MUSEUM OF COMPARATIVE ZOOLOGY. 23 



Amphiura iris sp. nov. 



Plate XI. Figs. 30S - 304. 



Special Marks. — Disk scaled above and below ; one large oval tentacle- 

 scale : four long arm-spines, the uppermost and lowest longest. 



Description of an Individual (Station 236). — Diameter of disk 5 mm. 

 Width of arm without spines 1.2 mm. One short, stout, somewhat flattened 

 blunt papilla on each side of the mouth-angle, and a pair, similar, but some- 

 what smaller, at its apex. The large and broad scales of the first pair of tenta- 

 cles are low down and conspicuous. Mouth-shields of a very wide heart-shape, 

 much wider than long, with a rounded angle within. Side mouth-shields 

 thick, long triangular, tapering inward where they do not meet. First under 

 arm-plate usually large ; of a diamond shape, with its angles more or less trun- 

 cated ; the plates beyond are longer than wide, with outer side curved and 

 widest, lateral sides re-enteringly curved and a truncated angle within. Side 

 arm-plates stout and rather prominent, meeting neither above nor below. 

 Upper arm-plates fan-shaped, with inner angle more or less rounded, or trun- 

 cated, and outer side gently curved. Disk covered above and below, with mod- 

 erately coarse, crowded, irregular scales, those of the interbrachial spaces being 

 more elongated, and those on the under surface somewhat obscured by skin. 

 Toward the centre of the disk there are 7 or 8 scales in the length of 1 mm. 

 Radial shields much longer than wide, slightly curved, somewhat swollen, 

 tapering at both ends and widest in the middle ; separated their whole length 

 by a row of three or four large scales ; length to breadth, 2 : .6. Four long, 

 cylindrical, tapering arm-spines, whereof the uppermost and lowest are long- 

 est, and equal to If arm-joints. One large tentacle-scale. Color in alcohol, 

 pale gray. 



Station 236, 420-775 fathoms, 1 specimen. 



Amphiura tomentosa sp. nov. 



Plate XI. Figs. 299 - 301. 



Special Maries. — Disk scaled on both sides with rather large, spaced scales ; 

 those below somewhat obscured by thick skin ; four tapering, equal arm-spines ; 

 no tentacle-scale. 



Description of an Individual (Station, Balfour Bay, Kerguelen Isl.), — Diam- 

 eter of disk 6.5 mm. Width of arm close to disk, without spines, 1 mm. One 

 very small short mouth-papilla, often obscured by skin, on each side of the 

 mouth-angle, and a pair, larger and rounded, at the apex. Mouth-shields irregu- 

 lar, small, rounded triangular, with a small peak inward. Side mouth-shields 

 longer than broad, wider without than within, where they just meet ; both they 

 and the mouth-shields are somewhat obscured by skin. Under arm-plates 

 narrow, longer than broad, pentagonal, with a "blunt angle inward, small re- 

 entering curves on the lateral sides, and outer lateral corners rounded. Side 



