156 DISCOGLOSSID^. 



grouped together as a var. brevlpes, Blasius, in which 

 we notice a gradual predominance of yellow together 

 with an attenuation in its intensity as we proceed from 

 west to east. There is yet a third form, from Monte- 

 negro, with which I am only acquainted through Schrei- 

 ber's description, and which perhaps deserves to rank 

 as a variety ; the lower parts are black, without or 

 with small and isolated yellow spots. The skin is 

 described as comparatively smooth, with widely sepa- 

 rated warts covered with a black horny layer. 



1, 5. Mondorf, Luxemburg : Boulenger. 



2, 6. Marcellise, Prov. V"erona : De Betta. 

 3. S. San Bruno, Calabria : Giglioli. 



4, 8. Parnassos : Kriiper. 



7. Arsoli, Rome : Vinciguerra. 



Skeleton. — The osteological differences between 

 this and the preceding species are very slight indeed. 

 The most constant is found in the length of the tibia, 

 which equals that of the femur. The sacral diapo- 

 physes are usually not quite so strongly dilated, and 

 the bones are nearly white instead of yellow as usual 

 in the allied species. 



As has been shown by Goette, whose great work 

 ' Bntwickelungsgeschichte der Unke ' deals with this 

 species, by Camerano (' Atti Ace. Torin.,' xv, 1880, 

 ]). 446) and by Sasserno (op. cit., xxiv, 1889, p. 703), 

 there often occur curious individual anomalies in the 

 posterior vertebrae, which may result in asymmetry of 



