ACTINOPODOUS HOLOTHUEIOIDEA. 127 



H. pardalh, when young, has smooth-margined tables as in the 

 young of Stichopus japonlcu>^, and that the largo tables occasionally 

 found are remnants from still earlier stages in which the 

 tables were generally of that size and had a tall spire with two 

 or more cross-beams. 



In the species, supporting rods are present in ambulacral 

 appendages in the shape of bent rods having the ends slightly 

 enlarged and perforated (/, g). 



Polian vesicle mostly one, in one specimen two (No. 1225) ; 

 quite long, being about 3.5 cm. long in a specimen of 8 x 2 cm. 

 Stone-canal dorsal, small, single and free, ending in an oblong 

 end. A diligent search failed to reveal a second attached stone- 

 canal. In every specimen which I searched for Cuvierian organs, 

 there was a bundle of very short tubes at the bifurcation of the 

 respiratory tree. In an individual of 3 x 2 cm., the bundle 

 formed a yellowish oval mass 4 mm. in length and 3 mm. in 

 width, and consisted of a large number of minute tubes 0.08 mm, 

 in diameter and 2 mm. in length. Tliis undoubtedly represents 

 the Cuvierian organ and agrees well with Selenka's description 

 of the same in //. stibcUtiva. 



Calcareous ring very narrow ; only 1 mm. high in a specimen 

 8x2 cm. Reproductive organs are placed far back : at about 

 the middle of the body or even behind that point. 



The examination of these specimens shows that this is a 

 species exhibiting a very wide range of variation in color, in 

 ambulacral appendages, in calcareous deposits, etc. There can 

 not only be no doubt tliat //. lincata, H. pcrcgrinct and //. insignis 

 should be united with //. pardalU ; but also, the great authority 

 of LuDwiG to the contrary notwithstanding, that //, suhditica should 

 be included in that species, as Tuj:el, Sluiter and Bepfokd have 



