114 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 50. 



rays, it is not substantiated by his figures. It might refer to the dor- 

 sal ray, though this Avould be the unusual and unlikely comparison. 



Tribe CYLICOSTOMEAE Railliet 

 and Henry, 1912a. 



Synonytn. — Cylichnosio- 

 midae Looss, 1902; Cylico- 

 stominac Kailliet, 1915. 



Trihe diagnosis. — Strongy- 

 linae (p. 107) : Ventro- ventral 

 and latero-ventral raj^s close 

 together and parallel. Medio- 

 lateral and postero-lateral 

 raj^s not close together and 

 parallel. Dorsal and externo- 

 dorsal rays originate sepa- 



FlG. 110.— ACHEILOSTOM.V SIMP.SONI. DOR.SAL VIEW FlQ. 141.— ACHEILO-STOMA SIMPSONI. L.VTER.U-VIEW 



OF BURSA. Enlarged. After Leiper, 1911. of bursa. Enlarged. After Leiper, 1911. 



rately. The vulva is close to the anus and the uteri are conver- 

 gent. 



Type-germs. — CylicoatoTrvwrn Railliet, 1901. 



Genus EUCYATHOSTOMUM Molin, 1861a. 



Synonym. — Encyathostomum Molin, 1861a. 



Generic diagnosis. — Cylicostomeae (p. Ill) : Buccal capsule large, 

 with a wide anterior aperture furnished internally with a crown of 

 numerous, slender, acutely pointed processes, the corona radiata. 



