242 



BRANCH CHORDATA 



The author attracted the attention of a charmed bird from its 

 gaze upon the snake and the bird immediately flew away. 



The poison gland is an esjx'cially modified salivary gland, and 

 the poison fangs are maxillary teeth which have a furrow on the 



Fig. 198. A case of mimicry, where a non-venomous species of snake re- 

 sembles a venomous one. (Romanes.) 



anterior side, or the furrow is changed into a canal for the pas- 

 sage of the poison to the end of the fang, and hence to the 

 deepest portion of the wound, where it poisons the blood of the 

 victim. Colton gives, as an antidote, a 10 per cent, solution of 

 ammonium carbonate taken internally. 



