24 BULLETIN OF THE 



arm-plates moderately projecting, nearly meeting above and below. Upper 

 arm-plates somewhat broader than long, transverse oval, with a deep curve 

 within, and a gentler one without. Disk thick and round, covered with thin, 

 rather large, rounded scales, which are seldom overlapping, and often separated 

 from each other by much smaller ones. Radial shields small, quite narrow, 

 much wider without than within, where they form a sharp angle, widely sepa- 

 rated by a wedge of three or four scales. The interbrachial space on the under 

 surface is covered by fine scaling, which is often quite obscured near the mouth- 

 shields by skin. Four equal, rather long, stout, and bluntly pointed arm- 

 spines. Large round tentacle-pores, but no scales. Color in alcohol, pale 

 gray. : 



Station, Balfour Bay, Kerguelen Isl., 20 - 60 fathoms, 1 specimen. 



Amphiura lanceolata sp. nov. 



Plate XI. Figs. 305-307. 



Special Marks. — Disk nearly or quite naked below. Two small lentacle- 

 scales. Radial shields long and narrow. Five slender, tapering arm-spines. 

 Upper arm-plates narrow. Under arm-plates squarish shield-shaped. Outer 

 mouth-papilla spiniform. 



Descriiotion of an Individual (Station 169). — Diameter of disk 4 mm. Arms 

 long and slender, about .7 mm. wide at the base. One slender, sharply pointed 

 mouth-papilla on each side of the mouth-angle, and a pair, short and much 

 rounded, at the apex. Mouth-shield small, thick, nearly oval. Side mouth- 

 shields three-sided, large and thick, as broad as long, curving round the inner 

 angles of the mouth-shield, but not meeting within. Under arm-plates nar- 

 row, longer than wide, pentagonal in shape, with an obtuse, or truncated angle 

 inward, outer edge nearly straight, and re-entering curves on the lateral sides. 

 Side arm-plates not prominent, nearly meeting above and below. Upper arm- 

 plates much rounded triangular, with angle inward. Disk flat, with deep con- 

 strictions in the interbrachial spaces. The scaling of upper surface of disk is 

 rounded and overlapping, and is much coarser in the centre, where also the six 

 primary plates may be distinguished : near the margin there are from 8 to 10 scales 

 in the length of 1 mm. Radial shields long and narrow, sharply pointed within ; 

 joined without, where the ends are much rounded, and separated within by a 

 wedge of five or six scales. Interbrachial space on the imder surface naked, or 

 with scattered, scarcely discernible scales. Five rather long, slender, cylindri- 

 cal, tapering, equal arm-spines about .6 mm. long. Two small rounded tentacle- 

 scales, one on the under arm-plate, and one on the side arm-plate. Color in 

 alcohol, pale gray. 



Station 169, 700 fathoms, 1 specimen. 



