On new BatracMans from the Andes. 185 



M^'IxTOSH. 1874. Trans. Zool. Soc. vol. ix. part vii. " Ou British 



Annelida." 

 . 1885. ' Challenger ' Reports, Zoology, vol. xii. " Annelida 



Polvcha?ta." 

 . ]9d0. 'Monograph of British Annelida. — Part II. Polychteta.' 



Eay Society, 

 NoRMAx. 1890. Ann. & Mag. Nat. Hist., May 1890. 

 DE QuATREFAGES. 1865. ' Histoire des Anneles,' vol. i. 

 Sars, G. O. 1873. Nyt Mag. f. Naturv. xix. " Bidrag til Kunsdab 



om Christiauiafjordens Fauna. — III. Annelida.'' (From MSS. of 



M, Sars.) 

 St. Josepi£. 18S8. Annales des Sciences Naturelles, ser. vii. t. 5. 

 Theel. 1879. " Annelides Polychetes des Mera de la Nouvelle- 



Zemble,'" Svenska Vet.-Akad' Ilaudl., Band xvi. No. 3. Stockholm. 

 Trautzsch. 1889. Archiv f. Naturg. 55. " Zur Kenntnis der Poly- 



noiden von Spitzbergen.'' 

 Treadwell. 1903. Bulletin of the U.S. Fish Commission, vol. xxiii. 



part 3. " Polychaetous Annelids of the Hawaiian Islands." 



EXPLANATION OF PLATE VI. 



Fig.\. Head of ^MHOfl <;v'to?i?, M'lntosh. Enlarged. 



Fig. 2. Tip of dorsal bristle of Evarne inijjar, Johnst., var. Zeiss obj. D, 



oc. 2. 

 Fig. 3. Mid dorsal bristle of Eucranta villosa, Mgrn. Zeiss obj. D, oc. 2. 

 Fig. 4. Superior ventral bristle of ditto. Zeiss obj. D, oc. 2. 

 Fig. 5. Inferior ventral bristle of ditco. Zeiss obj. F, oc. 2. 



XIX. — Descriptions of new BatracMans from the Andes 

 of South America, preserved in the Biitish Museum. ]iy 

 G. xi. BOULENGER, F.R.S. 



(Published by permission of the Trustees of the British Museum.) 



Hyla melanoph 



eura. 



Tongue circular, entire and slightly free behind. Vomerine 

 teeth in two groups or short transverse series between the 

 rather large choanae. Head moderate, broader than long ; 

 snout short, rounded, as long as the orbit ; canthus rostialis 

 obtuse, loreal region oblique, concave ,• nostril equally distant 

 from the eye and from the tip of the snout ; interorbital 

 space as broad as the upper eyelid ; tympanum distinct, two- 

 thirds the diameter of the eye. Fingers one-fourth webbed, 

 disks smaller than the tympanum ; male with a projecting 

 rudiment of pollex ; toes three-fourths webbed ; subarticular 

 tubercles moderately prominent; a feeble tarsal fold. The 

 tibio-tarsal articulation reaches between the eye and the tip 



