542 A DESCRIPTION OF THE EXTOZOA COLLECTED BY DR WILLEY 



CONSPECTUS DISPOSITIONIS SELACHIORUM ENTOZOORUM. 



Ordo : Cestoidea Rud. 

 1810. Eatozoorum (45), Vol. ii. P. ii. p. 3. 



SuBORDO : Paramecocotylea Diesing. 

 1850. Revision (22), p. 11. 



Fam. (a) Tetraphyllidae van Beneden. 

 1850. Recherches (7), p. 112. 



Caput bothriis quatuor sumrae versatilibus instructo. 



I. Bothria inermia Phyllobothridae. 



II. Bothria uncinulis armatis Phyllacanthina. 



III. Bothria proboscidibus terebratoriis armatis, in 



coUum retractilibus instructum Phyllorhynchidea. 



I. SuBFAM. Phyllobothridea van Beneden. 

 1850. Recherches (7), p. 113. 



A. Corpus dense aculeatum. 



1. Genus. Cylindrophorus Diesing. 



B. Corpus nudum. 

 (a) Bothriis quatuor pedicello contractili affixis. 



2. Genus. Anthobothrium van Beneden. Bothriis indivisis. 



3. Genus. Echeneibothriuvi van Ben. Bothriis transverse costatoplicatis. 



4. Genus. Orygmatohothrium Diesing. Bothriis quatuor, singulo acetabulis aux- 



iliaris instructo. 



(6) Bothria capiti adnata (Bothria sessilia). 



5. Genus. Tetrabothrium Rud. Bothriis indivisis; acet. auxil. nulla. 



6. Genus. Monorygma Diesing. Bothriis indivisis; acet. aux. instructis. 



7. Genus. Phyllobotfn~ium van Ben. Bothriis quatuor, marginibus laciniato- 



crispatis, singulo acet. aux. instructo. 



8. Genus. Trilocidaria Olsson. Bothriis quatuor, singula bothi-ia loculis ternis 



in triaiigulum dispositis. 



