4i DR. T. S. COBBOLB's SYNOPSIS OF THE BISTOMID.E. 



N.Jilarina,Ynn Beneden, Mem. sur les Vers Intestinaux, p. 109, pi. 



xiii. figs. 1-12. 

 Hab. Infests the branchial cavity of Scicena aquila. 



Genus 12. Codonocephalus. {Diesing.) 



In the absence of any original examination of this Trematode, I am un- 

 wilhug to set aside Diesing's generic distinctions, but I find Wedl who has 

 recently contributed several careful papers on Entozoology, remarking in his 

 " Anatomische Beobachtungen iiber Trematoden," that, in his opinion, 

 this genus can scarcely be legitimately maintained. In a group of such 

 numerous and closely-allied forms as the Trematodes present, one is almost 

 necessitated to employ as generic, characters which have only a subgeneric 

 value ; yet, at the same time, it is essential to avoid as far as possible the 

 splitting up of groups. 



1. CoDONOCEPHALUS MUTABiLis, Diesing. 



C. mutabilis, Diesing, Revis. p. 19 ; B. Gastaldi. 



Holostoma urnigerum, Wedl. 



Amphistoma urnigerum, Rudolpbi, Westrumb, Creplin, Bremser, Du- 



jardin. 

 Hab. Found by Creplin, Bremser, and Wedl in Pelophylax (Rana) escu- 

 lentus. It lives enclosed in cysts occupying various parts of the body 

 of the host. 



Geuus 13. EusTEMMA. {Diesing.) 

 1. EusTEMMA Caryophyllum, Dicsiug. 

 E, Caryophyllum, Diesing, Revis. p. 19. 



Hab. This singular flower-shaped entozoon was discovered by Natterer 

 in the intestines of Falco pileatus in Brazil in May. 



Genus 14. Holostoma. (Solosfomum) Nitszch. 



A. In corpore avium. 



\. Holostoma variabile, Nitzsch. 



H. variabile, Nitzsch; Wedl; Diesing, Revis. p. 16. 



H. macrocephalum, Creplin, Dujardin. 



Amphistoma macrocepAaiMm,Rudolphi, Westrumb, Bremser, Bellingham. 



Fasciola Strigis, Gmelin. 



Festucaria Strigis, Schrank. 



Planaria teres poro simplici, Goeze. 



Strigia, sp. Abildgaard. 



Hab. Found by Abildgaard in Strix brachyotus ; by Rudolpbi in S. Bubo, 

 S. flammea, and S. otus ; in the last named also by Bremser ; by 

 Creplin in «S. nyctea ; by Otto in S. pygmcea ; it has also been found 

 in S. aluco, S. passerina, and S. Tengmaleni ; by Wedl in Ardea 

 cinerea ; by Bellingham in Faleo rufus and F. peregrinus ; by Froelich 

 in F. tinnunculus ; by Rudolpbi and Bremser in F. apivorus ; it has 

 also been procured from F. Buteo, F. Lagopus, F. cineraceus, F. albi- 

 cilla, F. gallicus, F. pennatus, F. ncevius, F. haliceetus, F. imperialis, 

 F. rujlpes, and F. cyaneus. 



