412 ROMEROLAGUS. 
and jugals elongated posteriorly; clavicles articulating with sternum 
and scapula; prosternum broader than long before first pair of ribs; 
mesosternum of three segments; six pair of ribs articulating with 
sternum; fifth cervical vertebre with transverse process directed 
outward, not backward; transverse process of lumbar vertebreze 
broadly expanded; small hypopophyses present on first three lumbar 
vertebre; inferior crest of navicular bone short and not produced 
under base of metatarsal. (ex Merr., 1. c.) 
FiG. 79. ROMEROLAGUS NELSONI. 
No. 57949 U.S. Nat. Mus. Coll. Nat. size. 
427. *nelsoni (Komerolagus), Merr., Proc. Biol. Soc. Wash., x, 1896, 
| Soe alle 
diazt. (Lepus), Ferrari-Perez, Cat. Comis. Geogr. Explor. Repub. 
Mexicana, 1893, pl. 42. 
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 diazt 
instead of nelsont, the figure on plate 42 of the Catalogue above cited represent- 
ing undoubtedly this species. Itis said that a description was also 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. 
