56 



ART. 2. — H. MATSUMOTO 



Astrocharis ijimai Matsumoto. 



Astrocliaris ijimai : Matsumoto, Proc. Acad. Nat. Sei. Philadelphia 

 1915, p. 54. 



Numerous specimens, clinging to a coral ; Misaki, Sagami Sea. 



Diameter of disk 4.5 mm. Length of arms 50 mm. Width 

 of arms at base 2.5 mm. 



Disk five-lobed, with deeply indented interbrachial borders, 

 with the lobes emarginate towards the arms, flat, sunken at the 

 central region, raised at the lobes, covered with very fine, smooth, 

 irregular scales, which are very closely set and partly imbricated. 



Fig. 16. Astrocharis ijimai. a. From above. x2. b. From below. xlO. 



Eadial shields naked, very small, triangular, with the apex turned 

 within, tuberculous when examined under the microscope. Inter- 

 braehial ventral surfaces forming very deep notches, exceedingly 

 narrowed by the very wide arm bases. Two genital slits, small, 

 parallel, nearly vertical. On either side of each lobe of the disk, 



