13] PROTEOCEPHALIDAE — LA RUE 13 



Type species: Proteocephalus filicollis (Rudolphi) 

 Syn. : Proteocephalus ambiguus (Dujardin) 



(2) Choanoscolex La Rue 1911 



"With characters of family. Head conical with a fold of tissue at 

 the base partially covering suckers. No rostellum, no hooks, no spines. 

 Genital organs as in Proteocephalus. Habitat : In Siluridae. 



Type species: Choanoscolex abscisus (Riggenbach). 



(3) Corallobothrium Fritsch 1886 



With characters of family. Scolex with four suckers situated on 

 the flat anterior face of the head. Many irregular folds and lappets of 

 tissue about margin of anterior surface ; may enclose suckers as in a 

 corolla. No rostellum. No hooks nor spines. Neck broad, short. Habi- 

 tat : In Siluridae. 



Type species: Corallobothrium solidum Fritsch. 



(4) Crepidobothrium Monticelli 1899 



With characters of family. Head large, swollen, pyramidal, tetrag- 

 onal, unarmed. Suckers large, inversely cordate, posterior margin in- 

 terrupted and re-entrant into sucker cavity. Fifth sucker vestigial. 

 Genital apertures marginal, irregularly alternating. Vaginal opening 

 dorsal to cirrus pouch. Vagina anterior or posterior to cirrus-pouch. 

 Testes in two lateral fields anterior to ovary. Habitat: In Boidae, 

 South America. 



Type species: Crepidobothrium gerrardii (Baird) 



(5) Acanthotaenia von Linstow 1903 



With characters of family. Scolex rather small. With four rounded 

 suckers. Apex of head conical in which may be situated a vestigial fifth 

 sucker. No rostellum. Cuticula of head and anterior part of body cov- 

 ered with minute spines or bristles. Segmentation indistinct. No over- 

 lapping of segments. Testes in two lateral fields anterior to ovary. 

 Ovarian lobes may be branched. Vagina anterior or posterior to cirrus. 

 Habitat : In Varanidae and Hylidae. 



Type species : Acanthotaenia shipleyi von Linstow 



(6) Ophiotaenia La Rue 1911 



With characters of family. Head globose or somewhat tetragonal. 

 No rostellum. No hooks or spines. Suckers circular or oval, with mar- 

 gins entire. Fifth sucker vestigial. Neck usually long. Testes in two 

 long lateral fields anterior to ovary. Vagina anterior or posterior to 

 cirrus-pouch. Ovary bilobed, flattened, sometimes alate. Parenchyma 



