62 DR. J. ROUX ON THE TOADS [Jan. 16, 



7. Nectophryne guentheri BlgT. 



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



Boettger {Nectophryne exigua), Abhaiidl. Senck. Gesells. 1901, 

 vol. XXV. p. 394, 



Examined in Brit. Mus. : — 



The type specimen from Matang, Borneo. 

 2 young specimens | ^^^^^^ ginga^pore. 

 2 adult „ J ^ ^ 



2 adult „ from Sirhassen (Natuna Isl.). 



Also the type specimen of I^ect. exigua in the Senckenberg 

 Museum : Baram Riv., N. Borneo. 



In this species, as in others, I have also noticed individual 

 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 eye but notably behind it. 



Establishing a comparison between the type of JS^ectojAryve 

 exigua Boettger and young individuals of JVectophripie gicentheri, 

 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 

 JV. guentheri Blgr." 



On examining several specimens of iV. gihentheri I have noticed 

 difierences not only 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 

 propoi-tionally 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 I'ljj 



Specimens from Singapore. 



Adult. Adult. Juv. Juveuiss. 



2 1-75 1-9 f mm. 



1 1-5 1-3 1 „ 



A young specimen of JSf. guentheri in particular, wdiich is just 

 as large as the type of iV. exigua, shows in the general foim of 

 the bo'dy as well as in the colour a striking likeness to the latter. 



Similar black spots are distributed 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 iV. guentheri 

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

 considered a young specimen of N'. guentheri. Very appreciable 



