ANATOMY OF TBE TURTLE. 



507 



largest. Tlie dors;il cara])ace is oomposecl of thii-ty-eiglit 

 plates, twenty-flve marginal, of which the most anterior lies 

 in the middle line ; there are five median and two lateral 

 rows of four plates each. 



To dissect a turtle, saw through the lateral pieces of Lhe 



Fig. 446. — Anatomy of the Turtle, Chrysemys picta. — Drawn "by C. S. Minot. 



shell which unite the plastron and carapace, then remove 

 the ventral piece, carefully freeing it from the underlying 



Fig. 446 represents a female, with the intestines and di- 

 gestive glands partially freed and turned aside, while the 

 shoulder-blade, oviduct, and ovary of the left side and the 



