SV. EXPEDITIONEN TILL MAÜELLANSLÄNDERNA. BD. II. N:0 6. 145 



Brown above. Upper sarfaee of head with dark, indistinct 

 raarkings, upper labials and rostra! yellowish white, with a dark 

 upper border. The chin white, with blackish grey spots. A light 

 streak on each side of the back, oonsisting of two rows partly 

 white seales, runs from the temples to the beginning of the tail, 

 where they dissapear. Two other similar but more distinct 

 streaks run lower down on the sides of the body from the white 

 sides of the neck to the end of the tail. The ventral shields 

 yellowish white, with darker markings. On the throat the dark 

 colour becoraes more distinct and nearly black. 



Althongh this snake on the whole completely agrees with the 

 genus Philodryas, I refer it, however, with doubt to this genus 

 on the ground of the structure of the poison-teeth. In all the 

 species of the genus Philodryas, examined by nie, I found these 

 teeth provided with very deep and distinct grooves, but in this 

 specimen the grooves are very much shallow and slightly distinct. 

 It is possible, however, that it may be only an individual Va- 

 riation. 



This snake differs from the description of Philodryas Bur- 

 meisteri (Jan) in Boulenger's Catalogue of Snakes, from which 

 form it possibly might be found not to be specifically distinct 

 by shorter loreal, slwrter internasals, and shorter tail, beside 

 which the maxillary teeth are fewer. 



One specimen from Puerto Madryn, Patagonia, 10 /n 1895. 

 It lives in sandy places and is according to Statement on the 

 label by no means rare. It has but lately swallowed a lizard. 



Total length 800 mm. Tail 220 mm. Sc. 23. V. 207. 

 A. 1. C. 113. 



Lizards. 



Homonota Darwin i Boulenger. 



(Boulengek, Cat. of Liz. I, p. 21. 18b5.) 



4 specimens from Puerto Madryn, Patagonia, 6 /u 1885. 

 According to Statement on the label this lizard lives in 

 sandy places and was generally found under boards, stones, of 



10 



