OUR KNOWLEDGE OF NEW ZEALAND HOLOTHURIANS. 101 



attaching foreign particles to itself, for in all our examples it is covered with 

 sand. 



The original account of this form given by one of us has been supplemented 

 by both E,eiffen and Perrier, so that the anatomy of the species is now very 

 well known. 



The species must be extremely abundant off the New Brighton beach, 

 thongh seldom thrown up on the shore. On one occasion, however, after a 

 storm, innumerable specimens were cast up at high-water mark together with 

 immense quantities of other marine animals, as already described by one of 

 us. " Probably I should be correct in saying that there were millions of this 

 animal lying on the beach ; they lay in heaps and might have been collected 

 with a shovel." * They were associated with large numbers of Caudina 

 coriacea and burrowing lamellibranchs, and probably live buried in the sand, 

 out of reach of ordinary tidal influences. 



Phyllophorus longidentis, Hutton, sp. (Plate 13. figs. 18a-18<;i) 



1872. Thyone longidentis, Hiitton, Cat. Echinoderm. N.Z. p. 16. 



1872. Thyone caudata, Hutton, Cat. Echinoderm. N.Z. p. 16. 



1879. Pentadactyla longidentis, Hutton, Trans. N.Z. Insl. vol. xi. p. 307. 



1886. Thyonidium 7-ugosum, Th6el, Chall. Reports, vol. xiv. p. 95. 



1886. Thyone longidentis, Theel, Chall. Reports, vol. xiv. p. 141. 



1886. Thyonidium caudatum, Theel, Chall. Reports, vol. xiv. p. 147. 



1891. Phyllophonis caudatus, Lndwig, Bronn's Klass, u. Ordnung., Holotburoidea, p. 347. 



1891. Thyllophorus rugosus, Ludwig, Bronn's Klass. u. Ordnung., Holothuroidea, p. 347. 



1897. Phyllophorus longidentis, Dendy, Journ. Linn. See, Zool. vol. xxvi. p. 42. 



1898. Phyllophorus longidentis, Ludwig, Hamb. Magal. Sammelreise, Holothurien, p. 49. 

 1903. Thyonidium anatinum, R. Perrier, Bull. Mus. d'Hist. Nat. vol. ix. p. 142. 



1905. Phyllophorus anatinus, R. Perrier, Ann. Sc. Nat., Zool. 9^ ser. i. (1905) p. 112. 



Two examples of this species were obtained in Akaroa Harbour by 

 Mr. Henry Suter. 



Although these two specimens differ somewhat in external appearance, a 

 careful examination has convinced us that they belong to the same species. 



In the smaller specimen (length 1"8 cms., breadth 0*7 cm.) the body is 

 curved upwards at both ends, while in addition the tip of the tail is slightly 

 flexed towards the ventral surface. The ambulacral appendages are distributed 

 somewhat sparingly over the surface, but are concentrated along the radii, 

 especially towards the extremities. The small tail is without appendages. 



In the larger specimen (length 2*5 cms., breadth 1 cm.) the body is almost 

 straight and the tail is very obscure, apparently retracted. The ambulacral 

 appendages are more numerous and appear irregularly scattered over the 

 body. 



* Dendy, " Notes on a Remarkable Collection of Marine Animals lately found on the New 

 Brighton Beach, near Christchurch, New Zealand," Transactions of the New Zealand 

 Institute, vol. xxx. 1897, p. 320. 



