96 PKOF. A. DENDY AND MK. E. HINDLE : ADDITIONS TO 



and the manuscript was accordingly withheld from publication. Subse- 

 quently, however, one of us found this curious Holothurian in quantity 

 at Kaikoura and was able to study it in the fresh condition, when it became 

 evident that spicules are really absent and that the genus Rhahdomolgus, so 

 long discredited by systematists, must be revived. Professor Ludwig * has 

 lately (1905) come to the same conclusion from the study of specimens 

 of Keferstein's original species [Rhahdomolgus nd>er), rediscovered on the 

 coast of Heligoland. 



We cannot conclude this brief introduction without expressing our thanks 

 to several friends in New Zealand for their great kindness in helping to get 

 together the collection, especially Professor W. B. Benham, Professor H. B. 

 Kirk, Mr. A. Hamilton, and Mr. Henry Suter. 



Stichopus 3I0LLIS, Hnttoii, sp. (Plate 12. fig. 12.) 



1872. Holothiiria mollis, Untton, Cat. Echinoderm. N.Z. p. 15. 



1879. Holothuria (? Stichopus) mollis, Hutton, Trans. N.Z. Inst. vol. xi. p. 308. 



1879. Holothuria Robsoni, Hutton, Trans. N.Z. Inst. vol. vi. p. 308. 



1885. Holothuria viollis, Lampert, Die Seewalzen, p. 93. 



1885. Holothuria Rohsoni, Lampert, Die Seewalzen, p. 93. 



1886. Holothuria mollis, Theel, Challenger Reports, vol. xiv. p. 239. 

 1886. Holothuria rohsoni, Theel, Challenger Reports, vol. xiv. p. 239. 

 1886. Stichopus sordidus, Theel, Challenger Reports, vol. xiv. p 167. 

 1897. Stichopus mollis, Deudy, Jouru. Linn. Soc, Zool. vol. xxvi. p. 46. 

 1897. Holothuria Robsoni, Dendy, Journ. Linn. Soc, Zool. vol. xxvi. p. 48. 



1897. Sticliojn/s mollis, Whitelegge, Rec. Australian Museum, vol. iii. p. 50. 



1898. Stichopus mollis, Ludwig, Hamburger Magalhaen. Sammelreise, Holothurien, p. 7. 

 1906. Stichopus viollis, R. Perrier, Ann. Sc. Nat., Zool. 9^ ser. i. (1905) p. 83. 



Four specimens from Milford Sound, collected by Mr. D. Sutherland, 

 and one specimen from Otago, collected by Prof. Benham at a depth of 

 20 fathoms, occur in the collection. 



They vary in length from 7'0 cms. up to 13"4 cms. The smallest specimen 

 is very dark brown in colour ; it possesses a much thicker body-wall than the 

 other specimens, probably owing to its being in a state of contraction. 

 Three other specimens are brown in colour, but in addition have irregular, 

 dirty-white markings. The largest example is almost white and has a 

 remarkably thin body-wall, but, as it does not differ from S. mollis in 

 any other characters, we consider it merely a variety of this rather variable 

 species. 



The general integument of this species contains no other spicules but the 

 characteristic tables. The tube-feet and papillse, however, contain two or 

 three kinds of spicules. 



Each tube-foot is supported at its extremity by a slightly irregular 

 perforated end-plate, round which are arranged a number of perforated 

 bilateral plates. 



* Zooloffischer Anzeiger, Bd. xxviii. No. 12. 



