79] PROTEOCEPHALIDAE — LA RUE 79 



Type: Bottled material No. 09.10 in Dr. H. B. Ward's collection, 

 and slides of same. 



Some pieces of strobila without heads were received by Dr. H. B. 

 Ward from Professor Zschokke of Basel. These were labelled ^'Taenia 

 longicollis Rud., aus Forelle, Zschokke." The bottle is now No. 09.10 in 

 Dr. H. B. Ward's collection. Four toto unflattened preparations were 

 made from this material. This material formed the basis of the prelimi- 

 nary report, La Rue (1911 :477). 



Head, suckers and neck were not seen. A proglottid with eggs in 

 the uterus measured 0.5 mm. long by 0.93 mm. broad. A ripe proglottid 

 very full of eggs was 0.75 mm. long by 1.53 mm. broad. The outlines of 

 the segments are rough, with several indentations on the margin of each. 

 Proglottid limits are well defined by the indentation at the corners and 

 by the rounded corners. A slight prominence bears the genital pore. 



Genital pores alternate irregularly in the strobila. They are situ- 

 ated one in the middle of a lateral margin of each segment. This genital 

 pore leads into a common atrium into which the cirrus-pouch and vagina 

 open. When the cirrus is partly protruded the cirrus-pouch is con- 

 stricted near its inner end (Fig. 81). It is also reduced in length, meas- 

 ing in various states of contraction 0.185-0.190-0.220-0.265 mm. by a 

 maximum breadth of about 0.080 mm. In a single proglottid the cirrus- 

 pouch was in a normal condition. This is delineated (Fig. 82). This 

 cirrus-pouch measures 0.390 mm. long. The length of the cirrus-pouch 

 is about 14-3^ the breadth of the proglottid. Sometimes the cirrus is 

 somewhat protruded tho it has not been seen completely protruded. It 

 is blunt at the tip. Within the cirrus-pouch the cirrus and ductus 

 ejaculatorius are straight. The one passes imperceptibly into the other. 

 Coils of the vas deferens cannot be seen clearly but their confused out- 

 lines may be discerned in the middle region of the proglottid left vacant 

 by the testes. The testes numbered 75 and 76 respectively in two pro- 

 glottids in which they were counted. They are spheroidal, 0.042-0.053- 

 0.064 mm. in diameter. It seems that they lie in one plane, filling the 

 space between the vitellaria anterior to the ovary. 



The uterus (Fig. 81) is made up of a median ventral tube from 

 which 7-9 lateral pouches arise on either side. No uterine pores were 

 discovered. The vitellaria are follicular and situated near the lateral 

 margins of the segment. The follicles are small and quite compact. In 

 the present species the vitellaria are less well developed than in P. cer- 

 nuae. The ovary is bilobed and is posteriorly situated. The lobes are 

 long, thick and heavy, and have smooth outlines. In ripe proglottids the 

 span of the ovarian lobes may be 0.60 mm. The vagina (Fig. 82) tho 

 apparently situated anterior to the cirrus-pouch has its opening into 



