396 



PLAGIODONTIA. 



slightly smaller, with one external and two internal loops, the angle 

 on latter much shallower than the others;, lower incisors enter jaw 

 to base of last molar. 



414. aedium (Plagiod ontia) , F. Cuv., Ann. Scien. Nat., 2me Ser., vi, 



1836, p. 347, pi. 17, Zool. 

 HAITIAN HUTIA. 



Type locality. Island of Haiti. 



Geogr. Distr. Island of Haiti. 



Genl. Char. Those of the genus. 



FIG. Llll. PLAGIODONTIA AEDIUM. HAITIAN HUTIA. 

 ex Ann. Scien. Nat., Paris, 1836, PI. 17. 



Color. General hue pale brown; hairs on upper parts gray for 

 three-fourths their length, and fawn at the tips; long black hairs are 

 intermingled with the others; hairs of under parts are paler than 

 those of the back, and the long hairs are whitish; tail naked, scaly; 

 incisors yellow. 



Measurements. Total length, 425; tail, 125. Skull: occipital 

 region imperfect ; posterior border of frontal to end of nasals, 5 2 ; 

 interorbital constriction, 19; zygomatic width, 42; length of nasals, 

 23.5; length of upper molar series, alveolar border, 21; length of 

 mandible, angle to alveolus of incisor, 48; height at coronoid process, 

 23; length of lower molar series, alveolar border, 22. 



Of the Family of "fretful porcupines," the semi-arboreal species 

 of the genus ERETHIZON are found in North America. They prefer 

 a cold climate, and if their lot is cast in tropical lands .such as Mexico, 



