Reptiles and Batrachians from Brazil. 87 



*4. Mahuya dorsivittata^ Cope. 



Originally described from Paraguay. Specimens from 

 Uruguay are also in the Natural-History Museum. 



Ophidia. 



*5. GeopMs reticulatus, sp. n. 



Internasals not larger than postnasals ; frontal broader 

 than long ; no preocular ; two postoculars ; seven upper 

 labials, third and fourth entering the eye ; temporals 1+2. 

 Scales in fifteen rows. Ventrals 156 ; caudals 26. Pale 

 brownish above, each scale edged with dark brown ; an ill- 

 defined dark brown collar ; lower surfaces uniform whitish. 

 Head and body 315 millim. ; tail 40 raillim. 



A single specimen. 



*6. Ablabes Agassizii (Jan). 



Eirenis Agassizii, Jan. 



Several specimens, representing two varieties of coloration. 

 One is olive-grey, with the bands along the body very indi- 

 stinct ; the other is brown on the sides, with a whitish black- 

 edged streak on each side of the back, which is brick-red 

 between them. A specimen from Uruguay in the museum 

 agrees perfectly with Jan's figure. 



7. Tomodon dorsatus, D. & B. 



8. Herpetodryas carinatus (L.). 



*9. Leptognathus ventrimaculatus^ sp. n. 



Plabit moderately slender, compressed. Internasals not 

 half the size of the prefrontals ; frontal as broad as long, 

 about two thirds as long as the parietals ; nasal undivided ; 

 loreal not twice as long as high, largely entering the eye ; a 

 small preocular may be present above the latter shield ; two 

 postoculars, upper largest; six upper labials, fifth largest, 

 third and fourth entering the eye ; lower labials eight, five 

 anterior in contact with chin-shields ; temporals 1 + 2. Scales 

 smooth, in fifteen row^s, the vertebral enlarged, hexagonal. 

 Ventrals 156 or 161 ; caudals 45 or 48. Body with blackish- 

 brown, large, transverse spots, or with two alternating series 

 of such spots, sei)arated by narrow pale brownish or whitish 

 intervals ; head blackish brown, veined with brownish white ; 



