1885.1 10d [Cope. 



the ninth or median row of the ground color. These lines are quite indis- 

 tinct. Ends of the gastrosteges of the ground color, shaded with bluish, 

 so as to give the color border a serrate outline. Under surface of body 

 and tail yellow, immaculate. Top of head paler. The frontal plate with 

 dark edges and some dark specks on the prefrontals. A pair of light 

 dark-edged small spots, close together, one on each side of the common 

 parietal suture. Superior labial dark-edged. Lower labials and adjacent 

 plates obscurely speckled. 



Near the head the dorsal lines unite and form a serrate dorsal band, 

 which is separated by a paler band from a darker lateral band with the 

 superior edges serrate ; but these markings are obscure. In another spe- 

 cimen which Prof. Steere, of Ann Arbor, brought from the Purus river,* 

 the dorsal band is more distinct and extends to the end of the tail. 



I originally referred this species to (Lygophis) Aporophis, but its equal 

 teeth exclude it from that genus. 



Opheomorphus meleagris Shaw. 

 HelicOps angulattjs Linn. 

 Oxyrrhoptjs scolopax Klein. 



DlPSAS CENCHOA L. 



Rhinobothyrum lentiginosum Scop. 

 Leptognathus catesbyi Weigel. 

 Leptophis marginatus Cope. 

 Dryiophis argenteus Daud. 

 Elaps lemniscatus L. 

 Bothrops brasilensis Latr. 



* This collection was made at Canutama, a distance of six hundred miles, and 

 at Marrahan, a distance of seven hundred miles above its mouth on the Purus 

 river, and as the first indication of the reptile fauna of that region possesses 

 considerable interest. It includes the following species: 1. Liophis almadensis 

 Wagl. ; 2. Rhadincea nicaga Cope; 3. Pseudoeryx callosticlus Gtlnth (Hydrops); 

 4. Tortrix scytale Linn; 5. Bufo apua L. ; 6. Hyla leucophyllata var. Beir; and 

 7. Lithodyles cinereus sp. nov. This frog has a smooth belly and free toes 

 with truncate pallettes on all the digits. There are no cranial crests, and but 

 slight traces of dorsolateral dermal folds. The vomerine teeth are in J-shaped 

 patches commencing opposite the posterior border of the choanal, and curv- 

 ing inwards and backwards. Ostia pharyngea as large as choanse. Nostril 

 terminal. Tympanic drum round, two-thirds size of eye. Tongue oval, 

 slightly notched behind. Head oval; muzzle truncate; lores straight, 

 grooved; canthus rostralis distinct, straight. Heel of extended hind leg to end 

 of muzzle. First finger longer than second. A prominent sharp metatarsal 

 tubercle attached to base of first toe. No external tubercle. Color above gray, 

 with pale brown markings. The most distinct of these is a cross-band between 

 the orbits. Lower surfaces dirty-white; concealed surfaces brown. Upper lip 

 with three yellowish spots extending from the orbit; to which two or three 

 marks on the lower jaw correspond. Limbs faintly brown cross-banded. Length 

 of head and body M. .053: width of head at tympana .018. Length of fore-leg 

 .029; of hind leg .0S4 ; of hind foot .038. 



