642 ADDENDA AND CORRIGENDA. 



Page 259. Contia agassizii. 



Is an OpisthoglyphoTis Snake. See this volume, p. 126 (Pseud- 

 ahldbes agassizii). 



^^^ . Page 261. Coatia coUaris. 



Ir-m. S (Sc. 17 ; V. 171 ; Tiflis. Tiflis Mus. [E.]. 



C. 62) & 2 (Sc. 17; 



V. 176 ; 0. 57). 

 n-o. S (Sc. 15 ; V. 150 ; Aresh, Gov. Elizabetli- Tiflis Mus. [E.]. 



0. 58) & 2 (Sc. 15; pel. 



V. 157 ; 0. 54). 

 p. 2 (Sc. 17; V. 160; 0. Mt.Hermon, Palestine. Turin Mus. [E.]. 



59). 



Page 273. Add a genus : — 



101a. SYMPHIMUS. 

 Symphimus, Cope, Proa. Amer. Philos. Soc. xi. 1869, p. 150. 



Apparently agreeing with Ghilomeniscus, but rostral shield not 

 prominent. 

 Mexico. 



1. Symphimns leucostomns. 



Symphimus leucostomus, Cope, I. e. 



Snout obtusely pointed. Rostral as deep as broad, scarcely 

 visible from above ; suture between the internasals as long as that 

 between the prsefrontals ; frontal longer than broad, with concave 

 sides, much shorter than the parietals ; one prse- and one or two 

 postoculars ; temporals 1 + 2 ; seven upper labials, third and fourth 

 entering the eye ; anterior chin-shields a little longer than the 

 posterior. Scales in 15 rows. Olive-grey above, with a light 

 brown vertebral stripe three scales wide ; lips light yellow ; belly 

 dirty white. 



Total length 800 millim. ; tail 250. 



Chihuiatan, Tehuantepec. 



^^^ . Page 276. Homalosoma lutrix. 



p-u. S (V. 119, 116, 113 ; Uganda. F. J. Jackson, Esq. 



C. 27, 31, 34) & 2 (V. [P.]. 



134, 122, 126; C. 23, 

 19, 22). 



The head-shields vary considerably, and H. sMranum should be 

 united with H. lutrix. 



