65] 



PROTEOCEPHAUDAE — LA RUE 



65 



PROTEOCEPHALUS PINGUIS La Rue 

 [Figs. 29-32, 35, 36, 88-93] 

 1911 : Proteocephalus pinguis La Rue, 1911 :478. 



Specific Diagnosis: Characters of genus. Strobila short and slen- 

 der. Observed length up to 90 mm. Maximum breadth 1.24 mm. Neck 

 3-7 ram. long by 0.20-0.25 mm. broad. Proglottids, first in chain very 

 short, 0.05 mm. long by 0.25 mm. broad. Mature and ripe proglottids 

 nearly quadrate or in a few ripe proglottids length exceeding the 

 breadth, 0.595 by 0.595 mm. up to 0.730 mm. long by 0.595 mm. broad. 

 End-proglottid present and functional. Segmentation not very distinct. 

 Intersegmental furrows shallow. Head conical, flattened dorso-ventrally, 

 without furrows, presenting great variations in shape. Breadth of head 

 about 0.33 mm., thickness 0.22 mm., length 0.20-0.25 mm. Suckers cup- 

 shaped, deep, muscular. Diameter of suckers 0.095-0.105 mm., of aper- 

 ture of sucker 0.06-0.07 mm. Diameter of fifth sucker 0.05-0.075 mm. 



Common genital sinus irregularly alternating, situate at or near 

 middle of lateral margin of proglottid. Testes ovoidal, 0.05 mm. long 

 by 0.04-0.05 mm. broad, 54-70 in number, in a single layer taking up 

 field between vitellaria anterior to ovary. Ductus ejaculatorius nearly 

 straight. Cirrus well muscled, straight, length when protruded 0.07- 

 0.08 mm. by 0.02-0.025 mm. broad. Cirrus-pouch short, stout, 0.13-0.14 

 mm. long by 0.05-0.06 mm. broad. Ratio of length of cirrus-pouch to 

 breadth of proglottid 1 :3 or 1 :4. Vagina anterior, but vaginal opening 

 always dorsal to cirrus-pouch. Vagina crossing inner end of cirrus- 

 sheath. Sphincter vaginae small. Receptaculum seminis small, situate 

 anterior to ovary. Uterus, when fully developed, with 10-14 lateral 

 pouches on either side. Ventral uterine pores 2-3 in number. Embryos 

 0.016-0.018 mm. in diameter. 



Habitat: In intestine of host. 



Type: Alcoholics in Dr. H. B. Ward's Sebago Lake collection 

 Nos. 4, 6, 7, 8, 9, 107. Slides of same. The material was collected by 



