TABLE OF CONTENTS. 



Pago. 



CLASS I. LEPTOCARDII 2 



ORDER A. AMPIHOXI 2 



Family I. liranchiostomidsc 2 



Genus 1. Branchiostoma, Costa 3 



1. lanceolatum (Pallas) 3 



2. caribanim, Sundcvall ^ 3 



3. californiense, Gill 4 



Genus 2. Asymmetrou, Andrews 4 



4. lucayanum, Andrews 4 



CLASS II. MAKSIl'OBRANCHII 4 



ORDER B. HVPEROTRETI 5 



Family II. HepMremidie * 5 



Genus 3. Polistotrema, Gill 6 



5. stouti (Lockington) G 



Family III. Myxinidne 7 



Genus 4. Myxine, Linnseus 7 



6. glutiuosa, Linnaeus 7 



ORDER C. HYPEROARTII 8 



Family IV. Petromyzonidse 8 



Genus 5. Bathymyzon, Gill 9 



7. bairdii (Gill) 9 



Genus 6. Petromyzon (Artedi) Linnseus 9 



8. marinus, Linnaeus 10 



8a. unicolor (Do Kay) 10 



Genus 7. Icbthyomyzon, Girard 10 



9. coucolor (Kirtland) 11 



10. castaneus, Girard 11 



Genus 8. Entospheuus, Gill 11 



11. tridentatus (Gairdner) 12 



Genus 9. Lampetra, Gray 12 



12. aurea (Bean) 13 



13. spadicea, Beau 13 



14. cibaria (Girard) 13 



15. wilderi, Gage 13 



CLASS III. PISCES . 14 



SUBCLASS SELACHII 15 



ORDER D. DIPI.O.SPOXDYLI 16 



Family V. Ghlamydotelaehidte 10 



Genus 10. Cblamydoc-ela< bus, Carman 16 



16. ungumeus, Carman 16 



Faiiiilii VI. IJexanchulzz - 17 



Genus 11. Notorhyncbus, Ayres 17 



17. maculatus, Ayres 17 



Genus 12. Hexancbus, Ilafines<iue 18 



18. rorinus, Jordan & Gilbert 1* 



19. griseus (Gmelin) - 19 



(XI) 



