PLAN FOR AN EDUCATIONAL EXHIBIT OF FISHES. 1 32 1 



small white-lettered boards at the top of each case (pi. cxxxiii) . A case may 

 contain as many as four or five suborders, or if many forms are shown, as in 

 the Perciformes (pi. cxxx), or if the specimens are large, as in the Selachii 

 (pi. cxxxv), two cases may be devoted to a single suborder. The location of 

 each suborder is indicated by black lettering on the glass doors of the cases (pi. 

 cxxxvi) , and a definition of the group, together with a list of such of its included 

 families as are represented in the exhibit, are found in descriptive case-labels 

 hung on the doors of the cases (see pis. cxxxvi, cxxxviii, and fig. 4, p. 1324). 



The families are separated from each other by narrow bands of adhesive tape 

 (pi. cxxxvii), harmonizing in color with the background, and are identified 

 by small family-labels (text fig. 2) giving both the popular and scientific 

 names and fastened to the back of the case in each family group. Under each 

 specimen is a special descriptive label (text fig. 3) which gives the popular name 



TROUTS 



Family SALMONioyE 



Fig. 2. — Example of family label. 



in prominent type, while the scientific name is printed in smaller italic characters 

 below. The name is followed by a brief popular description of the fish's habits, 

 peculiarities, economic value, and geographical distribution. No effort, how- 

 ever, has been made to exhibit anything like a complete fish fauna, as the exhibit 

 is entirely synoptic in character, only the principal families being shown and the 

 typical and most interesting species in each family. Geographical distribution 

 maps are being provided for the typical forms. Through the center of the hall 

 will be placed groups illustrating life habits and other biological features. These 

 will be of the general style shown in plate cxxxii. None are completed as yet, 

 but in their places a few reptile groups have been installed temporarily. 



The arrangement of the fish plates may be seen in plates cxxx, cxxxiii, 

 cxxxiv, cxxxvi, and cxxxvii. They are mounted in passe-partout style and 

 are hung to the backs of the cases in their proper synoptic position. 



B. B. F. 1908— Pt 2—41 



