T^EXIAP^!. 91 



b. Tetrabothrii, Rudolphi. 



Head provided with four appendages inform of small ears or the 

 petals of a flower. 



11. BOTHRIOCEPHALUS MACROCEPHALUS. 



Teenia iininerina, Abildgaard, Dansk. Selsk. Skrivt. i. 58, 61 ; Vers, 



53, 56, t. 5, f. 2. 

 Rhytis immerina, Zeder, Natwg. 297, n. 9. 

 Bothriocephalus rnacrocephalus, Rudolphi, Hist. Nat. Entoz. ii. 2, 



61 ; Synopsis, 140 & 478, n. 16; Leuckart, Zool. Br. i. 36, t. 1, 



f. \t; Bremser, Icon. Helminth, t. 13, f. 12, 13; Dujardin, Hist. 



Nat. Entoz. 619. 

 Tetrabothriu.ru macrocephalum, Diesing, Syst. Helminth, i. 599. 



Hah. Intestines of the Red-throated Diver, Colymbus septentrio- 

 nalis. 



From the collection of M. Siebold. 



12. Bothriocephalus cylindraceus. 



Bothriocephalus cylindraceus, Rudolphi, Synopsis Entoz. 140 & 

 478, n. 17 ; Dujardin, Hist. Nat. Helminth. 619. 



Bothriocephalus rnacrocephalus 1 Leuckart, Zool. Br. 65 ; Dujar- 

 din, 1. c. 



Tetrabothrium cylindraceum, Diesing, Syst. Helminth, i. 600. 



Hah. Intestines of the common Gull, Larus canus. 

 From the collection of M. Siebold. (Fragments only.) 



13. Bothriocephalus auriculatus. 



Bothriocephalus auriculatus, Rudolphi, Synopsis Entoz. 141 <fc479, 

 n. 18; Bremser, Icon. Helminth, t. 13, f. 14-19; Dujardin, Hist. 

 Nat. Helminth. 620. 



Bothriocephalus flos, Leuckart, Zool. Br. i. 34, t. 1, f. 8-11, t. 2, 39 ; 

 Schmalz, Tab. Anat. Entoz. t. 4, f. 8 & 13 1 



Hob. Intestines of the Weasel, Mustela vulgaris. 



From the collection of M. Siebold. 



* Specimen without the Head. 



14. Bothriocephalus tetrapterus, Siebold. 



Hab. Intestines of the common Seal, Callocephalus vitulinus. 



