no. 2073. HOLOTHURIAN8 FROM NORTHWEST PACIFIC— OHSHIMA. 265 



and have some holes in the extremities, measuring 240-440/* in length. 

 End plate weakly developed, only represented by branched rods. 

 Anal teeth well developed. Calcareous ring without posterior pro- 

 longations. Polian vesicle and stone-canal single. Respiratory 

 trees 2, with a few branches. Genital tubes unbranched. 



I thought at first that these specimens were the young of C. ecliinata 

 v. Marenzeller, which is quite common in Sagami Sea, since in a 

 young stage the deposits of its perisome do not show the characteristic 

 spine and knobs. But in the present species the plates are more 

 numerous than in C. ecliinata of corresponding age, the spinous plates 

 are absent from pedicels, and the end plates are less perfectly formed. 

 From C. capensis this species seems to differ in deposits. 



Habitat. — Sagami Sea. 



65. CUCUMARIA MOSAICA Kcehler and Vaney. 



Cucumaria mosaica Kcehler and Vaney, Description d'Holothuriea nouvelles, 

 1910, pp. 98-99, pi. 2, figs. 1-5. 



Station 5074. One specimen. 



Body about 21 mm. long, 5 mm. in diameter. Tentacles 10, midven- 

 tral pair very much smaller than the rest. The lenticular deposits com- 

 posed each of 3 or more layers of knobbed plates connected by means 

 of trabecule measure 180-450/i in diameter and 80/* in thickness. 

 Mingled with these large plates are found a few spinous tables with 

 two-pillared spire. Diameter of disk 63-130/*, height of spire 25-35/*. 

 Between these two sorts there are all stages of transitional forms. In 

 the introvert elliptic plates, 80-1 20/( long, with more or less rudimen- 

 tary spire are very abundant. There are found, besides these, com- 

 plicated rosettes near base of tentacles. In pedicels a weakly devel- 

 oped end plate without any regular, rounded margin is present, besides 

 the arched, modified tables described from the original specimen. 

 Supporting rods of tentacles are delicate or elegant rods, with a pair 

 of large holes at the middle and a second of minute ones. The large 

 lenticular bodies are totally absent near the anus, while the tablelike 

 ones are here abundant. Anus guarded with 5 simple perforated 

 plates. Polian vesicle single; stone-canal also single, with a two- 

 lobed, minute madreporite. Retractors weakly developed, inserted 

 to body wall at one-third the body length. Genital tubes unbranched 

 in two tufts. At the tip of each tube is found a needle-like spicule, 

 250-650/t long, with two minute holes near the middle. Respiratory 

 trees, 2, the right branch being very long. 



Kcehler and Vaney had only one eviscerated specimen, with which 

 the specimen before me agrees in every essential character; only the 

 lenticular bodies are more robust and knobbed, and the smaller plates 

 are provided with a spire. 



Habitat. — Persian Gulf (Kcehler and Vaney, 1910); Siirugn Bay. 



