182 ENCRINUS, ESOX. 



in the middle of the base ; branches eylindricj 

 with rings. Common petrifaction. 



See MS. P. 



8 8. EPHEMERA. Spec. 21. 



vulgatd) (ephemera, day-fly,) wings reticulate, 

 spotted with brown ; body yellowish, spotted 

 with black ; having three threads at the end of 

 the abdomen. Species communis of some au- 

 thors. It appears by millions, ascending and 

 descending, for a few days. 



See MS. P. 



4 3. EQUES. Spec. 2. 



americanus, rays of the first dorsal-fin elongated ; 

 teeth smooth ; the floating vesicles large. 



See MS. P. 



1 6. EQUUS. Spec. 6. 



caballus 9 (horse,) hoofs solid ; mane and tail with 

 long flowing hair. 



liemionus, (wild mule,) hoofs solid ; colour uni- 

 form, no cross on the back ; tail hairy at the 

 tip only. 



asznus, (the jack,) hoof solid ; tail bristly at the 

 extremity ; a black cross on the shoulder of the 

 male. 



See MS. P. 



13, ERINACEUS. Spec. 6. 



europteus, (hedgehog,) ears rounded ; nostrils with, 

 a loose flap. About ten inches long. 



See MS. P. 



4 4. Esox. Spec. 15. 



Qsseus, (bill-fish, sea-pike,) upper jaw longer ; 

 scales bony ; tail quadrangular. 



