ANIMAL REPRODUCTIONS. 289 
“turgid with cerulean blood, is protruded from 
“the head, and mutually introduced into the fe- 
* male aperture, penetrating deep within; and 
« they are entwined in fuch a manner, for two 
“ hours, or even more fometimes, that they will 
* fooner fuffer the rupture of the male organs 
“than defift from copulation. By a forced fe- 
“ paration, it is edfy to obferve how the canals, 
“from which the male organs iffue, furround 
‘ and embrace the origin of the appendage to the 
‘uterus or vagina, and, in that fituation, how 
© much they are diftended with a cerulean blood. 
‘All this may be viewed without the aid of 
* the fcalpel; but it becomes neceflary, when we 
© defire to examine the internal organization, and 
€ particularly that of the head, which is the chief 
* object of our refearch. On longitudinally cut- 
* ting and folding down half the fkin which co- 
“vers the neck, head, and cutaneous mutcle, 
‘ there is, -in‘the firft place, obferved, befides 2 
* fine arachnoid membrane on the extreme an- 
* terior part, a prominent-ovular globe, compre- 
“ hending the two mandibles, the mouth, tongue, 
‘ and alfo the origin of the cefophagus, plate 7, 
‘fig. 1.bb. The upper mandible is cartilagi- 
“nous, and forms the palate within: from the 
“higher part a femilunar offeous tooth projects, 
“ which in colour and‘fhape refembles one of the 
* tortoife fhell combs wore by our ladies for-or- 
Vou. I, Ai * nament 
