(;i4 



this speuies identical witli Gliapiuau's Taeuiu tauricol- 

 lis. In this latter point -Mouticeili is probably iu 

 error, while as for the genus, it certainly rests upon 

 too weak characters to be recognized at present. The 

 "anterior sucker'' is, of course, the invaginated rostel- 

 lum and sac; the only valuable chai*acter remaining 

 is the single testicle. The bilobed dendritic ovary, 

 the form of the segments, etc.. must all be rejected as 

 generic chai-acters. 



The exact status of the genus and the ? one or ? 

 two species, (tauriccJlis and argentina) mnsl be left 

 undecided for the present. 



f Genital poivs alternate '- 



I Genital jKires generally unilateral, 

 1. < occasionally alternate; rostellum 



I with about 200 hooks 6 fi long D. tetragona, p.619 



L G-enital pores unilateral 4 



C Segments not over 5 in number; 



1 strobila 1.5nim long or less: rostel- . 

 , I lum with about SO hooks 7 /' long; 

 "I found in chickens D. proglottina. p.614 



I Segments numerous, and strobila 



I much longer than l.Sn"" .". 



f Rostellum with about 100 hooks S /t 



I long; found in chickens and (v 



D. echinobothrida, p. 61S 

 3. { Rostellum with 20S hooks 7 /i to 8 /J 



long; found in chickens D. cesticillus. p. G17 



I Rostellum with about SOO hooks 11 /i 



I long; found in quails D. circumvallata. p. f.l." 



I Rostellum with 150 hooks 12.S // long; 



I found in pheasants D. Friedbergeri. p. 621 



4.'! Rostellum with ca. 60 hooks 11 /( 



I long; found in pigeons and (?.i 



I. ducks D. crassula. p. 623 



a. Genital pores Irregrularly alternate 



19. DAVAINEA PROGLOTTINA (Davalne, 18G0) R. Blanchara. 1S91. 



(1860, Taenia proglottina Davaine; 1881, 'T. proglottidina Dav." 



of Plana.) 



[PI. XV, figs. 194-19S; PI. XVI, figs. 199-202.] 



Diagnosis: O.rimm to l.osmm long by O.lSmni to O.-oOmm broad. 



Head club shape to quadrangular. 140 ji to 2S0 fi long by 135 /i to 



200 fi broad, rather rounded in front and slightly consticted in 



