no. 2073. HOLOTHURIANS FROM NORTHWEST PACIFIC— OHSHIMA. 231 



furrow. Integument thin and translucent, gray in color, closely 

 covered with fine granules, chiefly foraminiferan shells. Tentacles 

 black, 20 in number. The animal is characterized by 18-20 conical 

 warts arranged along the sides of ventrum, with four or five curved 

 papillae at the tip, about 2 mm. long, with black tips. In each dorsal 

 ambulacrum run two rows of short, slender papillae, about 25 in num- 

 ber. Near the lateral margin of ventrum pedicels measuring 1 mm. 

 in length form a very sparse row. Scattered irregularly along the odd 

 ambulacrum are found very minute pedicels only 0.3 mm. long. 

 Dorsal and lateral papillae contain only a very small number of smooth 

 supporting rods, 80-100 /i in length (pi. 8, fig. 7c). Pedicels of ven- 

 trolateral ambulacra have imperfect end-plates about 100 jy. in diam- 

 eter, but contain no supporting rod. Rods in tentacles are richly 

 armed with spines. In genital tubes are scattered branching cal- 

 careous bodies, normally X-shaped, with a knob at the middle (fig. 

 7a, b) , 80-200 fi in length. Calcareous ring is of the usual form, each 

 segment often with minute teeth on the posterior margin. Polian 

 vesicle single, respiratory trees two. Genital tubes unbranched, 

 arranged in a row along each side of dorsal mesentery. 



The present species is perhaps identical with Meseres peripatus 

 Sluiter, which has rows of warts beset with 4-5 clawlike papillae. 

 But the presence of a distinct pygal furrow, of spicules in genital 

 tubes, and other differences in deposits appear to distinguish P. 

 unguiculatus from it and all other allied forms. 



Habitat. — Southwest of Shikoku; south of Totomi, Honshu. 



Type.— Cat. No. 34151, U.S.N.M. 



Genus CAPHEIRA Ludwig. 

 18. CAPHEIRA MOLLIS, new species. 

 Plate 9, figs. 16a, b. 



Station 4767. One specimen. 

 Body elongated oval, rounded posteriorly. Length about 140 mm., 

 width about 55 mm. Color dirty brown, tinged with yellow and 

 green. Integument thin and finely wrinkled like crepe, and highly 

 delicate, apt to break even at a slight touch. Along ventrolat- 

 eral ambulacra the body wall is slightly thickened. Tentacles 15, 

 more or less shield-shaped, provided with 5 rounded digits. Very 

 minute, pedicellike appendages, only 0.5-1 mm. long, are found 

 scattered over the body except on midventral radius. Deposits of 

 only one form, namely, triradiate tables, thickly overlapping one 

 another. Disk with a small, round, central hole and oval peripheral 

 ones, 6 to 12 in number (pi. 9, fig. 16a) ; diameter 107-220/t, mean 

 160/*. From the margin of the central hole arise throe pillars, 

 together making up a conical spire with always two crossbeams and a 

 three-knobbed apex (fig. 16b). Height of spire varies 120-130/*. 



