THE NEMATODE FAMILY GNATHOSTOMID^. 289 



•spicules are ratlier slender. Their tips (PL YII. fig. 28) are 

 smooth and rather blunt. 



The vagina (text-figs. 35, 36) passes into a voluminous uterine 

 sac. 



Specific Diagnosis. 



EcHiNOCEPHALUS MCLTIDENTATUS Baylis and Lane. 



Head-bulb with 11 to 13 rows of large hooks, each row contain- 

 ing about 100. Dorsal and ventral lobes of lips bear 8 or more 

 teeth each. 



Table YI. — Hosts and Distribution of the Species of Eclihiocepludus. 



Species. 



Host. 



Localit}^ 



Recorder. 



jEJ. unclnatus (adult) 

 (immature) 



(larva) 



Tvygon hrucca. 

 Trygon pastinaca. 



JlijUohatis nienliofi. 



JBaListes Jiiitis. 



Batistes stellatus. 



Margaritifera marga- 

 ritrfera. [M. vulgaris.'] 

 Finna sp. 



Adriatic. 



m 



Ceylon. 



Molin (1858). 



V. Linstovv, in Shipley 



& Hornell (1904).' 

 Baylis & Lane 



(present paper). 

 Shipley & Hornell 



Baylis & Lane 

 (present paper). 



IE. spinosissimits 



Ilyliohatis aquila. 

 Trygon hrucco. 



Trygon lualga. 

 TJrogijmmis asperrimus 



Ceylon. 

 Adriatic. 



Ceylon. 



V. Linstow, in Shipley 

 & Hornell (1905). 



Molin (1858) 

 [recorded as 

 IS. iDicinafus']. 



Baylis & Lane 

 (present paper). 





Urogt/mnus asperrimus. ' "'evlon. 







JE. multklentatns ... 



TJrogymnus asperrimus. Cey lon. 





E. striatiis ScijUium sj). Peru. 



„ (?) Aetobati narinari. Lovaltv Is. 



Monticelli (1889). 

 Shipley (1900). 



5. EcHiNOCEPHALUS STRIATUS Monticelli, 1889. 



Monticelli (1889, p. 71). 



? Shipley (1900, p. 560; text-fig. E). 



The name E. striatus was given by Monticelli to some specimens 

 from the stomach of Scyllium sp., from Payta, Peru. Sub- 

 .sequently Shipley doubtfully referred to the same species some 



