SOME MONOGENETIC TREMATODES FROM THE 

 GALAPAGOS ISLANDS AND THE NEIGHBORING PACIFIC* 



(With Seven Plates) 



Frank G. Meserve 



University of Nebraska 



This paper is an account and description of new species of ecto- 

 parasitic trematodes found on marine fishes in the south Pacific in the 

 region of the Galapagos Islands. The animals were collected and 

 preserved by Professor H. W. Manter, who was a member of the 

 G. Allan Hancock Expedition to the Galapagos Islands in 1934. All 

 the specimens were collected in January, February, and early March. 

 In the preliminary report Manter (1934) states: 



Over 500 marine fish, representing approximately 100 species, were examined 

 for parasites. Approximately 100 species of trematodes were collected, 80 per cent 

 of the species of fish and 43 per cent of the individuals examined being infected. 

 Approximately 20 per cent of the trematodes collected were Monogenea. 



The writer wishes to extend acknowledgment and express sincere 

 thanks to Professor H. W. Manter, under whose direction these 

 studies were made. All descriptions were made from specimens col- 

 lected by him with the exception of type material of Protomicroco- 

 tyle which was made available through the courtesy of Doctor E. W. 

 Price. Particularly valuable in this research was the loan of books 

 and reprints from Professor Manter^s personal library. The writer is 

 also indebted to Professor T. J. Fitzpatrick of the University of 

 Nebraska for his valuable aid in securing periodicals and reprints 

 from other libraries. Special acknowledgment is given to Doctor 

 E. W. Price of the Bureau of Animal Husbandry, U. S. Depart- 

 ment of Agriculture, for the loan of type material of Protomicrocotyle 

 mirabile (MacCallum, 1918) from the United States National Mu- 

 seum. He also reviewed this paper and made some corrections before 

 it went to the publisher. Sincere gratitude is also expressed to Pro- 

 fessor D. D. Whitney of the University of Nebraska who co-operated 

 in many ways and expressed a keen and kindly interest throughout 

 these studies. 



* Studies from the Zoological Laboratories, University of Nebraska, No. 195. 



[31] 



