290 ANIMAL REPRODUCTIONS, 
¢nament on their hair. The tooth is an aggre- 
‘ gate of fix or feven dentes incifores, pointed be- 
‘low, but fo united as to form only a fingle 
‘tooth. The jaw, or rather gum or under lip, 
‘has no teeth; it is feparate from two foft fub- 
¢ ftances of a dark colour towards the cefopha- 
‘ gus, which confine the tongue. The mouth is 
© bounded before and behind «by the teeth and 
‘ cefophagus; above and below by the salt 
* and tongue. 
‘The tongue is not free; it is bridled por 
‘ united to the under jaw two furrowed carti- 
© Jaginous membranes form its fubftance; the 
€ upper connected with that which covers the 
.© under jaw, and, curving behind, defcends with 
‘an inflexion, and comes forward under the 
‘ lower membrane; then receding, it terminates 
‘in a fmall dark globular appendage, which pro- 
< jects from the under part of the ovular globe, 
€fig. 2. d. This appendage contains a white 
‘ longifh curvated mafs, which, being moveable 
‘and connected with the anterior part of the 
* tongue, where the cefophagus commences, does 
‘ not feem to be placed there by nature without 
¢ fome particular ufe.. The lower membrane of 
‘the tongue, which is much thicker than the 
‘ upper, convex above, femicircular and hollow 
‘ below ; and is rooted in the fore part of the 
* under jaw, and terminates free where the upper 
* membrane 
