36 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



BORBOROCOETES GrAYII. MiM. 



Plate XVII.— Fig. 2. 



Dentibus palatinis in fasciculis subcontiguis pauld obliquis, pone nares posteriores 

 positis ; palmis non tuberculatis. 



Habitat, Yaldivia. 



This species considerably resembles the former in most of its characters. 

 The palatine teeth, however, form at once a certain and tangible distinction, and 

 there are some minor points in which they differ, sufficient at a glance to deter- 

 mine them. The head in the present animal is broader than it is long; in the 

 former the breadth is only equal to its length. The palms are in this species 

 without conspicuous tubercles ; in the other there are two, although very small. 



In colour it differs much from the former. The general colour is a rich 

 fuscous brown, rather paler beneath ; the flanks, the throat and belly, and the 

 whole of the thighs and legs, with various white markings, those of the throat 

 and belly being the smallest. This species was found in the forest, in Valdivia. 



Genus— PLEURODEMA. Tschudi. 



I have thought it right to follow Tschudi in separating from the genus 

 Cystignatfms of Wagler, such species as have large and conspicuous lumbar 

 glands, particularly as they all agree in possessing a much more bufonine aspect 

 than the others. The discovery of three new species, all agreeing in these 

 characters with Pleurodema Bibronii of Tschudi, increases the importance of the 

 grounds upon which this separation is made. 



Pleurodema. Darwinii. MiM. 



Plate XVII.— Fig. 3. 



Dentibus palatinis paucis, minimis ; lingua subcordatd, vix emarginatd ; glandulis 

 lumborum magnis, rotundis, convexis ; digitis posticis ad basin tantiim membrand 

 connexis ; dorso sparsim tuber culato-glanduloso ; supra pallidb virescens, maculis 

 fusco-olivaceis. 



Habitat, Maldonado. 



