station 43, 339 fathoms, 2 specimens. 



Amphiura lunaris sp. nov. 



Plate II. Figs. 31-33. 



Special Marks. — Disk-scales swollen. Three arm-spines. One or two 

 minute mouth-papilloe at outer corner of mouth-slit and two at apex of jaw. 



Description of an Individual (Station 29). Diameter of disk 4 mm. Lenj^th 

 of arm 17 mm. Width of arm close to disk .7 mm. One (sometimes two)" 

 small, rounded, scale-like mouth-papillae on either side, near juncture of first 

 under arm-plate and side mouth-shields, with two a little larger at the apex of 

 jaw. Above may be seen the long scale of the first mouth-tentacle. Mouth- 

 shields small, broader than long, with sharp angles at the lateral corners, outer 

 edge rounded, and an angle within. Side mouth-shields longer than broad, 

 wider without than within, where they just meet. Under arm-plates longer 

 than wide, pentagonal, with a well-marked angle inward ; midway out on the 

 arm the plates become long, triangular, with an angle inward. Side arm- 

 plates large and flaring, barely meeting below and above near base of arm. 

 Upper arm-plates swollen, of a transverse oval shape. Disk round and flat, 

 covered with small, swollen, overlapping scales ; those in the centre being a 

 little the largest. Radial shields flat pear-seed shape, with the peak inward, 

 just touching without, separated within by a wedge of two or three minute 

 scales. On the under surface the interbrachial space is covered with much 

 iiner scaling than that above. Genital slits long, extending from the outer 

 corner of the mouth-shield to margin. Three short, stout, tapering, pointed 

 arm-spines, the upper and under being often a little shorter than the middle 

 one. One minute flat tentacle-scale on the inner side of the pore. Color in 

 alcohol, white. 



Station 29. 955 fathoms, 2 specimens. 



Amphiura duplicata Ltm. 



Amphiura duplicata, 111. Catal. Mus. Comp. Zool. No. VIII. Pt. II. p. 19, PI. V. 

 Fig. 78. 



Station 2, 800 fathoms, 1 specimen (young, var.). Station 17, 320 fathoms, 

 1 specimen. Station 19, 310 fathoms, 2 specimens. Station 20, 220 fathoms, 

 ] specimen. Station 33, 1568 fathoms, 2 specime^is. Station 44, 539 fathoms, 

 1 specimen. 



Some specimens show a certain amount of variation ; especially the division 

 of the first under arm-plate is sometimes not distinct, and perhaps does not exist. 



Amphiura grandisquama Lym. 



Amphiura grandiaquama, Ikill. Mus. ("onip. Zoiil. Vol. I. No. 10, p. 334. 1869. 

 Station 5, 152-229 fathoms, 2 Bpccimens. 



