\ i»\ r i; ri - I. M I \ i 



Thi presenl work i- published l>\ the Smithsonian Imstiti mon hi oo- 

 tion with tin- Museum <>\ Comparativi Zoology, Cambridge, Mass., 

 the 'i; ir the plates having been made ;it 1 1 * * • expense of thai estab- 



lishment. 



This work baa been recommended by Mr. Ai.kxwdii; A.gassiz. 



In accordance with the rule of the Institution, requiring the formal approval 



by selected experts >>i everj Memoir offered for publication in (lie Smithsonian 



"Contributions to kti<>\\li'L r >-. it was submitted for examination t<> Chablxs 



A Win i h. and to William II Dall; by whom it was also Btronglj com- 



mended, ami it has been accordingly accepted for publication in thi 



• < iontributions." 



- P LANGLEY 



i tution. 



SMITIIM>XI \n In-! II r ti,.\. 



