698 REPORT OF NATIONAL MUSEUM, 1898. 



CHKVSOPKLEIN^.. 



Chrysopeha ornata Shaw. 



XENODONTIN^. 



Catostovia hadium Dumeril and Bibrou; Farancia abacura Holbrook; Ahastor ery- 

 throgrammus Daudin; Ophiomorplmn fuacua Cope; Helicops angulatus Linnseus; H. 

 baliogaster Cope; Dromicus parvifrons Cope; HahopMs leucomelas Diimoril and 

 Bibron; Xenodon rhabdocephalus ^Yied; X. angustirostris Peters; Lystrophis dorbignyi 

 Dumdril aud Bibron ; Heterodon wasic^s Baird and Girard; iJ. p?a<yr/;mMS Latrei lie; 

 Hypsirhynchus ferox Giinther; Uromacer oxyrhynchus Dum^ril and Bibron; U. catesbyi 

 Dam6ril and Bibron. Right lung larger in Uromacer. 



aCYTAIANM. 



Hydrocalamus quinquevittatus Dum6ril and Bibron; Erythrolamprus vennatiseimus 

 Linn.TBUs; E. fissidens Giinther; Oxyrhopus plumbeas Linnaeus; 0. fitzingerii Jan; 

 Conophis pulcher Cope; C. sumichrastii Cope; Manolepis nasutus Cope; laltris dorsalis 

 Giinther; Philodryas v iridissimus IjinnseuB; F. oC/cj-sm Lichtenstein. 



NATRICIN^. 



Generally a proximal auricle or pocket. Eutcenia proxima Say ; E. sirtalis Linnseus, 

 8. 8., sirtalis, obscura, Sbudparietalis; Natrix fasciata Linnseus; N. rhombifera Hallowell; 

 N. taxiapilofa Holbrook. 



Appendix to Colubridw. 



In the African Thrasops fiavigularis Hallowell the right (rndimental) lung measures 

 5 mm. The trachea is enormously expanded transversely, simulating a tracheal 

 lung, but its inferior wall contains the tracheal cartilages, which extend its entire 

 width, and it contains no cells or trabeculte. 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: 



ColubriucE. Ehinochilus lecontei Baird and Girard; Cemophora coccinea Blumen- 

 bach; Osceola doliata Unmsns; 0. getulus L,inniBns; Pityophis nielanoleucus Daudin. 



Xenodontinae. HalsopMs anguUfer Dumoril and Bibron; H. vudii Cope. 



LeptognathiutB. I propose this subfamily as distinct from the Xenodontinse, on 

 account of the presence of a large tracheal lung which is continuous with the nor- 

 mal lung, and with the trachea, and extends to the throat. Lepiognaihus nebulatus 

 Linnseus; L. garmanii Cope. 



Scytalinae. Tachymenis strigatus Giinther; Phalotris lemniscatus Uum^ril and 

 Bibron; P. tricolor Dumoril and Bibron; Erythrolamprus bipunotatus Giinther. 



Natricinse. Cerberus bowformis; Pseudasjjis carta Linnaeus. 



Acrochordtdoe. 



Chersydrus granulatus Merrem. In this species the heart is at the middle of the 

 length of the body, and the normal lung is posterior to it, extending nearly to the 

 vent. No rudimental lung. A tracheal lung, composed of coarse cells and without 

 lumen, extends from the heart to the head, and is discontinuous with the true lung. 

 The trachea is closed, but communicates with the tracheal lung by a series of sym- 

 metrical pores on each side. 



Xajidcp. 



One lung and a rudiment; no tracheal lung. Paeudechis porphyriacus Shaw; 

 IHem,enia reticulata Gray; Xaja tripudians Linnseus; Bungarus semifasoiatus Kuhl. 



Elapidce. 



No rndimental nor tracheal lung. Elaps lemniscatus Linnseus; E. fulvius Linnseus; 

 E. corallinua Linnseus; E. multi fascial us Jan. 



