Tertiary Mammals. — Eyerman. 163 
LAGOMYTD^:. 
The genus Lagomys has by far the besc representation in 
the collection, numbering no less than several hundred 
specimens, representing three distinct species. The genus 
was named by Cuvier* as early as 1798, although Pallasf 
described Lepus (Lagomys) pusillus twenty years earlier. Va- 
rious names have been given to a number of specialized t3 r pes 
based principally upon the size or the presence or absence of 
the penultimate premolar. 
Lagomys sardus Hensel.^ 
Somewhat larger than the existing species pusillus. As is 
the case with most of the other species, the entire collection 
of this species is in a most beautiful state of preservation. L. 
sardus is from the ossiferous breccia of Mont. St. Giovanni, 
near Iglesias, Sardinia. The following are represented : Max- 
illa, mandible, cranium, scapula, humerus, radius, ulna, meta- 
carpals, phalanges, femur, tibia, metatarsals, vertebra', astrag- 
alus, calcaneuni, navicular, cuboid. 
L. sardus corsicanus. 
This is L. Corsica mis of Giebel, but is apparently so near 
sardus that it cannot stand alone as a distinct species. Rep- 
resented b}* the humerus, scapula, tibia, and metatarsals, from 
the superior stratum of the upper chamber of Grotto Pietro 
Tamboni, Tavolara. This variety also occurs in the ossifer- 
ous breccia of Toga, near Bastia, Corsica, and is repre- 
sented by the mandible with complete dentition, cranium, 
scapula, humerus, ulna, femur, tibia, meta-tarsals, osilium. 
L. meyeri Tschudi.§ 
Represented by maxilla, mandible, humerus, femur, meta- 
carpals, astragalus, calcaneum, tibia, phlanges, metatarsals, 
deciduous-molars. Grive St. Alban. 
L. ceningensis v. Meyer. j| 
This is the largest species of the genus in the collection and 
*Tab. Elem. d'Hist. Nat,, p. 132. 
tNov. Com. Pet., vol. xiii, p. 531. 
JZeite. deutsch. geol. Ges., 185G. vol. viii, p. 689. 
§H. von. Meyer, Foss. Saugth. etc., von (Eaingec 1845, p. 7. 
Xeues Jahr., 1836, p. 58. 
