HAPLODONTIDiE— VISCEKA OF UAPLODON RDFUS. 



585 



hair extends some distance, upon modified papillate integument, well defined 

 from the smooth naked mucous membrane proper. Near the angle of the 

 mouth, on the upper lip, there is a curious patch of hair growing upon an 

 island of papillate modified integument like that of the edges of the lips, but 

 entirely separated by a strait of smooth raucous membrane. The roof of the 

 mouth presents a singular series of elevations and depressions,' very unlike the 

 regular transverse ridges and lines of impression seen in many mammals. 

 There is a smooth pad-like eminence just behind the superior incisors, con- 

 stricted across the middle by an emargination on each side. Behind this 

 is another larger prominence, constricted across the middle, with regular con- 

 vex termination posteriorly, and jagged edges anteriorly, joined with the first 

 pad by a narrow furrowed isthmus, but separated behind from succeeding 

 elevations by a deep sulcus. These formations are all anterior to the molars ; 

 the molar interspace, with a short interval anterior to these teeth, is wholly 

 occupied by a series of paired prominences, or two rows of flattened oval 

 ])apilla3 of large size, five or six pairs. These pads rise nearly to the level 

 of the molar crowns.* 



The tongue is thick and fleshy, rounded at the end. Only a small por- 

 tion is visible from the front, but the member is about two inches long, measured 

 from tip to the epiglottis ; it is nearly pamllel-sided, and about one-third of an 

 inch in breadth, the f-^D portion, however, widening to half an inch or more. 

 The dorsum of the tongue is thickly covered with papillie of different kinds. 

 Anteriorly, the papill»e are villous and innumerable; behind, these gradually 

 change into flattened tubercle-like projections. The villous portion of the 

 tongue shows a large number of "conical" papillse, irregularly scattered, while 

 posteriorly there are a few large and distinct "circum vallate" papillse. The 

 phorynx is much contracted. A well-formed but soft and rather narrowly 

 semilunar epiglottis guards the laryngeol orifice, more complete closure 

 during deglutition being apparently effected by a forward movement of the 

 opi)08ite side of the aperture. The rima glottidis is posteriorly a simple 

 cleil, or chink, between the apposed arytenoids. 



There is a large hyoid bone, entirely osseous, excepting the glosso-hyal, 

 which extends forward into the substAnce of the tongue as a gristly rod. The 

 basi-hyal is broadly V-shaped, with an anterior protuberance beyond the 

 angle of the V. There is no uro-hyal. A slender bony style, over half an inch 



• * I do not know how mncli these appearanoea may be due to immeraion in alcohol. 

 •pecimoD, Ibo iwaterior part of the roof of the mouth is quite amooth. 



In another 



