I 2 PERENNIBRAXCHIATA, 



Siren, Linnseus. 



Body elongated ; vomero-palatine teeth in two groups? 

 converging towards the front, but not united along the 

 median line; tongue triangular, free anteriorly and lat- 

 terally; head and neck confounded; mouth and eyes 

 small ; muzzle round ; tail compressed, its basal part con- 

 founded with the body- 

 Toes four ; color uniform, without stripes. 



S. LACERTINA. (i) 



Toes three; color not uniform; longitudinal 

 bands or stripes present.. .S. striata. (2) 



* (1) Siren Liacertina, Linnaeus. 



Synonyms, Siren operculata, Beauvois, Cuvier, La- 

 treille, Shaw, Daudin ; Siren intermedia, Le Conte, Wag- 



*For the anatomy of this animal see 61. 



