92 



PROCEEDINGS OF THE \\TI<>\ I /. MUSEUM. 



VOL. 38. 



Of the 86 species enumerated below 7 are truly marine snakes and 

 turtles, and therefore have no bearing on the problems of the geo- 

 graphical distribution of the other species. 



Of the remaining 79 species no less than 24 species are peculiar to 

 I he island, as follows: 



Amphibia. 



1 . I in I'd banhon n 



2. Microhyla fissipes. 



3. Microhyla stt inegeri. 

 1. Rana longicrus. 



5. Rana swirihoana. 



1 1. Japalura svririhonis. 



12. Japalura mitsukurii. 



L3. Tahydrom us form osa n us. 



1 1. Tahydromus sauteri. 



L5. Tahydromus /•"* n, i. 



L6. Natrix svririhonis. 



17. Natrix sauteri. 



6. //<///'/ sauteri. 



7. /■'(///'/ /'///)- hensis. 



8. A'a//i/ adenopleura. 



'.). Polypedates moltrechti. 



in. Polypedates robustus. 



Reptiua. 



18. Xenodon stejnegeri. 



L9. Maeropisthodon carinatus. 



20. Achalinusformosanus. 



21 . Oliijodon ornatus. 



22. Dinodon ruhstrati. 

 2:;. /,'o/V/i/ /■/•.■! ■/)< /////. 



2 1. Amblya phalus formosi rms. 



Thus 50 per cent of the batrachians of the island are peculiar, but 

 only about 2(> per cent of the reptiles. 



Both of these figures are high, and it is quite possible that a few 

 of the species now listed as peculiar may be discovered later in some 

 pari of southern China. It is also possible that a slight reduction 

 may eventually have to be made in the genera Rana and Talcydromus, 

 but this loss is just as likely to he offset by future separation of 

 island forms now though! to be identical with the. mainland species. 



Of the 10 peculiar batrachians the relationship of 2 is somewhat 

 dubious, namely, Microhyla steinegeri and Rana taipehensis.- Two 

 have t heir nearest relations known in the Riu Kins and Japan, namely, 

 Polypedates moltrechti and P. robustus. Two more are nearly related 

 to Chinese species, namely, Microhyla fissipes and Rana longicrus, 

 while the remaining I have distinct leanings toward species at home 

 in the eastern Himalayas and the high country immediately to the 

 cast , Burma, Yunnan, etc. 



Of the 1 1 peculiar reptiles the 3 species (?) of Talcydromus are closely 

 related to Chinese forms, while all the others are more or less inti- 

 mately related to species occurring in the western provinces, on the 

 upper Yangtse River, Upper Burma, Assam, or the eastern Himalayas. 

 Two of the snakes, Oligodon ornatus and Boiga Icrxpelini, do not 

 appear t'» have any near relations in China at all. It is not intended, 



however, to Ia\ stress on the absence of these species in China, or in 



• ; \\ hich in their turn arc related to a Himalayan Bpeciea 



