296 



Artificial key to the indo-australian species 

 of Pisoodonophis. 



A. Origin of dorsal behind end of pectorals. 



1. Dorsal and anal very elevated, height of latter 

 equal to that of body; head and trunk nearly 



twice in length of tail P. hypselopterus p. 296. 



2. Dorsal and anal very low, head and trunk one 

 and a half times or less in tail. 



a. Head 3.2 3.6 times in trunk P. boro p. 297. 



b. Head 4 times in trunk P. micropterus p. 298. 



B. Origin of dorsal above middle of pectorals. 



1. Head and trunk equal to length of tail P. ho event p. 299. 



2. Head and trunk i 1 /^ times in tail P. cancrivorus p. 300. 



Fig. 138. Pisoodonophis boro (Ham. Buch.). X Va- 



i. Pisoodonophis hypselopterus (Blkr.). 



Ophisurus hypselopterus Bleeker, Nat. Tijdschr. Ned. Indie II. 1851, p. 69. 



Verh. Batav. Gen. XXV. 1852, Muraenoid. p. 34. 

 Pisoodonophis hypselopterus Kaup, Cat. Apod, fish 1856, p. 19. 

 Pisoodonophis hypselopterus Bleeker, Atl. Ichth. IV. 1864, p. 63. 

 Ophichthys hypselopterus Gunther, Cat. Brit. Mus. VIII. 1870, p. 79. Fische 



d. Siidsee Heft IX. 1910, p. 400. 



