S 2 



IlIROSHI OIISIIIMA : 



Okinawa Island ; collected by me on dead coral reef, Apr. 7, 1901 

 (No. 1657). 9 specimens from Nishino-omote, Tanegashima, Satsuma ; 

 S. Ikeda coll., Jan. 4, 1905 (No. 1658). 1 specimen from Satsukawa, 

 Amami-Oshima ; MlTSUKURl and YASUDA coll., Mar. 31, 1901 

 (No. 1659). 



"Size. — 6.5x1.9 cm. (a large one in lot no. 1657); 2.8x1.4cm., 

 3.1 x 1.7 cm., 2.25 x 1.3 cm. (small ones in lot no. 1657). 



" Shape. — -Spindle-shaped, tapering towards both ends. 



" Color. — -Uniformly brown in alcohol. In one specimen some 

 large patches on the body. In life I have observed a purple tinge 

 on the animal, but can not remember exactly how this was caused. 



" Pedicels. — Scattered irregularly all over the body in ambulacra 

 as well as in interambulacra. In most specimens they are more 

 crowded on ventral than on dorsal surface. In some, longitudinal 

 arrangement of pedicels is recognizable, especially towards the posterior 

 end. The ventral ambulacra seem to possess three or four rows of 

 pedicels each, leaving narrow interambulacral spaces free of pedicels. 



" Tentacles.- — Fifteen in number ; in one specimen ten large and 

 five small, in another eleven large and four small. 



" Calcareous ring. — Both radialia and interradialia made up of 

 numerous small pieces. Radialia anteriorly with three notches, 

 posteriorly with two prolongations made up of eight or more small 

 pieces joined together. Interradialia pointed anteriorly, each wedging 

 itself between the posterior prolongations of two adjoining radialia, 

 consisting of several small pieces. Hind ends of posterior radial 

 prolongations continuous with corresponding ends of adjoining radialia. 



" Retractor muscles thick, short, attached to body-wall at about 

 I the body length from the anterior end of body. 



" Polian vesicle one. Stone-canal probably one. 



" Calcareous deposits. — None in any part (the neck portion not 

 excepted) of the body-wall of most specimens. In some (at least in 

 one young specimen of 2.25x1.3 cm.) there are found tables in 



