PLATE XXVIII. 



Fig. 1. OrnhiJcUd Whitmaui. nat. size. 



Fig. 2. (h-<ihth'Ila Ijiiiinï. iiat. size. 



Fig. 3. ôjiihih'IIn octmimin. iiat. size. 



Fig. 4,0,6. Head of O/v;/»,/.-//./ WJikuuini. x 3. 



Fig. 7, 8. Hind end of OmJiil. Wldtinmü. x 3. k, amis. 



Fig. 9, 10. Head of ()rnh,l. fjiuuu. x 3. 



Fig. 11. Head of Omlul. <ict(ni<ii}<i. x 3. 



Fig. 12. Hind end of Omhil. nctonarut. x 3. 



Fig. 13. Head of a lar^e specimen of Orohd. actnjinrin. nat. size. 



Fig. 14. Hind end of tlie same. nat. size. 



