24 EMYDOSAURIAN AND TESTUDINIAN REPTILES 
As an illustration of the evil effects which may, and in 
fact do, follow this omission, I may be permitted to point out 
that if a Chelodina, otherwise than C. nove-guinee, should be 
received by me from any part of Papua, I should feel myself 
justified in ignoring Herr Werner’s species and describing 
mine as new; and the confusion, if any should arise, 
would le at the door of the Austrian author not at mine 
(see Appendix, p. 30). 
Some twenty years ago the late Sir William Macleay 
made a similar appeal for consideriation to continental 
authors, but apparently it was of no avail. 
In the same category as Chelodina siebenrocki would 
Pseudemydura umbrina* have had to be placed, so far as its 
author is concerned, but fortunately Dr. Steindachner, with 
whom I had communicated in references to these two species, 
sent me a copy of the description. My best thanks are due 
to this gentleman for his promptitude in answering my appeal. 
I am sure that it is only necessary to call attention to the above 
omission in order to have it remedied. 
Genus VII. EMYDURA. 
THE Mvp TorrTo!sEs. 
Emydura, Bonaparte, Arch. f. Nat., i. 1838, p. 140 (macquariz) ; 
Boulenger, Catal. Chelon., p. 228, 1889. 
Chelymys, Gray, Catal Tort., p. 42, 1844 (macquarii=australis). 
Euchelymys, Gray, Ann. & Mag. Nat. Hist., (5) viii. 1871, p. 118 
(sulcifera=macquarit). 
Nuchal shield present or absent, marginal; second 
vertebral shield as large as or larger than the first ; intergular 
shield moderate, marginal, situated between the gulars 
and humerals. Neck shorter than the dorsal vertebral column. 
Alveolar surface of upper jaw without median ridge; sym- 
physis of lower jaw wide. Chin with or without dermal 
appendages. (éyvs, a fresh-water tortoise ; dupa, tail). 
Australia and New Guinea. Species seven. 
a. Upper surface of neck with small rounded tubercles. 
b. Width of bridge less than one third of the length of the 
plastron ; nuchal shield present. 
c. Plastron subtruncate or rounded anteriorly: barbels 
present, small .. 6 $8 ote i. macquarit. 
ce, Plastron obtusely acuminate anteriorly; barbels ab- 
Berth As ay ze ar op 2. albertisii. 
*Pseudemydura umbrina, Siebenrock, Anz. Ak. Wien, 1901, No. xxii. 
