SIMPLICIDENTATA 



535 



4. Lisduff. Cavan. Hon. B. E. B. Fit/. 7G. 11. 18. 1-2. 



Patrick (c & p). 77. 1. 18. 1-2. 



2 6, St. Rathrobbiii, King's County. Col. M. W. Biddulph 98. 2. 10. 1-2. 



(c & p). 



St. Donabale, Dublin. Charles Cobbe(c&p). 82.2.4.1. 



{Type of L. lutesccns Barrett- 

 Hamilton.) 



.'!. Kilmanock, Watorford. G. Barrett-Hamilton 99. 2. IG. 1-3. 



(c & P). 



2 .?, 9. Kilinanook, Waterford. G.Barrett-Hamilton 9.12.1-5.1-3. 



(c & p). 



t<, 9. Waterford. G. Barrett-Hamilton 9. 10. 4. 1. 



(c & p). 8.2.27.1. 



1. Bangor, Carnarvonshire, G. W. Assheton 3.1.28.1. 

 Wales. Smith (c & p). 



8ub-0rder SIMPLICIDENTATA. 



1891. Simplicidentata Flower and Lydekker, Mammals, Living and 

 Extinct, p. 448. 



Geof/rajihical tlistrihiition. — Same as that of the order 

 liodentia. 



Characters. — Upper incisor.s 1-1, their enamel covering not 

 extending to posterior surface ; distance between mandibular and 

 maxillary tooth-rows approximately equal, both pairs of rows 

 capable of opposition at the same time, the primary motion of 

 the jaws in mastication longitudinal or oblique ; premolars never 

 more than jif ; incisive foramina moderate or small, not confluent 

 posteriorly ; bony palate never reduced to a narrow bridge 

 between premolars ; facial portion of maxillary entire ; fibula 

 not articulating with calcaneum. 



Kemarlcs. — This suborder contains the vast majority of exist- 

 ing rodents, among which about twenty families ai-e now recog- 

 nized. Eight of these occur in Europe (for kej's see pp. 481-483). 



Family ZAPODID^. 



1875. Za2)odidn' Coues, Bull. U.S. Cxeol. and Geogr. Surv. Terr., 2d ser., i, 



p. 253. 

 1901. Zapodidiv Lyon, Proc. U.S. Nat. Mus. xxxiii, p. 666, May 2, 1901. 



(ieographical distrihufion. — Boreal portions of both hemi- 

 spheres, east in Europe to Norway. 



Chnrarters. — Skull and teeth with a general resemblance to 

 those of the Dipodidie though less highly modified ; but infra- 

 orbital foramen similarly large and with distinct supplemental 

 canal along inner boi'der, and jugal in contact with lachrymal ; 

 hind legs much less specialized than in the related family, the 

 foot with live distinct metatarsals. 



Hemarks. — The family Za])odidse, though related to the 



