Case 17. — A fine collection of Aviculce, or pearl oysters, 
among which are the four beautiful carvings of extreme beauty 
from Taranto, Italy. 
Case 18. — Various members of the oyster family, the ele- 
phant-tooth shells, the Chitons, or coat-of-mail shells, and the 
Patellas. or limpets. In the left hand end of this case is a speci- 
men of oyster which was found attached to the back of a land 
tortoise. 
Cases 19, 20, and 21. — Various groups of the univalves 
Note especially the Trochus, or top-shells, the Haliotis, or ear- 
shells (19), the Natica, or moon-shells (20), and the Vermetus, or 
worm-shells (21). 
Cases 22 and 23. — Cyprceas, or cowrys, and the Cassis, ox 
helmet-shells. 
Case 24:. — Collection of Murex, or rock-shell, among which 
are many beautiful examples of this rare family. At the right 
end of the case is a fine collection of the Buccinum, or whelks, — 
hardy shells from the North Sea. 
Cases 25 and 26. — Collections of Volutes, or bat-shells 
and Olivas, or olive-shells. The ends of Cases 26 and 27 are 
devoted to the collections of the family of Cones, among which 
are several rare examples of this beautiful family. 
Case 27. — Mostly collections of the so2i-s\\xgs {Nudibranch- 
iata), represented by a large number of beautiful glass models 
and colored drawings made from the living animals. 
Cases 28 and 29. — A large collection of land shells. 
Case 30« — Collection of Cephalopods, or devil-fishes, repre- 
sented by many beautiful glass models and colored drawings. Of 
especial interest is the set of Paper Nautilus, showing the female, 
the male, and the shell; also a model of the animal and shell of 
the Pearly Nautilus. 
Case 33. — Collection of devil-fishes in alcohol. Of unusual 
interest is the alcoholic specimen of the Pearly Nautilus, with the 
animal placed in situ in the shell. 
Case 34:. — A number of shells of extraordinary size. 
Case 31. — Collection of crabs and sea-spiders {Crustacea), 
Of especial interest are large specimens of the lobster, the horse- 
shoe group, and the shrimp. 
Case 32. — A collection of 2,000 species of butterflies {Lepi- 
