26 ON THE ZOOLOGICAL POSITION OF TEXAS. 



region. Another covers the tympanum, and a brown band connects 

 the orbits around the end of the muzzle. There are two large brown 

 spots on the lip, one below the eye, and one in front of it. The segments 

 of the limbs have broad cross-bands, excepting the humerus. Below 

 pale, immaculate. 



This species is one of the larger forms of the genus. The nasal bones 

 are in contact for most of their length, but diverge a little posteriorly, 

 displaying a small i^ortion of the ethmoid. This is not typical in 

 Lithodytes, but approaches the state of things in UpirJiexis. It is the 

 second species of the genus found within the limits of the United States, 

 the other being the L. ricordi, a Cuban form, found in Southern Florida. 



This frog inhabits the cliffs of the cretaceous limestone which are 

 found in every direction along the borders and river valleys of the first 

 plateau region. My friend G. W. Marnock, who dicovered it, informs 

 me that after rains it is very noisy, making the rocks resound with its 

 cry, which is somewhat like a dog's bark. It hides in fissures, and is so 

 diflicult to find, as to bo generally unknown to the country people, who 

 suppose that the voice proceeds from a lizard. According to Mr. Mar- 

 nock the eggs are hatched in winter, and the tadpoles pass their exist- 

 ence in temporary pools of rain-water which collects in holes in the 

 rocks and at a distance from the creeks. 



Syrrhophus marnochii Cope, American Naturalist, 1878, p. 253. 



Char. GtEN. — Family Cjjstlgnathidce, group Hylodiiue. Xiphisternum 

 a cartilaginous plate, notched ; digits free ; vomerine teeth none ; ear 

 weU developed ; nasal bones in contact, forming a solid roof over the 

 ethmoid (lartilage. Pupil hoi'izontal. 



This genus is simply Fhyllobates with the nasal bones of Hylodes. In 

 the former genus the nasals and ethmoid have the structure seen iu Elo- 

 sia. It is probable that Fhyllohates cystignathoides m. from Vera Cruz 

 belongs to this genus, as small and probably immature specimens have 

 large and closel}^ approximated nasal bones. A third species, S. leprus 

 Cope, has been found at Tehuantepec by Sumichrast. 



Char, specif. — The typical specimen is as large as Hyla versicolor, 

 but has a large flat head and remarkably short hind legs. The muzzle 

 is flat and slightly depressed above, and projects a little beyond the edge 

 of the lip. The nostril is a little behind the apex and as far in front of 

 the orbit as the long diameter of the latter. Tympanic membrane round, 

 its diameter about half that of eye. Choauiie lateral, equal in size to the 

 ostia pharyngea. Tongue longer than wide, full, entire. Integuments 



