CROCODILIANS, LIZARDS, AND SNAKES. 



785 



elongated, tapering posteriorly, and subtruucated. Prefrontals sub- 

 rounded ; intcrnasals smaller than prefrontals by about one fourth. 

 Eostral rounded, broader than high. Nostril in the middle of the nasal. 

 Loreal subtrapezoidal. Anteorbital angular, much broader above than 

 belou. Postorbitals subangular, lower one the smaller. Superciliary 

 well developed, irregularly oblong. A large, narrow first temporal 

 shield, and two large ones following. Upper labials seven; sixth 

 slightly the largest. Lower labials eight; fifth the largest. Posterior 

 mental scutellse slender and elongated, extending beyond the fifth 



Fig. 170. 

 Cyclophis ^stivus Linn^us. 



r=l. 



Fort Macon, North Carolina. 



Cat. No. 114(11, U.S.N.M. 



lower labial. Scales subelliptically elongated, strongly carinated ex- 

 cept the outer row, which is perfectly smooth, and the second row, 

 which is but slightly carinated. These two external rows are broader 

 than the rest, especially the outermost. 



Baird and Girard give the following scutal formulae and measure- 

 ments, the latter in inches: 



Gastrosteges. Urostegea. Length. Tail. 



Anderson, South Caioliua 157 -fl. 130. 25^^. 9f. 



Do 154 + 1. 134. 24. 9f. 



Kemper County, Mississippi 154 + 1. 128. 27|. 10|. 



Do 154 + 1. I2;t. 25. 10. 



Virginia 1.54 + 1. 126. 33i. 8|. 



Anne Arundel County, Maryland 155 + 1. 135. 21|. 8^. 



Indianoia, Texas 163 + 1. 111. 29|^. 10. 



Do 156 + 1. 113. 28J. lOi. 



Red River, Arkansas 163 + 1. 111. 28^. 9}. 



New Braimfels, Texas 154 + 1. 115. 23f. 8f, 



The number of scale rows I found to be constantly seventeen in 

 thirty-two specimens examined, as also the superior labial i)lates, which 

 are always seven. The loreal plate I found rudiniental on one side 

 of one specimen, and once confluent with the nasal on one side only, as 

 is sometimes the case on both sides in Liopeltis vernalis. I found two 

 preoculars on one side in two specimens only. In one there are anom- 

 alously three on both sides (Cat No. 1447). In the same specimen there 

 are two loreals, one above the other, on both sides. In three specimens 

 there is but one temporal of the second row on both sides, and in those 

 there is one of the second row on one side only. The length of the 

 NAT MUS 1)8 50 



