%'ii!' ] PKOCEKDINGS OF THK NATIONAL MUSEUM. C)6\) 



Natrix claikii I'xl. .iiul (iirtl. 



Begiiia rlarkii lid. and fiinl., Cat. Seipt. N. Aiiicr.. l«o:{, \>. J-; rro/iithiiolus , Inrkii. 



Cope, I'loc. Acad. I'liila., IHC.l •>. 7 1 : Cli.ck TJst Itatr. licpf. N. Aiii.r . l^T.^i, 



p. 4-2. 

 Tropidonolus mediixa Giiuthcr, Cat. Col. Siiakt-s Hrii. Miis., IS.")-^, p. 7b. 



Texan district of Au.stroriparian region, east to New Orleaii.s. 



Natrix conipressicauda Ktiiii. 



Cope, Troc. I'. S. Mus., 18f^"^, p. :U(2 ; SerotUa iomprtn8ivait(hi Ki'iiiiiiolt, rroc. Arad. 

 Phila., 1860, p. 33;"); Tropidonolus comprcHnkauditu Cope, Check List N. Aiiier. 

 Batr. Kept., 187.^), p. l^. 



Florida. 



Scales in ninetceu rows; above, Idackisb brown with nnnicrons closely ]dacod pale 



cross-bands; one row of yellow ;;nlaf spots A', c. compMolnma- 



Scales in twenty-ono rows; nunierons dark cross-hands, narrowed on the side: three 



gnlar yellow bands; a postocnlar band X. c. hiriltata. 



Scales in twenty-one rows; three rows of dorsal brown spots forininjj lonjjitndinal 



bands on neck: one row of yello\>' j^nlar sjjots; no postocnlar band. 



X. c. lomprcifniiauda. 

 Scales in twenty-three rows; yellowish, with narrow Itrown cross-bands; one yellow 



<iular band ; no postocnlar band -V. c. unlkerii. 



Natrix compressicauda compressicaiida Kenn. 



Cope, Proc. U. 8. l^at. Mus., 1SH8, p. :\'J->. 



Xvrodiit compi-easicaiidii Kenn, Proc. Acad. Phila., 1860, p. 335. 



Florida. 



Natrix conipressicauda bivittata Cope. 

 Proc. U. S. Nat. Miis. 1888, p. 3".I2 ; PI. xxvi.Fi;:. 1. 



Florida. 



Natrix compressicauda w^alkerii Yarrow. 



Tiojt\donotiix ualkerii 1'arrow, Proc. U. S. Nat. Mns., l''H3; ]>. l.M. 



The scuta of thi.s subspecies are (piite as in tiie hi.-^t, as in the form 

 of tlie rostral interna.sal and frontal plates and the relation of the orbit 

 to the superior hibials. Its chief peculiarities :ue in its twenty-three 

 rows of dorsal scales and in its coloration. In the latter it approaches 

 \hQ N. c. compsohrma. Color above, brownish yelhtw, crossed by nu- 

 inerons brown cross-bars, which are as wide as the spaces which sepa- 

 rate them, viz, two scales, :ind which extend to tlu" lirst row of sc;ih'.s. 

 These bars become wide on the part of the body near tlie lu'ad, and 

 are split by the ground color without forming bands, except short (me.**, 

 which form ;i V on the parietal i)lates. No postorbital band. Labials 

 (hisky, yellow-bordered front ; genials the same, with a large medium 

 yellow spot on each. Abdomen dusky, with a median row of rouml 

 yellow spots, which soon become irregular in number aiul i>osi- 



