214 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Figure \9.—Nesippus costalus? Wilson, 1924: a, cyst on fin of teleost host; b, dorsal view of 

 younger early encysted specimen; c, dorsal view of older early encysted specimen; d, dorsal 

 view of late encysted specimen; e, dorsal view of recently excysted specimen. 



thoracic leg-bearing segment irregular in younger specimen, regularly 

 concave in older. Third thoracic leg-bearing segment almost rectan- 

 gular in younger specimen though tapering slightly posteriorly ; greatest 

 width almost three times greatest length; posterior margin concave. 



