72 



K. MITRUKUrj : STUDIES ON 



Holotknrla pdchcJla Selexka 1807, p. 329, Taf. XVIIL, Fi-. 61—62. 

 — SEMrER 1867— '68, pp. 89—90, 278.— Ss^rrEi^ 1869, p. 120.— Haacke 

 1880, p. 46.— V. Marexzelt.er 1881, p. 139.— Ludwig 1883, p. 171.— Théel 

 1886«, p. 212.— Sluitek 1887, p. 187.— Sluiter 1895, ]>. 77. 



Holothurla oÀnerascens Lampert 188Ô, p. 82.^ — Ludwig 1887a, p. 3. — 

 Bell 1887«, pp. 654—657, PI. XL., %. 2.— Ludwig ] 889— '92, p. 329.— 

 Lampert 1896, pp. 55— 56.— :Mit8ukuri 1896, p. 407.- Bedford 1899«, p. 

 54.— Ludwig 1899, p. 56L— Sluiter 19016, p. 9. 



Specimens examined : — 



Description : — Tentacles 20. Tlie ventral pedicels are mncli 

 more crowded than the papillae of the dorsum and tlie sides, 

 from which they are qnite distinct. Calcareous de]X)sits : — the 

 spire of the tables is supported l)v a reduced, ?dmost annular 

 disk and carries twelve teeth on the top. Below the tables lie 

 numerous slightly curved rods 0.1 mm, long and 0.01 mm. broad, 

 which are distinguished by a linely granulated surface. In the 

 walls of the pedicels, no other calcareous structures occur. Polian 

 vesicles 2 — 3 (1 — 7, Se^^iper). Long stone-canals 8 — 10 (1, 3, 8 — 

 10, Semper), in a bundle on the left of the mesentery. Cuvierian 

 organs present according to several authors (v. Martens, La:\ipert, 

 Sluiter). Color grevish brown, often with two rows of large 



