630 



zooLoor. 



of large subjects for better facility in dissecting. A small sharp- 

 pointed narrow-bladed scalpel, besides a large one, curved, as well as 

 sharp-pointed scissors are useful, with a German silver blow-pipe 

 for temporarily distending vessels ; and also a blunt-pointed copper 

 wire or probe made for surgeon's use, will be necessary. All these in- 

 struments, put up in a compact box, can be purchased at the surgical 

 instrument maker's, as well as syringes for injecting the circulatory- 

 organs and vascular parts of the viscera. 



TABULAR VIEW OF THE EIGHT CLASSES OF VERTEBRATES. 



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SUB-BRANCH III CRANIOTA. 



SUB-BRANCH II. ACRANIA. I. LEPTOCARDH (Lancelet). 



I 

 SUB-BRANCH I. UROCHORDATA. I. TUNICATA. 



