478 



HIROSHI OHSHIMA : 



Eight specimens. Off Misaki, Sagami Sea (Bishamon-gaké-Kimura 

 ippai). 80 hiro ( = ca. 60 fathoms). Matsumoto and Chiba coll. Jul. 

 21, 191 3. (Cat. no. 1844). 



The largest specimen measures 36 mm. by 3.5 mm. 



Dendy and Hindle's statement that the sigmoid hooks in CJiiro- 

 dota gemmifera are present constantly in pairs, was probably founded 

 on observations on specimens with half-dissolved deposits. In a speci- 

 men of the present species (no. 1800), I have observed a similar 

 phenomenon in that every hook was longitudinally split by the action 

 of acidiferous alcohol. 



17. TrocJioclota dunedinensis (Parker). 



Chirodota dunedinensis Parker, On a New Holothurian, 188 1, p. 

 418. — Dendy, The Holothurians of New Zealand, 1897, pp. 26-28 ; 

 pi. Ill, figs. 1-8. 



Trochodota dnncdinensis Ludwig, Holothurien d. Hamburg. Ma- 

 galh. Sammeln, 1898, pp. 87-88. — Clark, The Apodous Holothurians, 

 1907, p. 124. 



One specimen. Off Misaki, Sagami Sea (Bishamon-gaké-Kimura 

 ippai). 80 hiro ( = ca. 60 fathoms). Matsumoto and Chiba coll. Jul. 

 21, 191 3. (Cat. no. 1846). 



Length 30 mm., diameter 3 mm. Color white. Tentacles ten, 

 each with four pairs of digits. Wheels confine J to the three dorsal 

 interradii and thinly scattered; diameter 75-130 /i. Sigmoid hooks 

 95-130 n long. In tentacles delicate rods are profusely found; they 

 are 45-70 y. long, shaped like an elongated C, and are provided with 

 6-10 short processes along the convex side. Ciliated funnels not 

 found. Genital tube undivided, one on each side. 



The specimen differs from the New Zealand form in that the 

 wheels are much smaller and the genital tube is not divided. The 



1) Jour. Linn. Soc. London (Zool.), vol. XXX, no. 196, 1907, p. 113; pl. XIV, figs. 

 30 b, c. 



