THE SYNAPTID^E OF JAPAN. 



479 



dark spots observed by Parker inside the base of tentacles could not 

 be made out. None of the previous writers on New Zealand speci- 

 mens seem to have observed the deposits in tentacles. It may be 

 that the Japanese specimens represent a distinct species. 



18. Tvochodota rosea, sp. nov. 



Two specimens. Down off Nami-no-Uyé Temple (dead coral 

 reef), Napha, Okinawa, Liu-Kiu Islands. Mitsukuri coll. Apr. 8, 

 1901. (Cat. no. 1770). 



Length 30 mm., diameter 4 mm. Color in life pink. Tentacles 

 ten, each with three pairs of digits, which increase in length towards 

 the distal end. Wheels numerous, distributed all over the body, in 

 some parts so clustered as to overlap one another, but nowhere form- 

 ing wheel-papillae. They vary 37-105 fi in diameter. Sigmoid hooks 

 of the ordinary shape, generally 90 fi long though in some few individ- 

 uals the length ranged 80-95 ^ n the tentacles are found bent rods 

 of a shape exactly the same as in those of T. purpurea (Lesson)", 

 measuring 50-100 [i in length. Segment of calcareous ring 1 mm. by 

 0.4mm., narrowed in the middle. Polian vesicle one, stone-canal not 

 made out. Ciliated funnels in a thick zone along middorsal and the 

 left dorsal interradii. Genital tubes not divided. 



The present species is very close to T. purpurea, the only im- 

 portant difference from that species consisting in the much smaller size 

 of sigmoid hooks. 



19. Scoliodota japonica (v. Marenzeller). 



Chirodota japonica v. Marenzeller, Neue Holothurien von Japan 

 und China, 188 r. pp. 123-124. 



Scoliodota japonica Clark, The Apodous Holothurians, 1907, pp. 

 30, 125 ; pl. VII, fig. 5. — Ohshima, Synaptiden von Misaki, 191 3, pp. 

 259-262, textfigs. A-D; pl. VI, figs. 1-3. 



I) Ludwig, 1898, pl. III, fig. 43; or dark?, 1907, pl. VII, fig. 7. 



