Kingsley.] 
170 
[April 20, 
a paper by M. Paul Gervais . 6 This author mentions a case of 
polymely in Pelobates cultripes where there was an extra fore 
foot on the right side, differing but slightly from the normal 
member. 
This note by M. Gervais called the attention of others to the 
subject and several papers describing specimens to a greater or 
less extent were almost immediately published. The eminent 
Herpetologist, M. Aug. Dumeril was among the first to add to 
our knowledge of these interesting monstrosities by describing 
and figuring three cases ( 4 and 5 ). In the first, a specimen of Rana 
viridis, the two usual hind legs are normal and perfectly devel- 
oped, while a third projects from the dorsal surface between them 
and a little to the left of the median line. This supernumerary 
member is slender and as the femur is entirely absent the leg is 
but little more than half the length of its fellows. An anatom- 
ical investigation showed that the corresponding ileum was 
enlarged, bifurcated at its posterior extremity and presented a 
small apophysis, but, as was mentioned above, the femur being 
absent the connections were wholly by the soft parts, and there 
was no true articulation. This extra member also exhibited a 
tendency toward augmentation of parts. The tarsus was normal 
but there were six metatarsals and six phalanges, the two external 
toes on each side being of the usual length while the median two 
which replaced the normal third were much shorter. The foot 
and tarsus offered not the slightest trace of the fusion of two 
members. 
A specimen of Rana temporaria is next described in which 
the additional foot was attached to the left of the lumbar region. 
Though slender, this leg was less deformed than in the foregoing 
case, there being a true articulation, the articular cavity nearly 
complete and the femur present. 
In a specimen of Rana clumata from North America was 
found a case of that form of polymely termed by St. Hilaire, 
Gastromely, there being a pair of additional legs borne on the 
anterior portion of the pelvis. 
Raphael Cisternas is next in order, describing a specimen of 
Alytes obstetricans 2 with an additional hind leg in which the 
femur was only a little developed, the central and pedal portions 
more so. But four metatarsals and four toes were present. 
