THE BATIIACIIIA OF NOUTll AMERICA. 



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pliiM t'xleiuls from this to tlio guhir, iiiclosiii{( an ovate tMilargcd area, 

 Mini a sln)rt one to the orbit incloses a postorbital siibroiind and smaller 

 ai'iM. 



'riiciMnnniissureof the mouth is more undulate in males than in lemales, 

 liiit both present a slight elongation of the symphysis, produced exter- 

 II illy by a pad of crypts. The M'idth of the head enters the length 

 .").(>(! times. The vomerine teeth are often wanting, and when present 

 iiie minute and few. Their basis is a ridge, whi(!h extends from behind 

 (lie middle of the posterior nares Jicross the palate with a posterior con- 

 vexity. The parasplienoid patches are small and not in contact; they 

 do not extend to opposite the middle of the orbits. 



The median toes are elongate, and as in I). orliroplKva ; they fail to 

 meet by four interspaces when pressed to the side. The tail has a char- 

 acteristic form, which is invariable at all periods; near the base the sec- 

 tion is trigonal ; the dorsal keel increases in elevation and becomes a 

 narrow tin i»osteriorly ; the extremity is attenuated. Its length is just 

 ecpial to that of the remainder of the animal. 



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VVi.ix. Demiwfjnathtis /iinyjt fituca. No. 40. (^arli.sle, Pa. -, f. 



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There are two color varieties, which blend together so as to indicate 

 that no higher value can be attached to them ; one of these is the Sala- 

 iiKtniIra aKricidata of llolbrook. 



AImim- Itiown, Willi ^r.iy an<l iiinksliiuh'S ; widcs iiiid belly iiiiirblcd, the pale predoiii- 

 iiiatinjf ; no red .sjiots on sides xur.fnsca. 



Aliove and Hides black; llit^ latter with a .series of .small fed wpoLs; a red spot IVoin 

 eye to eantliiis of mouth, present or absent ; belly marbled, the dark itredominat- 

 iu'^ var. aiiriciilata. 



The latter variety occurs only in the Southern States; the tubercle 

 of the angle of the eye and the upper lateral i)ores are often better 

 developed in it than in var. Fiisca, therefore api»roachiiig I), nigra. It 

 is, however, easily distinguished from the latter. Sundry si)ecimeus 



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