28 RECORDS OF THE AUSTRALIAN MUSEUM 



succeed in reaching the thin walled receptaculum and pass thence 

 into the oviduct. 



Lying between the testes and the ovary is the uterus, a long, 

 transversely placed, simple tube which becomes modified later by 

 the development of pouches or lobes anteriorly, posteriorly and 

 ventrally. At first this organ is confined to the dorsal portion 

 of the medulla at about the same level as the main mass of the 

 testes, but with advancing ripeness the lobes develop and come 

 to reach the ventral limits of the medulla. The fertilising duct 

 appears to pass forwards above the ovary to enter the uterus 

 somewhat ventrally in its mid-region. The eggs are rounded 

 or elliptical, possessing two shells, the diameter of the outermost 

 being O022 mm., that of the embryo being - 009 mm. The 

 poles of the inner shell are somewhat thickened as in Aco/eus 

 vaginatus 6 8 . 



A few remarks regarding the genital rudiments may not be 

 out of place. They become distinctly recognisable in the third 

 segment as a transverse deeply staining area in the middle of the 

 proglottis. Within a distance of one mm. from the anterior end, 

 the rudiments of the cirrus sac, ovary and vitellarium are easily 

 distinguishable and at a very short distance further back one 

 may recognise the testes, uterus and receptaculum seminis. All 

 the structures, especially the cirrus sac, develop rapidly in size. 



In regard to the affinities of Acoleus hedleyi, it seems to 

 approach very nearly to A. vaginatus (Rud.), Fuhrm., the main 

 points of difference being the much greater length of the former — 

 an unimportant detail — the number and disposition of the testes, 

 and the armature of the cirrus. 



Typical specimens have been deposited in the Australian 

 M useum. 



TAENIA CORONATA, Kretft. 



(Plate v.) 



A Cestode taken from the White-headed Stilt (Hiinantopus 

 leucocephalas, Gould), in the Hunter Rivet District, New South 

 Wales, was originally described by Krefft 61 as Taenia coronata. 

 The name, however, was already pre-occupied in the genus, 

 having been used by Creplin in 1829 for a tapeworm (Choanotce- 

 nia coronata) from certain other Charadriid birds in the Old 



»s Fuhrmann Centr. Bakt., I., xxviii., 1900, p. .S70 ; Krabbe — 

 Bi drag til Kimdskab om Fu^l.ucs Baendelnrme, 1869, fiR. 189. 

 64 Kreflt— Trans. Entom. Soc. N. S. Wales, Li., 1873, pp. 220-1. 



