HELMINTH PARASITES OF BIRDS — DENTON AND BYRD 



161 



2 [(2+2 + 2) + (2 + 2 + 2)] flame cell pattern. The vasa efferentia 

 arise from the dorsomedial surfaces of the testes and unite midway 

 between the anterior testis and acetabulum to form a long vas deferens, 



Figure 34. — a, Lutztrema monenteTon (Price and Mcintosh, 1935) from the gall bladder of 

 Turdus migratorius, ventral view; b, optical sagittal section of anterior end of Lutztrema 

 monenteTon from Turdus migratorius, showing ventral flexure of anterior end and the 

 position and deep lumen of the acetabulum; c, Lutztrema monenteron from the gall bladder 

 of Mimus polyglottos, ventral view; d, Lutztrema monenteron from the gall bladder of 

 Toxostoma rufum, ventral view, specimen slightly shrunken; e, Lutztrema microstomum, 

 new species, from the gall bladder of Cyanocitta cristata, ventral view;/, optical sagittal 

 section of anterior end of Lutztrema microstomum from Cyanocitta cristata, showing position 

 of suckers and deep lumen of acetabulum. 



