DR. T. S. COBBOLd's STNOPSTS DF THE DISTOMIBjE. 17 



4. DisTOMA CYLiNDRACEUM, Zeder. 



D. cylindraceum. Zeder, Rudolphi, Meyer, Erdl, Siebold, Dujardin, 

 Cobbold, Pagenstecher, Diesing, Revis. p. 4/. 



BracJtylcemus cylindraceus, Blanchard. 



Fasciola subclavata, Pallas. 



Planaria cylindrica, Goeze. 



Hab. Also very abundant in frogs. Originally noticed by Braun and 

 Zeder in Rana esculenta ; by Rudolphi, Dujardin, myself, and others 

 in R. temporaria ; in Dendrokyas viridis by Bremser ; in R. oxyrrhinus 

 by Siebold, and R. platyrrh'miis by Siebold and Pagenstecher. It 

 usually infests the lungs. 



5. DiSTOMA VARIEGATUM, Rudolphi. 



D. variegatum, Rudolphi, Creplin, Mehlis, Dujardin, Pagenstecher, Wa- 

 gener, Meissner, Cobbold, Leidy, Diesiug, Revis. p. 35, 



Brachylcemus vuriegatiis, Blanchard. 



Hab. This is somewhat less abundant in Batrachians than the fore- 

 going. Rudolphi, Creplin, Diesing, Pagenstecher, and others have 

 noticed it in Rana esculenta. Leidy has found it in R. pipiens. 



6. DisTOMA ENDOLOBUM, Dujardiu. 



D. endolobum, Dujardin, Pagenstecher, Diesing, Revis. p. 45. 



In statu larvae. 



Cercaria {Xiphidiocercuria) armata, Siebold. 



C. armata, Victor Carus, La Valette, Pagenstecher, Van Beneden (ex 

 pai-te), Diesing, Revis. der Cercarien, p. 15. 



Hab. Originally discovered by Dujardin in Rana esculenta and Salaman- 

 dra maculosa. Since found in the intestines of Rana temporaria by 

 Pagenstecher. 



The larvae have been found free in fresh water by Wagener ; in sporo- 

 cysts and also free in Planorbis corneus by Siebold and Steenstrup ; 

 in LymncEus stagnalis by Pagenstecher, Siebold, Steenstrup, and La 

 Valette ; by the last-named observer, also in Paludina impura. Van 

 Beneden, however, appears to consider his two kinds of Cercaria ar- 

 mata as producing D. clavigerum and B. retusum ! 



7. DiSTOMA TETRACYSTis, Gastaldi. 



C. tetrucystis, Biagio Gastaldi, Fihppi, Diesing, Revis. der Myzehninth. 

 p. 44. 



In statu larvae. 



Cercaria {Xiphidocerc.) microcotyla, Filippi. 



C. (Acanthocephala) microcotyla, Filippi, Moidinie, Wagener, Diesing, 

 Revis. der Cercarien, p. 17- 



Cere, pugnax. La Valette, Pagenstecher. 



Hab. Discovered by Gastaldi among the muscles of Runa esculenta, en- 

 closed in small cysts, in the month of August. At present known only 

 in an imperfectly developed state. 



The larvje have been found free and in sporocysts by Fihj)pi, La Va- 

 lette, and Pagenstecher, in Paludina achatina and Rana esculenta. 



LTNN. PROC. — ZOOLOGY. 2 



