257] PROTEOCEPHALIDAE—LA RUE 257 



duct, unpaired vitelline duct, lower vagina, and a uterine passage are 

 present and these organs are arranged in the manner common to the 

 Proteocephalidae. Monticelli (1899) gives a long and detailed descrip- 

 tion of the arrangement of these organs upon which no comments are 

 necessary. Smith (1908) mistook these organs of the interovarial space 

 for vitellaria. 



The vitellaria are lateral loosely follicular masses which extend 

 throughout the length of the proglottid. The follicles are small, and 

 in some preparations they took the stain poorly. It is probable that 

 Smith had the same difficulty in staining the vitellaria and for that 

 reason he entirely overlooked them. Monticelli states that the vitellaria 

 lie outside of the inner longitudinal muscle layer. The writer has 

 examined nothing but toto preparations which perhaps are not trust- 

 worthy for the determination of this point. Nevertheless it seems that 

 Monticelli 's statement is the result of a misinterpretation of the facts. 

 The uterus (Figs. Ill, 113, 114, 115) is a median tube which in ripe 

 proglottids (Fig. 112) has from 20 to 30 lateral outpocke tings on either 

 side. As these pouches fill with eggs they become rounded and the 

 septa become indistinct. The uterus is not connected with the lobes of 

 the ovary as Smith (1908) figures it. His figure is incorrect. The 

 pouches are more numerous and more closely applied to each other and 

 less slender than he shows them. Uterine pores were not visible in 

 material examined by the writer. As to the method of discharging the 

 eggs Monticelli (1899) writes: "Nelle ultime proglottidi l'utero, pregno 

 a rimpinzato d'uova, sporge alquanto, facendo ernia contro le pareti, 

 sulla faccia ventrale delle proglottidi. Non ho osservato orifizio esterno 

 permante dell'utero, come quelle che Kramer ha visto in alcuni Tetraco- 

 tylus (p. e. T. filicollis) [Monticelli here cites PI. 28 fig. 42 in Kramer's 

 paper of 1892] e neppure ho constato determinarsi uno sbocca prowi- 

 sorio per dar uscita alle uova: penso, forse, l'uscita delle uova all 'esterno 

 avvenga, come in altri casi, per deiscenza." 



According to Smith (1908) the six-hooked embryo measures 0.016- 

 0.018 mm. in diameter, the two membranes 0.028-0.030 mm. and 0.085- 

 0.100 mm. respectively. The writer was unable to measure or to study 

 any eggs of this species hence he is not able to comment on Smith's data 

 nor upon Monticelli 's description of the eggs which is here quoted: 



"Le uova uterine, relativemente piccole, hanno un guscio spesso e molto 

 evidente : contengono gia l'oncosfera involta in una veste, od invoglio, che come 

 una teca a netto contorno e non molte spessa, per quanto ben distinta, circonda, 

 come in altri teniadi, l'embrione. Ciascun uovo, con il relativo guscio, e racchiuso 

 in una capsula grande, sferoidale e di diametro assai piu del doppio del guscio, 



