no. 2073. HOLOTHURIANS FROM NORTHWEST PACIFIC— OHSHIMA. 221 



Family SYNALLACTID^ Ludwig. 

 Genus SYNALLACTES Ludwig. 



1. SYNALLACTES DISCOIDALIS Mitsukuri. 



Synallactes discoidalis Mitsukuri, Actinopodous Holothurioidea, 1912, pp. 18-21, 

 text-fig. 3. 



Station 5091. Four specimens. 

 Habitat. — Various stations in Sagami Sea (Mitsukuri, 1912); south 

 of Joga Shima, Sagami Sea. 



2. SYNALLACTES ISHIKAWAI Mitsukuri. 



Synallactes isliihawai Mitsukuri, Actinopodous Holothurioidea, 1912, pp. 21-23, 



text-fig. 4. 



Station 5046. One specimen. 

 Station 5048. Four specimens. 

 Station 5091. Sixteen specimens. 

 Station 5092. Twenty- two specimens. 

 Station 5094. One specimen. 

 Habitat. — Sagami Bay (Mitsukuri, 1912); off Ojika Peninsula; 

 south of Joga Shima, Sagami Sea. 



3. SYNALLACTES NOZAWAI Mitsukuri. 



Synallactes nozawai Mitsukuri, Actinopodous Holothurioidea, 1912, pp. 23-25, 

 text-fig. 5. 



Station 4788. Two specimens. 



Station 4789. Four specimens. 



Station 4790. One specimen. 



Station 4791. Five specimens. 



Station 4792. Ten specimens. 



Station 4812. Three specimens. 



Station 4813. Three specimens. 



Station 4982. Twelve specimens. 



Station 4983. Three specimens. 



Station 4993. Seventeen specimens. 



Station 4994. Eleven specimens. 



Station 5029. One specimen. 

 The species established on a unique specimen is thus represented 

 by 72 specimens in the collection. The largest individual is 290 mm. 

 in length. Color deep violet on dorsum, light brown or whitish on 

 ventrum, papillae of a lighter color, tentacles yellowish-brown, twenty 

 in number. Pedicels of ventrolateral ambulacra about 70 in each, 

 forming a zigzag row; those of the odd ambulacrum in two zigzag 

 rows, each consisting of about 60 pedicels. Papillae of dorsum ar- 

 ranged in six rows, of which the median two consist of 30 papillae 

 each, and the remaining four of 25 each. Quadriradiate tablelike 

 deposits are largest at base of papillae and pedicels, attaining the 



