34 BULLETIN OF THE 



Station 128, off Bahia, Brazil, 1,275 fiithoms, 1 specimen. 

 This eccentric species might almost as well go with Ophiactis, 



AMPHILEPIS Ljn. 

 Amphilepis patens sp. nov. 



Plate XII. Figs. 338-340. 



Special Marks. — Disk flat, round and smooth. Mouth-angle large with 

 three wide mouth-pap illa3 on each side. Second pair of mouth-tentacles en- 

 circled by hard parts of the mouth. 



Description of an Individual. — Diameter of disk, 11 mm. Width of arm 

 near disk, 2 mm. Mouth-papilloe broad and irregular ; on either side of the 

 large prominent mouth-angle, at the outer corner, are two more or less closely 

 joined ; and, at the apex, a larger pair which, through the gap between them, 

 show the small lowest tooth. Mouth-shields rather small, rounded, broader 

 than long, often with a little peak inward ; length to breadth, 1 :1.2. Side 

 mouth-shields short and wide ; narrower within, where they barely meet. 

 Under arm-plates, rather small, as broad as long, shield-shaped, with a gently 

 curved outer side, lateral sides a little re-enteringly curved, and an obtuse 

 angle within. Side arm-plates wide, with a knob-like spine-crest, meeting 

 fully above and nearly or quite below. Upper arm-plates transverse oval, 

 twice as wide as long, separated by the side arm-plates. Disk round and flat, 

 but not thin ; covered above and below with rounded, overlapping, flat, rather 

 large, very thin, translucent scales, with indistinct outlines ; above they are of 

 pretty even size, except a marginal row of larger, each of which is .7 mm. long ; 

 below they are much finer ; about 3 in the length of 1 mm. Radial shields 

 large, of a rhomboidal form, except that the outer side is rectangular, much 

 longer than wide, strongly diverging, with the outer ends nearly touching, but 

 separated within by a broad wedge of numerous scales ; length to breadth, 

 3 : 1.2. Three stout, short, cylindrical, tapering, blunt arm-spines ; lengths to 

 that of an under arm-plate, 1.1, 1.2, 1.3 : .8. Tentacle-pores large, with one 

 minute scale on lateral side of under arm-plate. The roots of the second pair 

 of mouth-tentacles come low down, and thus seem framed by the surrounding 

 hard parts. Color in alcohol, pale gray. 



Station 299, 2,160 fathoms, 1 specimen. 



Amphilepis papyracea sp. nov. 



Plate XVI. Figs. 439-431. 



Special Marks. — Disk thin and flat, with thin, fine scales. Three tapering, 

 rather slender arm-spines, a little longer than an arm-joint. No tentacle-scale. 

 "Radial shields nearly or quite separated" their entire length. 



Description of an Individual (Station 198). — Diameter of disk 9 mm. 



