410 THE AMERICAN MOxXTHLY [Dec. 



The subject sliould be examined point I y jioiiit, veri- 

 fying all statements and considering' all qnestions ihat 

 may be asked. The specimen should be kej)t moist all 

 the time and all the internal anatomy and some of the 

 external can be best made out underwater, by using a pan 

 with the bottom covered with paraffine, inio which pins 

 are to be thrust to hold the specimen in position. The 

 water must be changed as often as it becomes turbid. 

 Unfinished dissections should as a rule be kept in ab-ohol, 

 brine or formol and finished subsequently. Side reading 

 in anatomy is of great importance especi.illy for a morph- 

 ologist and a constant practice of comp-irison is abso- 

 lutely indispiensiblc as a fixed habit of mind. 



The types tliat have been selected as the basis for study 

 are easily obtained in the City of Saint PauL if they are 

 not obtainable elsewhere related forms can be used; for 

 while the descriptions are for iliP: most part based 

 directly on the animals indicated, other allied forms are 

 sufficiently similar for dissection in a first course. For 

 general reference the student shoubi have VViedei-.-heini'tj 

 Comparative Anatomy of Vertebrates; besides whi(di are 

 the admirable articles in the Encyclopaedia Krittauica. 

 Parker's Zootomy is a most excellent guide where a fuller 



course is desired. 



PART I. 



THE TELEOSTEAN FISH. 



Osmerus mordax, The Eastern Smelt. 



CONTENTS. 



1. External Anatomy. 9. Tlie AliiiieinaTv Visceni 



2. The Head. l*-. 'I lie Heart and Ml.i.Kl-Vthsel'',. 



3. The Nose. 11. The Un> Genital Sy-nui. 



4. The Eyes. I'i. Tlie Mnscnlar ^v^t<-m. 



5. The Ear. 13. The Nei\ons System. 



6. The Mouth and Throat. 14. '1 lie Sk.U'ioii ul' ilie fiu k,. ■ 



7. The Biain. 15. Tlie SkiiII. 



8. rrincipal Parts of the Trunk \Q, The Skin. 



and Post-Abdomen. • '• 



