no. 2073. HOLOTHURIANS FROM NORTHWEST PACIFIC— OHSH1MA. 285 



Station 5006. Ten fragments. 



Station 5007. Ten fragments. 



Station 5008. Eight fragments. 



Station 5009. Two fragments. 



Station 5018. Two complete specimens and five fragments. 



Station 5020. Two complete specimens and two fragments. 



Station 5021. Two complete specimens and two fragments. 



Station 5022. Four fragments. 



Station 5023. Eight fragments. 



Station 5026. Three fragments. 



Station 5029. One fragment. 



Station 5032. One fragment. 



Station 5033. One complete specimen and six fragments. 



Station 5043. Nine fragments. 



Station 5044. One complete specimen and four fragments. 



Station 5045. One fragment. 

 The largest specimen measures 235 mm. in length and 14 mm. in 

 diameter. Tentacles normally 12, but exceptionally 10, each carry- 

 ing 5-7, or even 9, pairs of digits. Wheel papillae up to 2 mm. in 

 diameter, forming a single row in the 3 dorsal interambulacra, but 

 often confined to the middorsal one only. Wheels vary in diameter 

 between 80 and 200//, with a mean of 145/*. Spokes vary exceptionally 

 from 4 to 9 in number. Very often there is a small triangular pore at 

 the center, in place of the "Mittelpfeiler." The irregular branching 

 rods measure 90-200/z in length, and may be totally absent in some 

 individuals. Polian vesicles 20 in number in one specimen. 



The original specimens are described by Edwards as having much 

 smaller wheels and rods than in those before me. There is, however, 

 no doubt as to their specific identity. 



Habitat. — Queen Charlotte Sound, off Fort Rupert, Vancouver 

 Island, British Columbia; Boca de Quadra, vicinity of Nana Bay, 

 Behm Canal, and junction of Clarence Strait and Behm Canal, south- 

 east Alaska (Edwards, 1907); off Cape Terpyeniya and south ends of 

 Sakhalin; off Rebun Island; Nemuro Strait; and off Hitaka, 

 Hokkaido. 



92. CHIRIDOTA DISCOLOR Eschscholtz. 



Chiridota discolor Eschscholtz, Zoologischer Atlas, 1829, pp. 12-13, pi. 10, fig. 2. — 



Clark, The Apodous Holothurians, 1907, pp. 26-28, 120. 

 Liosoma sitchxnse Brandt, Prodromus, 1835, p. 58. 



Unalaska. Five specimens. 



Nikolski, Umnak Island. Three specimens. 

 The largest specimen is 37 mm. long and 7 mm. across. Integu- 

 ment soft and muscular, gray in color with minute, reddish pigment 

 spots. Tentacles 12, digits 4-5 pairs. Deposits, wheels only; wheel 

 papillae in both dorsal and ventral interambulacra. Diameter of 



