CROCODILIANS, LIZARDS, AND SNAKES. 697 



lihiiwijhida'. 



RMnoplm oxyrhynchus Schneider. One large left lung and very small (.3 mm.) right 



lung; no tracheal lung. Contrary to the statement of Stannius above ({uoted, as in 



Colubroidea generally. 



ASINEA. 



Peropoda. 



I. Two well-developed lungs of iine([uai size; no tracheal lung. 



I'ythonida'. 



Pylhon re(/iii8 Shavr; P. molurus Liinmeus; P. spilotes Liace-pedo; Loxocemus hicolor 



Cop.'. 



Boidw. 



Xiphosoma caninum Linnaeus; Epicrates cenchria Linnjeus; Chilahotlirns inornatus 

 Eeinhardt; Boa constrictor Linm&us; Eunectes murmiis hinnvens; Eryx Johnii Russell. 



Chariiiidw. 



Besides the absence of coronoid and supraorbital and postorbital bones, this family 

 differs from the Boidas in the fusion of the nasal bones into a single plate. Charina 

 bottw Blainville. 



II. One lung, without rudiment of a second; a tracheal lung extending from true 

 lung, with which it is continuous, to throat. 



Unf/alUdce. 



I'ngaJia maculata Bibrou; U. melanura Gray. 



Colubroidea. 



I. Two Avell-developed but unequal functional lungs. 



Xeuopeltida. 

 XenopeUis unicolor Keinwardt. 



II. One functional lung only ; the right rudimeutal lung sometimes possibly with 

 limited function. 



Colubridce. 



LYCODONT1N.E. 



Lycodon aulicus Linn;eus ; Boodon infernalis Giinther ; Urechis microlepidotufi Peters ; 

 Stenorhina ventralis Dum< ril and Bibron. 



COLUBElNiE. 



Elapops modestus Giinther; ^ Coronella jjirundica Daudin; Bluodon semicnrinatus 

 Cope; Eicimia oHvacea Gray; SaJvadora huirdii Jan; Pityophi)* sayi Holbrook; Ejn- 

 glottophis plenrostictus Dum^ril and Bibron; Spilotes corain Cuvier; ^. puUatiia 

 Linna'us; Coluber qitadriliueatus Pallas; C. obsoletits Say; C. quadririftatiis Holbrook; 

 Zamenis constrictor Linna'us; Z. fat/ethim Catesby ; Z. mentovarinm Dumoril and 

 Bibron; Z. atrorirens Shaw; Z. korros Linnseus; Cyclophis (vsticus Linnteus; Dry- 

 mobius pantherinns Merrem; D, boddcertli Sentzen; D. margarili/erus Schlegel; 

 Crossanthera melanotropis Cope; Tferpetodryas earinaius Linnteus; Leptophis pnvstana 

 Cope; L. me.ricaniis Dum6ril and Bibron; L. smaraydlnus Boie; Dendrophis picta 

 Linnaeus; Dasypeltis palmarum Leach. 



OIPSADINiE. 



Dipms blandingii Ilallowell; Himantodes gemmisiratus Cope; Bhinobothrynm levtigi- 

 nosiim Scopoli ; Trimorphodon bisciitatus Dunicril and Bibron; Sibon septentrionale 

 , Kennicott; Malpolon Jacertinum Wagler; Clonophis kirtlandii Hallowell; Dryophis 

 fulgida Daudin; Passerita mycterizans Linnaeus. 



1 Position uncertain ; perhaps a Lycodontine. 



