BY T. HAIIVEY JOHNSTON. 79 



point of junction of the \agina and the other female ducts made 

 out. 



The vagina is a wide, short tube leading from the female pore 

 inwards, to become greatly widened to form a rounded recepta- 

 culum seminis lying between the ovarian lobe of that side and 

 the cirrus-sac. A short continuation of the canal passes inwards 

 and backwards below the middle of the ovary. Its course could 

 not be followed further. 



The uterus does not persist, as the eggs in segments which 

 have just jjas-sed sexual maturity, are found in great numbers in 

 the parenchyma. The eggs are rounded, having a diameter of 

 0-0234 nun., the shells closely investing the oncospheres. The 

 embiyonal booklets are very delicate, and are only 0*008 una. in 

 length. 



Systeviatic. — The only other species of Davainea described 

 from birds belonging to the Charadrii/ormes, is £>. ndn uta Cohu* 

 from Trituja totanus (from North Germany), a host-name whicJi 

 Fuhrmann f has not been able to find. D. hinumfopodis and J). 

 tuiiinfa show very close resemblance in regard to the form of the 

 strobila, tlie characters of the scolex, and the geneial disposition 

 of the genitalia as given in Cohn's figure. A comparison oi the 

 two accounts shows that ijhe former diliers fi-om the latter in the 

 following points the smaller scolex, the possession of fewer testes, 

 and the much earlier appearance of both male and female genital 

 organs. Cohn's account is short and incomplete, as he had only 

 inunature specimens. 



The type-slide of i>. h'uuantopodis will be preseutetl to the 

 Trustees of the Australian Museum, Hydney. 



EXPLANATION OF PLATES iv.-vi. 

 Plate iv. 

 Choanolomia 7neliphagidarwm. 

 Fig. 1. — Scolex. 



Eig.2. — Segment sliowing geiiilalia. 

 Fig.3. — Female organs, etc. 

 Fig.4.-P:gg. 



* Cohn, L., Nova Acta, etc., Ixxxix., 1901, p.414. 



t Fuhtniaiiii, Zoolog. Jalul). Suppl. B(l..\.,l,1908, p.ll9. 



