G2 DR. J. ROL'X ON THE TOADS [JjUl. 16, 



7. Nectophryne guentheri Blgr, 



Boiilenger, Cat. Batr. Sal. p. 280, pi. xviii. fig. 3. 

 Boettger [Nectophryne exigva), Abhandl. tSeiick. GeselLs. 1901, 

 vol. XXV. p. 394. 



Examined in Brit. Mus. : — 



The type specimen from Matang, Borneo. 



2 young- specimens 1 r. e< • 



2idult „ j from brngapore. 



2 adult ,, from Sirliassen (Natuna IsL). 



Also the type specimen of Nect. exigua in the Senckenberg 

 Museum : Baram Eiv., N. Borneo. 



In this species, as in others, I have also noticed indis-idunl 

 variations in the length of the limbs. The hind limb being 

 carried forward along the body, the tibio-tarsal articulation 

 reaches sometimes the eye, sometimes between the latter and the 

 end of the snout. In the typical specimen it does not only reach 

 the eve but notably behind it. 



Establishing a comparison between the type of JVectophryne 

 exigua Boettger and young individuals of Nectojiihryne gvenilierl, 

 I have been convinced that these two species are identical. 



The differences are indicated by Boettger as follows : 



" Habitus etwas weniger schlank ; Trommelfell kleiner als bei 

 N. guentheri Blgr." 



On examining several specimens of N. gueidherl I have noticed 

 differences not onl}' in the respective length of the body and of 

 the limbs, but also in the respective dimensions of the tympanum 

 and of the eye according to age. The young specimens have 

 proportionally a smaller tympanum than the adults. Besides 

 individual variations have been observed. Some measurements 

 follow :— 



Type spec. Spec, from Sirhassen. 



Eye 3 1-9 2 mm. 



Tympanum 2 1 l"!;) 



Specimens from Singapoi'e. 

 Adult. Adult. Juv. .luveiiiss. 



2 1-75 1-9 -; mm. 



1 1-5 1-3 1 „ 



A young specimen of N. guenthe7'i in particular, which is just 

 as large as the type of N. exigua, shows in the general foi-m of 

 the body as well as in the colour a striking likeness to the lattei-. 



Similar black spots are distiibuted on the belly, and the 

 coloration, yellow and black, on both sides of the head is identical. 

 The limbs show also the same extent of web. 



As, on the other hand, it is impossible not to recognise the 

 existing relations between the young specimens of JV. guentheri 

 with adults of this species, I believe that N. exigua may be 

 considei'ed a yoimg specimen of N. guentheri. Very appreciable 



