MONOGRAPH OF JAPANESE OPHIUROroEA, 



75 



Astrocladus annulatus Matsumoto. 



Astrodadus annulatus : Matsumoto, Proc. Acad. Nat. Sei., 1915, p. 56. 



One specimen ; off Misaki, Sagami Sea. 



Diameter of disk 22 mm. 



Distance from the centre of the disk to the 



interbrachial margin 8.5 mm. 



From the outer end of the oral sht to the 



1'^- bifurcation 11mm. 



From the disk margin to the l"'" bifurca- 

 tion 1.5 mm. 



From the 1'*' bifurcation to the 2°'^- .... 7 mm. 



From the 2"'- to the 3"''' 8.5 mm.-6.5 mm. 



I 

 From the S'"'^- to the 4'^- 5.5 mm.-9 mm. 



I 

 From the 4"'- to the 5'^ 9 mm.-4 mm. 



1 

 From the 5"' to the 6"'- 4 mm.-9 mm. 



From the 6"'- to the 7* 10 mm.-4 mm. 



From the 7"'- to the 8"' 4 mm.-7.5 mm. 



From the 8'"- to the 9"" 7 mm.-3.5 mm. 



From the 9''- to the 10*"- 3.5 mm.-8 mm. 



From the 10*'^- to the IT"- 8 mm.-3.5 mm. 



From the 11"^- to the 12"^- 3 mm. -7 mm. 



From the 12'"- to the 13'"- 9 mm.-3 mm. 



I 

 From the 13'''- to the 14'"- .. .. . . 2.5 mm.-5 mm. 



From the 14*'' to the 15* • 5 mm.-2.5 mm. 



From the 15''- to the 16*^ 2 mm.-3.5 mm. 



From the le*'' to the 17*^- 3.5 mm.-2 mm. 



From the 17"' to the 18*''- 1.5 mm.-3.5 mm. 



From the 18*''- to the 19*- 3 mm.-1.5 mm. 



From the 19"'' to the end 1 mm.-2 mm. 



