1894.] '^'^1 [Cope. 



Gyclopliis cesfivus L. ; Drymobias pantherinus Merr. : D. bodcheriii Seeiz. ; 

 J), margari'iferus Schl. ; Orossanthera mclanotropis Cope ; Herpetodryas 

 carinatus L. ; Leptoplds prmstans Cope; L. mexicanus D. and B. ; L. 

 smaragdimis Boie. ; LendropJiis picta L. ; Dasypeltis jyalmarum Leach. 



Dipsadinse. 



Dipaas. llandii^gii Hallow. ; Eimantodes gfmmistrntus Cope ; Rhinoho- 

 tTryrum lentiginnsum Scop. ; Trimorphodon biscutntus D. and B. ; Sibon 

 septentrionale Kenn. ; Malpolon lacertinum ^Vagl.; CladopMs kirtlandii 

 Hall ; Bryojihis fulgkla Daud. ; Passerita mycterizans L. 



Chn'sopeleinoe. 



Chrysopelea ornatn Shaw. 



Xenodontinse. 



Caiostoma badium D. and B. ; Farancia abncura Holbr. ; Abastor 

 erythrogrammus Daud. ; Opheomorphus fufcus Cope ; Belicops angulatus 

 Linn. ; H. baliogaster Cope ; Dromims parvifrons Cope ; HalsopMs leu 

 comelas D. and B. ; Xenodon rliabdocephalus Wied. ; X angustirostris 

 Peters; LystropMs dorbignyi D. and B. ; Heierodon 7iasicvs B. and 6-.; 

 H. platyrhinus Latr. ; Ilypsirhynclms ferox Gthr. ; Uromacer oxyrhynchus 

 D. and B. ; U. catesbyi D. B. Right lung larger in Uromacer. 



Scytalinae. 



Uydrocalamus qrtinquevittatus D. and B. ; Erythrolamprus venustissimus 

 L. ; E. JisKideiisGihr. ; Oxyrrhopns plumbeus L. ; 0. fitzingeriii&n. ; Cono- 

 phi9 pulcher Cope ; G. sumichrastii Cope ; Manolepis nnsutus Cope ; Jaltris 

 dorsalis Glhr. ; Philodryas viridinsimus L. ; P. olfersii h\cht. 



Natricinfe. 



Generally a proximal auricle or pocket. Eutmnia proxima Say ; E. 

 sirkilis L., s. s. sirtalis, obacura and parietalis; Natrix fasciata L. ; N. 

 rhombifera Hallow. ; N. taxispilota Holbr. 



Appendix to Colxibridm. 



In the ATrican Thrasops flavigularis Hallow, the right (rudiniental) 

 lung measures 5 mm. The trachea is enormously expanded transversely, 

 simulating a tracheal lung, but its inferior wall contains the tracheal car- 

 tilages which extend its entire width, and it contains no cells or trabeculse. 

 An artery with lateral branches extends its entire length, which is from 

 the posttracheal lung to the throat. This character distinguishes this 

 genus from Leptophis. 



In the following species I found no trace of the right lung. 



Colubrinse. Rhinocliilus lecontei B. andG. ; Cemophoracoccinea Bhim.; 

 Ophiboliis dolintus L. ; 0. getulus L.; Pityophis melanoleucvs Daud. 



Xenodontina;. IlaUophis angulifer D. and B.; B. vudii Cope. 



