139 
HALL 22. 
FISHE5 AND REPTILES. 
In this Hall are representatives of the cold-blooded verte- 
brates or vertebrate-like animals which are included in the follow- 
ing classes, viz.: Tunicata (the ascidians); Leptocardii (the 
lancelets); Marsipohranchii (the lampreys); Pisces (the shark’s 
rays and the true fishes); Batrachia (salamanders, frogs, toads, 
etc.); Reptilia (snakes, lizards, turtles, etc.). 
The first four classes are represented in the six cases in the 
north half of the hall, the remaining two classes are in the three 
cases in the south quarter of the hall, while the remaining two 
cases contain animals too large to be placed in the other cases 
where they properly belong. 
Case 1. — This case contains some material representing the 
group of ascidians {Tunicata). It consists almost wholly of glass 
models. There is also a small amount of material belonging to the 
Leptocardii and the M arsipohranchii. 
Cases 1 to 6. — The true fishes begin in Case i. As far as 
possible they are arranged in systematic order, beginning with the 
Selachii (sharks) and ending in Case 6 with the Pediculati (bat- 
fishes, etc.). The materials consist of mounted fishes, usually not 
well prepared, a number of plaster casts and fluid preparations. 
The fluid preparations are taken from collections made in and 
about the region of Chicago, a collection made on the western 
coast of Florida, and presented to the museum by Mr. Owen F. 
Aldis, of Chicago; a collection made by the museum’s East Afri- 
can Expedition in the Gulf of Aden, donations from the Smith- 
sonian Institution, and a few small collections from other sources. 
Among the more interesting fishes in the collection, attention may 
be called to the following: The mackerel shark, the tiger-shark, 
and the saw-fish, the sting and electric rays, the Polypteris. 
Cases 7 and 8. — Contain fishes and reptiles too large to 
be placed in cases where they properly belong. The labels indi- 
cate their position in the series. 
Case 9. — Amphibia. The collection of amphibians is small, 
and is arranged in the upper portion of this case. Only the two 
forms are represented, Gradientia (the salamanders) and the 
Salientia (the frogs, toads, etc.). 
