BED CORPUSCLES. 115 



REPTILES. 



Corpuscles Oval. 



Long Short Long Short 



Diam'r. Diam'r. Diam'r. Diam'r. 



Green turtle, . . ^Vi ^ Lizard, . . 

 Land tortoise, . -^ ^ Viper, . . . 



AMPHIBIA. 



Corpuscles Oval. 



Long Short Long Short 



Diam'r. Diam'r. Diam'r. Diam'r. 



Frog, .... yrV* T&T Toad, . . 



FISHES. 

 Corpuscles Oval. 



Long Short Long Short 



Diam'r. Diam'r. Diam'r. Diam'r. 



Perch, . . . vfc, Tnfer Pike, . . . 

 Carp, . . . ^T^T utW Eel. . . . 



Post-mortem Changes of Blood-Corpuscles. In exam in ing 

 the fresh, blood under the microscope, after the specimen has 

 been under observation a short time, the corpuscles assume a 

 peculiar appearance, from the development on their surface 

 of very minute rounded projections, like the granules of a 

 raspberry; indeed they are said by the French to become 

 framboisees, which expresses the appearance very well. A 

 little later, when they have become desiccated to a certain 

 extent, they present a shrunken appearance, and their edges 

 become serrated. Under these circumstances, their original 

 form may be restored by adding to the specimen a liquid of 

 the density of the serum. When they have been completely 

 dried, as in blood spilled upon clothing or a floor, months 

 or even years after, they can be made to assume their char- 

 acteristic form by being carefully moistened with an appro- 

 priate fluid. This property is taken advantage of in exami- 

 nations of old spots supposed to be blood ; and if the manipu- 



