AN EDUCATIONAL EXHIBIT OF FISHES. 1 347 



It is believed that such an exhibit as that outlined in this paper is quite 

 within the reach of a museum, even of moderate size. Naturally it could not 

 be brought together all at once, but it might be assembled gradually, taking for 

 immediate display such species as were available and waiting for the others to 

 be acquired. Where vacancies occurred, due to the lack of species needed for 

 the representation of important groups, this might be noted on a label, or in 

 many instances a figure of the fish might be shown. This would call attention 

 to the needs of the collection and might lead to securing desirable specimens. 



The systematic series calls for about 175 specimens, including fossils, 44 

 skeletons and other anatomical pieces, and 13 figures in cases where species are 

 rare or small; a total of 230 specimens. This may seem a small number to 

 represent a group containing over 13,000 living species, but it would be an easy 

 matter to add systematically to such a collection, while, on the other hand, it 

 is believed to present a fairly good idea of the extent and principal modifications 

 of the group. 



SYNOPSIS OF ARRANGEMENT AND LIST OF PRINCIPAL SPECIMENS TO BE SHOWN. 



INTRODUCTORY DISPLAY. 



Fishes and fish-like vertebrates, showing the forms popularly known as 

 fishes — ^the lancelet, lamprey, ostracophore, and dogfish, and the bass or other 

 acanthopterygian. To be accompanied by skeletons and figures to make clear 

 the meaning of such terms as Acrania, Craniota, and Gnathostomata. 



THE CLASSES ELASMOBRANCHII AND TELEOSTOMI COMPARED AND CONTRASTED. 



Skull of shark showing that the cranium is a mass of calcified cartilage and 

 not composed of separate bones, and showing the manner in which the jaw is 

 connected with the cranium. Specimen showing the separate gill openings. 



Skull of bony fish, cast or specimen showing single gill opening and flap. 



ANATOMY OF FISHES. 



Cast showing the external topography of a fish with the name of the prin- 

 cipal parts or regions. 



Skeleton; dermal bones to be removed from one side of the skull. 



Cranium of fish compared with that of mammal, the corresponding bones 

 similarly colored. To illustrate great differences between the two groups. 



Model showing the general anatomy of a teleost fish. 



Dissections, accompanied by models, showing nervous and circulatory 

 systems. 



Specimens and models showing the development of a fish. 



