T. B. ROSSETER ON HYMENOLEPIS FARCIMINALIS. 297 



oiseaux," and after eliminating a great number of species in 

 consequence, "qu'on ignorera la structure de leur appareil 

 genital," lie concludes : " En somme Taenia serpentulus, T. 

 angulata, T. nasuta, et T. farciminalis sont les quatre seules 

 especes de teniades des oiseaux que Ton pourrait avec quelque 

 vraisemblance incorporer aux Hymenolepis." 



Since Blanchard wrote the above, many species of avian 

 tape-worms known then and since discovered have been trans- 

 ferred to the genus Il/jmenolepis by various helminthologists who 

 have studied their anatomy, more especially by Dr. von Linstow. 



Dr. von Linstow, Archiv fiir Mile. Anat., Band 33, p. 452, 

 Taf. 28, figs. 19-27 (1893), studied and wrote a memoir on 

 Taenia serpentulus, Schrank (non Dujardin), but he did not at 

 that time advocate its transference to the genus Hymenolepis, 

 although he would in every respect have been justified had he 

 done so, especially as his specimen had three testes. He justifies 

 himself by saying that Weinland " wohl eine dreifache Eihulle 

 gesehen habe," whereas in his specimen, " Die Eier haben eine 

 doppelte hyaline Hiille." My reason for referring here to 

 T. serpentulus is because the scolices of T. farciminalis and 

 T. angulata agree with those of T. serpentulus in possessing the 

 same number of hooks, viz. ten, and there is some superficial 

 similarity between them ; but a careful examination enables one 

 to discriminate between them. 



The bibliography of the strobila and the formation of the 

 proglottides given by the various authors quoted above is very 

 meagre and unsatisfactory, for beyond the statement of Goeze and 

 the drawings he gives to substantiate his nomenclature we have 

 in reality nothing to indicate the reasons for his name. 



According to Krabbe it is very doubtful whether the specimen 

 that Batsch had under consideration was T. farciminalis, or 

 whether it was the same specimen as Dujardin describes in his 

 Hist, des Helminths, No. 26, p. 569, as T. undidata. Krabbe 

 gives us no dimensions of Batsch's worm. 



Creplin, who took his specimen from the starling, at Greifs- 

 wold, says that his specimen was 120 mm. long and 1 mm. broad. 

 He describes the genitalia as being unilateral, and states that the 



