104 CATALOGUE OF ENTOZOA. 
Polycephalus (sp.), Zeder, Naturg. 
Hydatis (sp.), Bose. 
“Cenurus, Rudolphi, Hist. Nat. Entoz.; Bremser; Schmalz; Cuv. 
hegn. An. iii. 272; Blainville, Lamk., Diesing. 
1. CmHNURUS CEREBRALIS. 
Leske, Von dem Drehen der Schafe und dem Blasendwurme, dec. 
Tenia vesicularis, Goez, Naturg. 248, t. 20 A, f. 1-5, t. 20 B, 
f. 6-8. 
Vermis vesicularis socialis, Bloch, Abhand. 25, n.3; Brera, Vorles, 
16, t. 2, £. 10-17. 
Hydatigena cerebralis, Batsch, Bandw. 84, n. 1, f. 34-36. 
Vesicaria socialis, Schrank, Verzeichn. 31, n. 98. 
Tenia cerebralis, Linneus, Syst. Nat. 3062, n. 21; Tab. Encyc. 
t. 40, f.1-8; Turton, Brit. Faun. 127, n. 22. 
Hydatis cerebralis, Bosc, Hist. Nat. Vers, i. 323. 
Polycephalus ovinus, Zeder, Naturg. 430, n. 1. 
Cznurus cerebralis, Rudolphi, Hist. Nat. Entoz. ii. 2, 243,n. 1, t. 11, 
f.3 A-E; Synopsis, 182; Bremser, Icon. Helm. t. 18, f. 1,2; 
Schmalz, Tab. Anat. Entoz. t. 1, f. 8-13; Deslongch. Enc. Méth. 
Vers, 186; Blainville, Dict. Sc. Nat. vii. 603, t. 44, f. 7; Lamk. 
An.S. Vert. iii. 155, 2nd ed. iii. 567 ; Dujardin, Hist. Nat. Helm. 
637; Cuv. Regn. An. Ed. Crochard, Zooph. t. 40, f.4; Diesing; 
Syst. Helminth. i. 485. 
Polycephalus cerebralis, Laennec, Mém. sur les Vers Vésiculaires, 81. 
Hab. The Brain of the Sheep, Ovis aries. 
From the collection of M. Siebold. 
The Cenwrus cerebralis is also believed by M. Siebold to be 
proved by him to be the young of a species of Tenia, assuming a 
vesicular form, and being unprovided with sexual organs. Ann. 
Se. Nat. 3rd ser. xvii.; Ann. & Mag. Nat. Hist., Dec. 1852, 433. 
. Doubtful Entozoa. 
I, SPHEARULARIA. 
Spherularia, Leon Dufour, Ann. Sc. Nat. 2nd ser. vii. 9, 1836; 
Nordmann, in Lamarck, An. 8S. Vert. 2nd ed. iii. 669 ; Diesing. 
_ 1. Spoa@rvparta Bomst. 
Spherularia bombi, Leon Dufour, 1. c. 9, t.1, A. £.3; Nordmann, 
1. ¢. 670; Diesing, Syst. Helminth. ii. 112. 
Hab. Abdomen of the common brown Bee, Bombus muscorum. 
From the collection of M. Siebold. 

