16 FEINAR LÖNNBERG AND L. G. ANDERSSON, DR. E. MJÖBERGS EXPEDITIONS TO AUSTRALIA. 3. REPTILES. 
Appendix. 
Crocodilus johnstoni KREFFT. 
There was no specimen of this kind in the collections of Dr. MJÖBERGS expe- 
dition, but I have later had the opportunity of obtaining through Mr. LAURELL 
Phil. Cand. quite a good representative of this interesting Crocodile, which now is 
kept in the Nat. Hist. Museum. It measures about 211 cm. from the snout to the 
tip of the tail. It has 19 teeth on either side of the upper and 16 in the lower 
jaw. The mandibular symphysis extends to the interspace between the 6th and 7th 
teeth. There are four postoccipital scutes in a transverse row with a median inter- 
space. Six nuchal scutes are arranged, as described in Cat. of Crocodiles B. M., sub- 
continuous with the dorsals which form 19 transverse rows, the two first with two, 
the third with four, the fourth to l5th with six, the remaining with four scutes. 
On the middle of the body all the scutes even those of the outer rows are broader 
than long. The proximal part of the tail is covered above by scutes arranged in 
transverse rows of four. The keels on the lateral of these increase in height distally, 
and on the llth to l17th they form high swimming crests, at the same time as the 
median interspace between them is narrowed. Behind the pair of crests of the 17th 
transverse series there are 11 single crests forming the caudal fin. The last or 29th 
segment of the tail has no dorsal crest. 
KREFFT'S! original description differs from this one with regard to the number 
of the dorsal scutes. According to the former the fourth transverse row should have 
only four scutes, but the 7th to 19th as many as eight. This may, however, only 
be an individual variation, or perhaps the author quoted counts to the dorsal disk 
a separate longitudinal series on either side consisting of 9—10 smaller scutes. 
The distance from the eye to the end of the snout in this specimen is 26'/2 
cm. and the width of the snout on a level with the anterior corners of the eyes not 
quite 10 cm. The narrowest part of the snout is only 3,2 cm. The greatest width 
of the head behind is 16'/2 cm., and its greatest length about 40 cm. 
Other details agree with the published descriptions. The broad black blotches 
on the sides of the body are well developed. On the sides of the tail the spots are 
small and few in number, and on the back they appear to form some ill defined 
crossbands. 
1 Proc; Z00L. Soc. London, lel(BLP-S30. 
