227] PROTEOCEPHALIDAE—LA RUE 227 



1898 

 1898 

 1908 

 1911 



OPHIOTAENIA TRIMERESURI (Parona) 

 [Figs. 106-108, 141, 142, 192, 193] 



Taenia trimeresuri Parona 1898:7-11 



Ichthyotaenia trimeresuri Luhe 1898 :652 



Ichthyotaenia trimeresuri Schwarz 1908 :33-35 



Ophiotaenia trimeresuri La Rue 1911 :481 



Specific Diagnosis : Characters of genus. Length up to 105 mm. 

 Maximum breadth 0.75-1.5 mm. Scolex unarmed, without rostellum, 

 broader than neck, breadth 0.75 mm. Suckers prominent, hemispherical, 

 muscular, 0.16-0.25 mm. in diameter, situated anteriorly. No fifth 

 sucker. Neck short, three times length of head, breadth 0.25-0.5 mm. 

 First proglottids broader than long. Mature proglottids quadrate or 

 longer than broad. Angles of proglottids not prominent. Strobilation 

 indistinct. 



Genital pore situated near middle of proglottid margin, irregularly 

 alternating in position. No genital papilla. Genital sinus if present 

 very shallow. Testes 100-108 in number, measuring 0.063 by 0.027 to 

 0.080 by 0.027 mm., situated in two fields not near vitellaria. All testes 

 anterior to ovary. Mass of coils of vas deferens not large. Ductus 

 ejaculatorius much coiled. Cirrus muscular. Many coils of ductus 

 ejaculatorius in base of protruded cirrus. Cirrus-pouch about 0.270- 

 0.330 mm. long by 0.136 mm. broad. Ratio of length of cirrus-pouch 

 to proglottid breadth 1 :4 or 2 :5. Vagina anterior or posterior to cirrus- 

 pouch, not crossing same. Lumen of vagina variable in size. Sphincter 

 vaginae present. Lobes of ovary flattened, elongated, narrow. Vitel- 

 line follicles small. Uterus when fully developed with 20-30 (?) lateral 

 pouches. No ripe eggs observed. 



Habitat : In the intestine of Trimeresurus formosus (type host) ; 

 Island of Mentawei, East Indies (type locality). 



Type: Specimens in Professor C. Parona 's collection labelled 

 " ' Arynchotaenia trimeresuri Par., Trimeresurus formosus, (Mentawei)." 

 Also two toto preparations of the same material in the collection of 

 Professor H. B. Ward. 



Parona (1898:7-11) first described and figured this species without 

 discovering its relation to the Proteocephalidae. Luhe (1898:652) 



