LIST OF PLATES. 



I. Hasemania and Hyphessobrycon. 



1 1 . Hyphessobrycon . 



III. Hyphessobrycon and Hemigrammus. 



IV. Probolodus and Psalidodon. 



Y. Spintherobolus and Glandulocauda. 

 VI. Hysteronolus, Creagrutus, and Phenacogaster. 

 VII. I 'esicatrus and j4s/va«a.v. 

 VIII. .1 styanax and Deulerodon. 

 IX. Astyanax gymnogenys Eigcnmann. 

 X. Belonostomus tenuirostris Agassiz. 

 XI. Q-'jwscopus elongatus Eastman. 

 XII. Facsimile of Note Addressed by Gen. U. S. Grant to Hon. Edwin 

 M. Stanton. 

 XIII. Life-mask of General Robert E. Lee by Clark Mills. 

 XIV. Albert J. Barr. 



XV. Prism made by Dr. David Alter, of Freeport, Pennsylvania. 

 XVI. Wooden Mummy-label. 

 XVII. Wooden Mummy-label. 

 XVIII. Anatomy of Najades, Sections of Gills. 

 XIX. Glochidia of Najades. 

 XX. Glochidia of Najades. 

 XXI. Male, Female, and Young of Sienomylus hitchcocki Loomis. 

 XXII. Mounted Group of Stenomylus hitchcocki Loomis. 

 XXIII. Diplomyslus goodi Eastman. 



XX I Y. Enchodus sp. ind. and Diplomyslus goodi Eastman. 

 XXV. Scleromystax barbatus (Quoy & Gaimard) and Cascadura maculo- 

 cephala Ellis. 

 XXVI. Decapogon uroslrialum Ribeiro, Chcenoihorax eigenmanni Ellis, and 



Aspidoras rochai von Ihering. 

 XXVII. Corydoras juquiace von Ihering, Corydoras virescens Ribeiro, and 

 Corydoras armatus (Giinther). 

 XXVIII. Corydoras flaveolus von Ihering, Corydoras garbei von Ihering, and 

 Corydoras kronei Ribeiro. 

 XXIX. Corydoras kronei Ribeiro and Corydoras muliimaculatus Steindachner. 

 XXX. Corydoras paleatus (Jenyns), Corydoras agassizii Steindachner, and 



Osteogasler (Corydoras) eques Steindachne.-. 

 XXXI. Corydoras nattereri Steindachner and Decapogon adspersion (Stein- 

 dachner). 



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