50 ILLINOIS BIOLOGICAL MONOGRAPHS [400 



3. The uterus is tubular — not reticular. 



4. The dorsal excretory duct is dorsolatral to the ventral. 



Two changes should be made in the diagnosis of the genus Citto- 

 taenia. It should be stated that the oviduct joins the ovary directly in 

 front of the median axis of the vitelline gland and that the uterus 

 crosses the excretory ducts dorsally only, or not at all. 



The diagnosis therefore becomes as follows : 



Anoplocephalinae, with segments broader than long. Two sets of 

 reproductive organs in each segment. Genital canals pass dorsal of 

 longitudinal excretory vessels and nerves. Interproglottidal glands 

 absent. Vagina ventral of cirrus pouch on both sides of the segment. 

 Oviduct joins ovary directly in front of the median axis of the vitelline 

 gland. Uterus either confined to the median field or crossing the excre- 

 tory ducts dorsally only. Development usually by simple anterior and 

 posterior outpocketing. Eggs with well developed pyriform apparatus 

 of ordinary type, or without pyriform apparatus. Adults in mammals 

 and birds. 



Type-species : Cittotaenia denticulate/ Rudolphi 1804. 

 The genus Cittotaenia includes the following species, most of which 

 are fairly well known : 



1. Marmotae-growp. Cirrus pouch pyriform, distinct. Dorsal 

 duct lateral or dorsal of ventral (no statement concerning C. bursaria. 



C. marmotae Braun C. praecocquis Stiles 



C. denticulata Rudolphi C. ctenoides Railliet 



( C. latissima Riehm C. diaphana Zschokke 



(0. goezei) C. zschokkei von Janicki 



C. bursaria von Linstow C. quadrata von Linstow 



2. Pectinata-groiip. Cirrus pouch much elongated, resembling 

 nozzle of a hose, and indistinct; becoming pyriform occasionally in old 

 proglottids. Dorsal excretory duct median to ventral. 



C. pectinata Goeze (in part) C. rhea Fuhrmann 

 C. variabilis Stiles C. psittacea Fuhrmann 



(C. mosaica Hall) C. avicolae Fuhrmann 



C. perplexa Stiles C. kuvaria Shipley 



COMPARATIVE STUDIES ON THE ANOPLOCEPHALIDAE 



Fuhrmann 's classification of the Cyclophyllidea (1907) which is 

 accepted here recognizes in the subfamily Anoplocephalinae the genera 

 Triplotaenia, Cittotaenia, Moniezia, Anoplocephala, Andrya, Bertiella, 

 Schizotaenia and Aporna. Each of these genera is well defined and 



