120 



AET. 2. — H. MATSUMOTO 



Fig. SO. Ophiacantha rhachophora. x 18. a. From above, h. From below. 

 0. Side view of two arm joints near disk. 



directed in the same direction with the others, so that in such a 

 case the oral papillae appear as shown in Claek's figure. 



OpJiiacantJia bisquamata Matsumoto. 



Ophiacantha hisquamata : Matsumoto, Proc. Acad. Nat. Sei. Plüladel- 

 phia LXVn, 1915, p. 62. 



