ACTINOPODOrS HOLOTHUEIOIDEA. 127 



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

 young of StlcJiopiis japonicus, and that the large tables occasionally 

 found are remnants from still earlier stages in whicli 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. This undoubtedly represents 

 the Cuvierian organ and agrees well with Selenka's description 

 of the same in //. subcUtiva. 



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 that H. lineata, H. peregrina and H. insignis 

 should be united Avith //. pardalh ; but also, the great authority 

 of Ludwig to the contrary notwithstanding, that //. suhclitiva should 

 be included in that species, as Theel, Sluiter and Bedfoed have 



