492 MAMMALIA. 



and a very small one on the interior side ; third molar with four 

 triangles, one anterior, two exterior, and a minute interior one ; 

 fore feet four-toed, with an armed rudiment of a fifth toe ; hind 

 feet five-toed. 



Neoloma Floridana. — The Florida Neotoma. — Plate VI**. 

 fig. 4. — Fur extremely fine, on the upper part of the body lead 

 coloured, intermixed with yellow and black hairs ; border of the 

 abdomen and throat buff colour ; snout elongated ; whiskers 

 very long ; eyes and ears very large ; tail longer than the body, 

 white beneath, dusky above, its scales so small as to be covered 

 with the hair. Length of the body seven inches and a half; 

 tail six inches and a quarter. Inhabits East Florida. 



Genus 6. — Sigmadon. — Say mid Ord, 



Generic Character — Incisors \, molars ^^e 5 l^otal 16. JMolars 

 in each jaw with very profound radicles towards the summit, 

 composed of alternate folds, two on each side, extend to the 

 middle of the teeth ; the incisors in the upper jaw slightly 

 rounded, in the inferior jaw obliquely truncate; tail hairy; feet 

 simple ; fore feet four-toed, with the rudiment of a fifth toe 

 having a nail ; hind feet five-toed. 



Sigmadon hispidum. — The Prickly Sigmadon. — Zoological 

 Journal, vol. II. plate X. fig. 5, 6, 7, 8. — Head thick; snout 

 elongated ; eyes and ears large, the latter round, slightly clothed 

 with hair; tail nearly as long as the body ; fore legs short ; hind 

 feet large and strong ; lateral toes very short ; claws stout ; 

 upper parts and head pale dirty ochre yellow, mixed with black ; 

 lower parts ash-coloyred ; hair of the upper parts and sides long, 

 plentiful, and coarse. Length from the tip of the snout to the 

 tail six inches ; tail four inches. Inhabits the banks of the river 

 St John in East Florida. 



Genus 7 Lemmus — Cuvier. 



Generic Character. — Incisors |, no canines, grinders |-^ ; to- 

 tal 16. Grinders with a flat crown and angular plates of ena- 

 mel ; ears very short ; fore feet in some species have five and 

 in others four toes, with nails on all of them fitted for digging; 

 tail short, covered with hair. 



Lemmus Norvegicus. — The Lemming, or Lapland Mar- 

 mot.— Plate XV. fig. 2.— Described, vol. II. p. ^11. 



