394 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



Stephanos torn um casum (Linton, 1910) 



Hosts and Localities : Lutianus viridis (Val.) from Albemarle 



Island, Galapagos 



Lutianus j or dani (Gilbert) ? f rom Secas 

 Islands, Mexico 



Lutianus novemfasciatus (Gill) ? from 



Tangola Tangola, Mexico 

 Location : Intestine 



Number : One specimen from each of the above hosts 



These specimens agreed in all details with S. casum. Identification is 

 based on body form, sucker ratio, 36 oral spines, anterior extent of the vit- 

 ellaria, location of gonads, extent of cirrus sac, and egg size. 



This species is common at Tortugas, Florida, in Lutianus analis and 

 L. griseus as well as occurring in other hosts. It has been reported from 

 Sebastodes sp. from British Columbia by McFarlane (1936). The writer 

 (Manter, 1931) has reported it from Micropogon undulatus at Beaufort, 

 North Carolina, but this record is incorrect. The Beaufort specimens are 

 not S. casum. Yamaguti reports S. casum from Pagrosomus auratus, but, 

 since he states that 46 oral spines occur, his form may be another species. 



Stephanostomum multispinosum, new species 



(Plate41, figs. 77, 78) 



Hosts: Mycteroperca olfax (Jenyns) (type host) 

 Mycteroperca sp. (perhaps olfax) 



Location: Intestine 



Locality: Albemarle Island, Galapagos (type locality) 



Clarion Island, Mexico 

 Number : 2 specimens only were collected, one from Albemarle 



Island (in M. olfax), one from Clarion Island (in 



Mycteroperca sp.) 



The following specific diagnosis is based on these two specimens. 



SPECIFIC DIAGNOSIS OF STEPHANOSTOMUM MULTISPINOSUM 



Length 2.754 to 2.929; width 0.615 to 0.787; forebody 0.570 to 

 0.675 or a little less than i^ body length. Posttesticular distance 0.412 

 to 0.427 or about 14 total body length. Oral sucker 0.180 to 0.187 in 

 diameter ; acetabulum 0.247 to 0.250 in diameter ; sucker ratio about 3 :4. 

 Oral spines small, very numerous, in two rows, not sharply pointed ; 38 to 

 40 pairs or a total of approximately 80 (the number may be the same in 



