GENERA OF THE ARCIFEROUS ANURA. 77 



in many points, since of the remains we possess, the humerus offers some distinctive 

 marks. The latter exhibits two opposite proximal alte, and one internal distally ; 

 all very strong. These are not represented in Von Meyer's figures of the largest of 

 the seyfriedi. In the r u g o s a the front is a little swollen ; there is no median 

 superior process on the coccyx. 



The remains of a vertebral column with sacral diapophyses much more dilated 

 than either of the preceding, probably pertains to one of the species described by 

 Lartet as Rana sansaniensis orR. laevis. Whether this be another Lato- 

 nia, or an animal allied to Pelobates, is not easily determined. In the Natural 

 History Review for 1865, No. I, I stated that a large species of Pelobates occurs in 

 the miocene Braunkohle of Rott, near Bonn, Rhine-Prussia. A further study of a 

 single specimen has convinced me that the species must be referred to the neighbor- 

 hood of the genus Latonia ; the sacrum is more dilated than in the known species, 

 and resembles that of Pelobates. This is « 



ZAPHRISSA m. 

 Z. e u r y p e 1 i s sp. nov. 



The general form is well displayed by an inferior view of the whole skeleton. The 

 extremities, especially the feet, and the pelvis of this species, are elongate. The 

 terminal phalanges were short conic ; the exterior or long metatarsals are closely 

 juxtaposed, the outer the shorter of the two. The tarsal bones are preserved ; the 

 cuneiform was small and little prominent. The length of the astragalus and calca- 

 nium is little less than half the tibia : the latter is relatively slender, flattened and 

 grooved at both ends. The ilia are slightly incurved, slightly compressed distally, 

 and as long as the femora. The impression of the coccyx does not display a strong 

 dorsal keel ; its position corresponds with the axis of the sacrum, although other 

 portions of the skeleton have been much disarranged ; the traces of a small sacral 

 condyle indicate the union with the sacrum by double condyle, as usual in this 

 family. 



The sacral diapophyses are remarkably expanded, almost as in Pipa or Cultripes : 

 they articulate with the proximal three-fifths of the ilia. The remaining vertebra3 

 have been much disarranged ; they were probably eight in number. The atlas is dis- 

 tinct, without processes, necessarily much expanded anteriorly for articulation with 

 the large and separated occipital condyles, and about as long as wide. The diapophy- 

 ses of the second, third and fourth vertebrte are the only ones preserved ; those of 

 the second are longest, and articulate without constriction, with a cylindrical costal 

 appendage. The terminal portion of this is lost, but it has not probably exhibited a 

 posterior process, nor been much dilated. The third pair of diapophyses are the 



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