412 ROMEROLAGUS. 



and jugals elongated posteriorly; clavicles articulating with sternum 

 and scapula; prosternum broader han long before first pair of ribs; 

 mesosternum of three segments; six pair of ribs articulating with 

 sternum; fifth cervical vertebrae with transverse process directed 

 outward, not backward; transverse process of lumbar vertebrae 

 broadly expanded; small hypopophyses present on first three lumbar 

 vertebrae; inferior crest of navicular bone short and not produced 

 under base of metatarsal. (ex Merr., 1. c.) 



FlG. 79. ROMEROLAGUS NELSONI. 

 No. 57949 U. S. Nat. Mus. Coll. Nat. size. 



427. *nelsoni (Romerolagus) , Merr., Proc. Biol. Soc. Wash., x, 1896, 



P- i?3- 

 diazi. (Lepus}, Ferrari-Perez, Cat. Comis. Geogr. Explor. Repub. 



Mexicana, 1893, pi- 4 2 - 

 NELSON'S HARE. 



Type locality. West slope of Mt. Popocatepetl, State of Mexico, 

 Mexico. Altitude, 10,000-12,000 feet. 



* It is a moot question whether this species should not bear the name diazi 

 instead of nelsoni, the figure on plate 42 of the Catalogue above cited represent- 

 ing undoubtedly this species. It is said that a description was a'.so published 

 in a Mexican newspaper. The figure in the plate gives a better idea of the ani- 

 mal than can be obtained from any description. 



