Revision der Cephaloeofyleen. Abtheilung;: Paramecorotyleen. <CÖ 1 



in triangulum dtspositis , instructo. Corpus antrorsum filiforme, 

 retrorsuin increscens, articulis margine postico in utroque latere 

 processibus triangularibus quatuor instructis. Aperturae genitalium 

 marginales. Lungit. 3 — 4" latit. >/ 3 — i / 2 ,'". 



Onchobothrium verticillatum Rud. — Dies. Syst. Helm. I. 606. 



Bothriocephalus verticillatus Creplin: in Troseh. Arch. i849. I. 73. 



Acanthobothi'ium verticillatum Beneden: in Bullet. Acad. Belgique XVI. 

 II. 279. 



Calliobotlirium verticillatum Beneden: in Mem. Acad. Belgique XXV. 

 138 et 192. Tab. XII. 



Onchobothrium (Calliobotlirium) verticillatum Dieslng: in Sitzungsb. 

 der kais Akad. XIII. 1854. 585. — Molin: ibid. XXX. (1858) 135. 

 XXXIII. (1858) 292 et XXXVIII (1859) 10. - Idem in Denkschr. 

 XIX. 239. Tab. VI. 3. 



Tetrabothrium verticillatum Wagener : in Nov. Act. Nat. Cur. XXIV. 

 Suppl. 85. Tab. XXII. 274 et 275. 



Habitaculo in Systemafe Helminthnm exposito adde : 

 Hexanchus griseus: in intestinis crassis (Otto). — Mustelus 

 vulgaris (Beneden et Wagen er). — Galeus Canis. — Sqaa- 

 tinä Angelas: vario anni tempore, haud raro, Ostendae (Beneden). 

 — Rajo Balis. — Mustelus plebejus Decenibri — M. equestris: 

 Majo: in intestinis crassis, Patavii (Mol in). 



Species quoad genus in familia Tetrabothriorum dubia. 



Tetrabothriuui Gerrardii BAIRD. 



Caput magnum tetragonum, botbriis quatuor cruciatim oppo- 

 silis subcircularibtis magnis, marginibus contiguis, singulo Costa .. . *) 

 Os . . . Collum nulluni. Corpus dcpressum augustum, articulis 

 supremis angwstissimis, posterioribus quadrangularibus. Aperturae 

 genitalium Longit. fragmenti 18", latit. capit. 3 / 4 '". 



Tetrabothrium Gerrardii Baird: in Proceed. Zool. Soc. London 1860. 

 448 et in Ann. nat. hist. 3 ser. VIT. (1861) 230. 



Habitaculum. Boa Constrictor : ex America meridionali, in 

 intestinis (Ger rar d). 



l ) „Each of them larg-e, round antl having 011 one side a strong ridge" Baird 1. c. 



