INTRODUCTION. 



drawings should be in outline only; shading should not 

 be attempted. Frequently the use of colored pencils will 

 make the sketches more intelligible, and for this purpose 

 the following conventional colors may be suggested: 



Arterial circulation, red. Venous circulation, blue. 



Alimentary canal, brown. Liver, green. 



Kidneys, purple. Reproductive organs, yellow 

 Nerves, gray. 



The laboratory should be provided with an oil-stone for 

 sharpening instruments; a pair of bone forceps * for cut- 

 ting hard substances; a hypodermic and an injecting 

 syringe for injection; a skeleton of at least one representa- 

 tive of each great group of Vertebrates; and at least one 

 good compound microscope. It will also be advantageous 

 to have a small equipment for microscopic mounting, 

 as there are frequent opportunities for the preparation 

 of objects of interest and value for demonstration to the 

 class. 



MATERIAL FOR DISSECTION. 



The forms selected for study are, so far as possible, such 

 as can readily be obtained in any locality by taking a little 

 pains at the proper season. There are, however, certain 

 groups of animals which occur only in the sea, and represent- 

 atives of these must be obtained from the shore. These 

 marine forms selected are Embryo Dogfish (Acanthias), 

 Squid (Loligo), Sea-urchin (Strongylocentrotus, Arbacia), 

 Starfish (Asterias), Sea-anemone (Metridium), Hydroid 

 (Pennaria), and Calcareous Sponge (Grantia). The series 



* Side-cut pliers will do. 



