ACTINOPODOUS HOLOTHURIOIDEA. 1G3 



The original specimen of Selenka was only 5 cm. long. The 

 only other investigator who has examined this species is Lam- 

 PEKT, and he also gives 5 cm. as the average length of the spe- 

 cies. Now it is possible that the difference in the calcareous 

 deposits of this species and S. hoi'ren'< is due simply to a differ- 

 ence in age. The number of tentacles is not a wholly reliable 

 character. It is therefore possible that this species may prove to 

 be the same as S. liorrens or only a variety of it. But at pre- 

 sent, the differences are too great and leave no choice but to 

 describe this as a new species. An individual in lot No. 1312, 

 4 cm. long, does not show any large tables distributed at regular 

 intervals, nor any conical tables at the base of the pedicels. 



A Fierasfer is said to have come out of specimen No. 1342. 



I have pleasure in naming this species after the late Mr. 

 Hirota, a friend and pupil of mine, who spent some time explor- 

 ing the Ogasawara Islands and collected a set of the specimens 

 under consideration. Ilis imtimely death cut off a career of much 

 promise. 



38. Stichopus japonicus Selenka. 

 (PI. IV., figs. 32—44 ; textfig. 29). 



Stlchojjm japonicus Selexka 1867, p. 318, Taf. XVIII., Fig. 33-36. 

 —Semper 1867— '68, . p. 74.— v.M.uienzeller 1881, p. 136, Taf. V., 

 Fig. 11.— Lampert 1885, p. 104.— Theel, 1886a, pp. 160, 194, PI. 

 Vn., fig. 3.— LuDWiG 1887^ p. 1242.— Ltjdwig 1889— '92, p. 331.— Mi- 

 TSUKURi 1896, p. 408.— IMiTSUKUKi 1897", p. 31.— Ostergrex 1808, p. 134.— 

 Sluiteb 1901i, p. 142.— Ci^uiK 1902", p. 563. 



ndothnria armata Selenka 1867, p. 330, Taf. XVIII., Fig. 66.— Lam- 

 pert 1885, p. 91. 



Stichopus annalits ? Semper 1867 — '68, p. 75. — v. IMarenzeller 1881, 

 p. 121. 



