411] PSEUDOPHYLLIDEA FROM FISHES— COOPER 123 



BOTHRIOCEPHALUS CUSPIDATUS Cooper 1917 



[Figs. 24, 25, 69, 70, 86, 102, 106, 107] 

 1917 Bothriocephalus cuspidatus Cooper 1917 : 37 



Specific diagnosis: With the characters of the genus. Medium sized ces- 

 todes up to ISOnini. in length by 2.75 in breadth. Scolex large w-ith very prom- 

 inent terminal disc deeply notched surficially; bothria long and narrow and 

 quite deep posteriorly giving the scolex when viewed laterally the appearance 

 of an arrow-head; 3.3mm. long, 1.0 wide at middle, 2.5 deep posteriorly. 

 First segments subcuneate and circular in transection, with prominent posterior 

 borders; middle gradually broaden until much wider than long; posterior two 

 to four and half times wider than long, or 1 to 2.7mm. in width by 0.8 in length. 

 Posterior end of strobila usually rounded, even when segments have already 

 become detached. 



Cuticula 3.5jLt thick, subcuticula 58/x. No calcareous bodies. Longi- 

 tudinal muscles not in bundles. Four main longitudinal excretory vessels. 



Genital cloaca median, halfway between anterior and posterior borders of 

 proglottis, deep and funnel-shaped. Vaginal opening close behind that of 

 cirrus; hermaphroditic duct obscure. 



Testes on each side separated into two fields by the nerve strand, inner 

 much narrower than outer; 50 to 60 in each proglottis; 110, 60 and 80/i in 

 maximum width, length and depth respectively. Vas deferens a large compact 

 mass of coils, elongate and lateral to cirrus-pouch, 0.22mm. long by 0.16 in 

 width, alternates irregularly from right to left. Cirrus-sac very large and 

 thin-walled, 0.25mm. in length (depth) by about 0.20 in diameter. Cirrus 

 protruded, 135ju long by 85 in diameter. 



Ovary compact, with limbs often turned forward, 0.60mm. wide, 0.10 long 

 and 0.13 thick; isthmus thick. Oocapt 20 to 25)u in diameter. Vitelline fol- 

 licles 800 to 1000; 70, 50 and 45/i in maximum depth, width and length, re- 

 spectively; occupying almost the whole of the cortex, strongly imited dorsally 

 and ventrally. Common vitelline duct long and narrow. Uterine duct con- 

 fined to one side of the median line, opposite the cirrus-sac, alternating irregu- 

 larly from side to side. Uterus-sac spherical, occupying one-third of the dia- 

 meter of the proglottis; opening median, close to the anterior edge of the latter. 



Eggs ellipsoidal, 62 to 66m long by 42 to 45 wide, oncospheres not developed 

 within uteri. 



Habitat: Ceca and intestine of the host. 



