632 



lier about 60. CJenital poii-s unilateral: oiiius pouch visible in 

 twonty-sixth to forty-fifth segments; forty-sixth to sixtieth seg- 

 ments are gravid. The eggs, so far as can be judged from the 

 figure, are scattered and isolated as in D. proglottina. 



I i-au not si'o (hat Polonio's description and figure 

 are suftiiient to compel or even to allow the recogni- 

 tion of (his specitic name. If the types can be obtained 

 and rt-!;(tuliiHl. it would of course be proper to rede 

 scribe them under the specific name cantaniana, but 

 until those types can be found it is useless to waste 

 time speculating as to the possible generic or specific 

 relations of the parasite. I propose to ignore the 

 sfiecies entirely, on the ground that the specific name 

 lias not been accompanied by a recognizable descriji- 

 lion or figure. 



SS. Taenia Delafondl Rallllet. 1S9». 



tlS9I, "Taenia sphenocephala Rud.," ISIO, of Megnin.) 



[PI. XX, figs. 267-262.1 



Diagnosis: Strobila 7c«n to 13cm long, 3""" to 4"'"" broad. 

 Head he^mispherical, rostellum and hooks absent. Suckers 

 larg«. Neck 0.5mm or more long, at first as broad as head, en- 

 larging distally. Proximal segments very short, following seg- 

 ments slightly longer and very bnoad. lateral margins convex. 

 Genital pores irregularly alternate, situated near the anterior 

 quarter of the lateral border; two lateral ramefied uteri visible 

 as two longitudinal rows of opaque spots; another submedian 

 series formed by recaptaculum seminis; testicles rather num- 

 erous. Ova globular 62 /t to 65 /i hooks of oncosphere 11 f 

 long. Developmejit : Unknown. 



Type specimens: In Alfort collection. 



Hosts: Domestic pigeons (Columba li>ia domesUca) by Del- 

 fond. Railliet. Megnin, and von Linstow. Geographical dis- 

 tribution: Fiance and Germany. 



This api^ears to be a very peculiar form. Its syste- 

 matic position, as well as its synonymy and anatomy, 

 seem (0 me c.xtremelv r.ncertain. 



