160 DR. J. DE BEDRIA6A OK THE PTRENEAN NEWT. [Feb. 19, 



their sojourn in water, but as soon as they go on land great care is 

 needed to prevent their ailing and dying. Usually after they have 

 lived for some time in the terrarium they get dark spots, especially 

 on the sides of the body ; those spots enlarge, just as oil-spots would 

 do, until the skin perforates. Left to themselves, without care, the 

 sickly specimens are sure to die ; properly treated, they recover 

 as a rule, even those whose ribs are piercing through the wound. 

 The treatment of this disease is very simple, and I shall mention 

 it, as it is very common especially amongst the high mountain 

 newts, such as M. montana and M. rusconii, and also amongst 

 jiy. waltli ; it consists merely in keeping the invalids in running 

 water ; cold water which is often changed will also do. The vessel 

 in which they are kept must be thoroughly clean and contain 

 nothing but water ; the food should consist only of earth-worms, 

 and the remains of the meal must be taken out. M. aspera feeds 

 upon earth- and meal-worms, flies and aquatic plants ; in captivity it 

 takes rough meat willingly, but it ought not to be fed exclusively on 

 meat. 



EXPLANATION OF THE PLATES. 

 Plate V. 



Fig. 1. Molge aspera ?, typical form. Lower view. 



Figs. 2, 3. M. aspera cS . typical form. Upper and lower view. 



Fig. 4. Larva of M. aspera, full-grown specimen, natural size. 



Fig. 5. A young male of M. aspera. 



Fig. 6. Larva of M. aspera. Side view. 



Plate 71. 

 Fig. 1. M. aspera, S and $ in copula. 



Macfnified figures. 



Figs. 2 and 3. Skull of M. aspera. Upper and lower view. 



Fig. 4. Longitudinal vertical section through the nasal cavity of il/. rusconii. 

 Schematic. Cc. Cavum cranii. M. Maxilla, pm. Premaxilla. pa. 

 Processus ascendens of the premaxillary. v. Horizontal portion of the 

 vomero-palatine reaching tlie horizontal part of the premaxillary (prni) 

 and roofing the cavum nasi. C. Crista ossis vomero-palatini uniting 

 with the ascending process {p<£) of the premaxillary ipmi) and forming 

 the osseous internasal wall. S. Eudimentary, cartilaginous, terminal 

 septal ]:ortion. 



Fig. 5. Longitudinal vertical section through the nasal cavity of M. aspera. 

 Schematic. Cc. Cavum cranii. M. Maxilla, pm. Premaxilla. pa. 

 Processus ascendens of the premaxillary. v. Horizontal portion of 

 the vomero-palatine reaching the horizontal portion of the premaxillary 

 (p«t) and forming the nasal roof. /S. Internasal cartilaginous septum 

 meeting in front the processus ascendens {pa) of the premaxillary 

 (jrm). 



Fig. 6. Partly dissected skull of M. aspera. This figure shows the cavum nasi 

 and the anterior part of the cavity of the brain ; the nasals, prefrontals, 

 and frontals are cut away ; the terminal part of the processus 

 ascendentes, which is seen in fig. 3 partly overlapping the suture 

 of the frontals, is also removed. A transverse cartilaginous plate 

 separates the cavum cranii from the nasal cavities. In front of 

 it a longitudinal median wall (septum cartilagineum) keeps the nasal 



1^ JUN 1895 



