sis Nee General Notes. | Match, 
» 2. Crocodilus ebertst shows the same conditions as A. missis- 
sipplensis. . 
In Alligator darwini the axis-rib is connected with the atlas- 
center. Ludwig, considering the atlas + axis as the axis, says 
that it articulates with the axis. 
3. In the Enaliosuchus-axis a diapophysis is present. Koken 
believes that Enaliosuchus has a simple rib connected with this dia- 
pophysis. This can not be correct; if the diapophysis is present 
there must be an articulation for the tuberculum of the rib. The 
tuberculum never disappears before the capitulum. I believe that 
in Enaliosuchus (if it really belongs to the Crocodilia) a complete 
rib was developed in the axis, the capitulum articulating with the 
- well-developed diapophysis, the tuberculum with the axis-centrum 
or with both the axis and atlas, or with the atlas alone. This face 
will probably be found if the atlas-rib is removed. 
In the Teleosaurus-axis the diapophysis and the parapophy- 
sis are developed and the ribs two-headed. 
Deslongchamps describes an additional rib connected with the 
atlas-center, but he figures no articular surface for this rib on 
the atlas. It is a morphological impossibility that a rib should 
exist between the ribs of the atlas, connected with the hypa- 
pophysis, and that of the aris. 
At first when I saw Deslongchamps’s figures I reached the 
conclusion that the axis-rib had entirely disappeared in the living 
Crocodilia, and that the vi% i question represents the rib con- 
nected with the atlas-center (the true atlas-rib), but since I have 
ie shown that the axis-rib has not disappeared in the living Crocodilia, 
Py but is shifted in front of the axis successively, I must abandon 
be this view. 
Koken believes that the additional “ rib” in Teleosaurus rep- 
resents the tubercular part of the atlas-rib. This may be, but it 
= ` iş not probable. If the atlas and axis of the Parasuchia (Belo- 
a Stagonolepis) are known, we probably will get more light on 
-this point. i 
I give the following results: : 
| All crocodiles possess ribs of the'atlas and ribs of the axis. 
In the older crocodiles (Teleosaurus) the axis-rib has a well devel- 
- ped capitulum and tuberculum, the latter articulating with a well- 
_ devloped diapophysis. A similar condition is shown in Enaue 
_ Suchus from the Lower Cretaceous. 
à ; Later the diapophysis, and with it the capitulum, get rudimentary, 
the axis-rib loses its articulation with the axis and is shifted to the 
. 
All crocodiles. possess a hypapophysis (unteres Schluss-stück) , 
ibe alas: 2 P : 
