in CLASSIFICATION OF CESTODA 91 



a. A transverse uterus in middle part of median field ; head 2 mm. 



diameter . . . S. centnpunctata Riv. 



b. Two lateral uteri in each segment ; head less than 1 mm. in 



diameter . . . S. globipunctata Riv. 



III. Scolex almost invariably provided with hooks ; genital pores on left 



border of segment ; eggs with three shells but no cornua. Segments 

 broader than long ; posterior angles salient. HYMENOLEPIS Weinl. 



a. Scolex with a single series of 24-30 hooks, each 14-18/n long 



H. nana v. Sieb. H. murina Duj. 



b. Scolex very small, unarmed . . H. diminuta Rud. 



IV. Scolex provided with two elongated muscular pits. Body segmented ; 



three genital apertures in middle of ventral surface 



BOTHRIOCEPHALUS Rud. 



Body 2-20 metres in length . B. latus Brems. B. cri-statm Dav. 



(doubtful species). B. cordatus Leuck. B. mansoni Cobb. 



( = B. liguloides Leuck.) 



Classification of Cestodes. The following classification, 

 which, so far as the Taeniidae are concerned, follows that 

 employed by Eailliet, Blanchard, and most recent writers, in- 

 cludes only a few representative genera : 



1 . Fam. CESTODARIIDAE Mont. (MONOZOA Lang). 



Gen. Caryophyllaeus, Archiyetes, Gyrocotyle, Amphilina. 



2. Fam. BOTHRIOCEPHALIDAE. 



Sub-Fam. 1 . Bothriocephalinae. Gen. Bothriocephalus, Schistocephalu*, 



Triaenophorus ( = Tricuspidaria). 

 Sub-Fam. 2. Ligulinae. Gen. Ligula. 



Sub-Fam. 3. Solenophorinae. Gen. Solenophorus, Duthiersia. 

 Sub-Fam. 4. Diphyllinae. Gen. Echinobothrium. 



3. Fam. TETRARHYNCHIDAE. 



Gen. Tetrarhynchus. 



4. Fam. TETRAPHYLLIDAE. 



Sub-Fam. 1. Phyllobothrinae. Gen. Phyllobothrium, Echeneibothrium, 



etc. 

 Sub-Fam. 2. Phyllacanthinae. Gen. Calliobothrium, Anthobothrium, 



etc. 



5. Fam. TAENIIDAE. 



Sub-Fam. 1. Cystotaeninae. Gen. Taenia 8. str. 



Sub-Fam. 2. Anoplocephalinae. Gen. Moniezia, Thysanosoma, Stilesia, 



Anoplocephala. 

 Sub-Fam. 3. Cystoidotaeninae. Gen. Dipylidium, Hymenolepis, Drep- 



anidotaenia, Dicranotaenia, Echinocotyle, Davainea. 

 Sub-Fam. 4. Mesocestoidinae. Gen. Mesocestoides, Dithyridium. 

 Sub-Fam. 5. Ichthyotaeninae. Gen. Ichthyotaenia, Cffrallobothrium. 



