33. PITUOPHIS 715 



1 59. Pituophis catenif er heermanni (Hallowell) 



VALLEY GOPHER-SNAKE 



Plate 75 



Pityophis Heermanni HALLOWELL, Proc. Acad. Nat. Sci. Phila., Vol. 



VI, 1853, p. 236 (type locality, Cosumnes River, California). 

 Pityophis vertcbralis HALLOWELL, Rep. Pacific R. R. Surv., Vol. X, 



1853, Pt. IV, p. 14. 

 ? Pituophis Wilkesii LORD, Naturalist Vancouver Island, Vol. II, 1866, 



p. 307 (part). 

 Pityophis sayi bellona YARROW, Bull. U. S. Nat. Mus., No. 24, 1883, 



p. 106 (part); TOWNSEND, Proc. U. S. Nat. Mus., Vol. 10, 1887, 



P- 239 (?) 

 f Pityophis catenifer TOWNSEND, Proc. U. S. Nat. Mus., Vol. 10, 1887, 



P- 239- 

 Pituophis cateni/er VAN DENBURGH, Occas. Papers Cal. Acad. Sci., V, 



1897, p. 195 (part). 

 Pityophis catenif er catenif er BROWN, Proc. Acad. Nat. Sci. Phila., 1901, 



p. 53 (part). 

 Pituophis catenifer catenifer GRINNELL & CAMP, Univ. Cal. Publ. Zool. 



Vol. 17, No. 10, 1917, p. 193 (part); VAN DENBURGH & SLEVIN, 



Proc. Cal. Acad. Sci., Ser. 4, Vol. IX, 1919, p. 211 (part); DICE, 



Univ. Cal. Publs. Zool., Vol. 16, No. 17, 1916, pp. 303, 307, 308, 



3io (?). 

 Pituophis cdtenifer heermanni VAN DENBURGH, Proc. Cal. Acad. Sci., 



Ser. 4, Vol. X, No. i, 1920, p. 16, pi. i, fig. 2. 

 Pituophis catenifer deserticola BLANCHARD, Copeia, 1921, No. 90, p. 5. 



Description. Head somewhat flat-topped, with snout 

 projecting and rather narrow. Temporal regions not swol- 

 len. Rostral plate very large, prominent, not very narrow, 

 often recurved between internasals on top of snout; bounded 

 behind by internasal, anterior nasal, and first labial plates. 

 Plates on top of head are a pair of internasals, a variable 

 number of pref rentals (normally four), a frontal, supraocu- 

 lar of each side, and a pair of parietals. Anterior and post- 

 erior nasals usually distinct. Loreal usually elongate. Pre- 

 oculars usually two, occasionally one. Postoculars normally 



