504 . A NEW AVIAN TREIIATODE, 



Explanation or Plate xxvi. 

 Holostomum repens, n.sp. 



Fig. 1. — Reconstruction of posterior region, showing relations of tlie leproductive organs. 

 Fig. 2. — Transverse section through the main lateral lobes of the dorsal w:ill of the plug. 

 Pig. 3. — Reconstruction of anterior region, showing various processes of the clinging plug. 

 Fig. 4. — Transverse section through the posterior region of the cup. 

 Fig. 5. — Transverse section through the testes, shell gland, uterus, vas deferens. 



Explanation of Lettering for Text Fk.ire axu Plate. 



b.c. bursa copulatrix; c.c. cavity of cup; on. circular muscle; c.p, clinging plug;" 

 d.hn. dorsal longitudinal muscle; d.2v. dorsal wall of plug ; e.g. eggs ; eg. in lit. eggs in 

 uterus; ex. excretory vessel; gl. gland; g.p. genital pajjilla ; inl. intestine; Ic. laurer's 

 canal; It. lobes of testis; m.d.p. median dorsal process of plug; m.v.d. single unpaired 

 vitelline duct ; oi>. ovary; oot. ootype; ovid. oviduct; ph. pharynx; pr,. process arising 

 from base of ventral lamellar wall ; /r^. process arising from base of median dorsal lobe ; 

 r.a.u. receptaculum seminis uterinum ; ih.g. shell gland ; t ,. anterior testis ; t^. posterior 

 testis ; td. transverse yolk duct : ut. uterus ; vd. vas deferens ; v.g: vitelline glands ; 

 v.s. ventral sucker; I'.sein. vesicula seminalis; v.u\ ventral lamellar wall of plug; 

 y.r. yolk reservoir. 



