104 PROF. A. DENDY AND MR. E. HINDLE : ADDITIONS TO 



colour in spite of the fact that they have been in spirit for more than ten 

 years. These tentacles are arranged inter-radially, one pair to each inter- 

 radius, and between the two which form the dorsal pair is situated the opening 

 of the genital duct. 



The inner ring of tentacles, arranged radially, exhibits a slight irregularity 

 which may be expressed by the accompanying diagram (fig. A). 



Fio-. A. 



Diagram to show the size and arrangement of tlie tentacles in Phyllophorus dearmatus. — 

 <7.^. = genital pore ; i= small tentacles of tlie inner ring ; i' = two larger tentacles of the 

 inner ring ; o = oral aperture, o.t. = large tentacles of the outer ring. 



It will be seen that on the right side the two tentacles of each inner pair 

 are unequal in size, the lower one enlarged, while ventrally and on the left 

 side they are equal. It is not likely, however, that this arrangement is 

 constant, for in the allied genus P seudocucumis there is considerable individual 

 variation in this respect, as described by Bedford in his description of the 

 Holothurians from Funafuti and Rotuma (P. Z. S. 1898, p. 844). 



The eight smaller tentacles of the inner ring are thickly tufted arboriform 

 structures each about 1 mm. in length. The two laro-er ones are each about 

 3 mm. long and resemble those of the outer ring in form. 



The anus is situated at the base of a small depression at the posterior 

 extremity of the body. It is surrounded by a circle of ten small papillae 

 which are probably modified tube-feet. 



Spicules are absent from the body-wall itself, but are present in the tube- 

 feet, at the end of each of which there is a large end-plate. These are slightly 

 convex perforated plates usually about 0-35 mm. in diameter (PL 13. fig. 20). 



The internal anatomy seems quite typical of the genus Plujlloplwrus (PL 12. 

 fig. 15). The buccal cavity leads through the mouth into a spacious pharynx 

 supported by a calcareous ring (PL 11. fig. 8) of ten plates, five radial and 

 five inter radial in position. The radial plates are each about 2 cms. long. 



