134 FIELD MUSEUM OF NATURAL HISTORY 
Hall 24. 
SPONGES, JELLY FISH, CORALS, ETC. 
In this hall are exhibited materials illustrating the branches 
of the animal kingdom known as the Protozoa (the one-celled 
animals), the Coelenterata (Sponges and Corals), and the Ech- 
inodermata (Crinoids, Starfishes, Sea-urchins and Sea Cucum- 
bers). 
Case 1. — Contains on one side the Protozoa, mostly ani- 
mals of microscopic size. These are illustrated by models rep- 
resenting them magnified about 2,300 times. Next in order are 
the Porifera or Sponges. These include some interesting forms 
such as Neptune’s Cup, the Glass-rope Sponge, Venus’ Flower 
Basket, etc. On the other side of the case are the Millepores, 
and Stylasters, and models representing the Jelly-fishes — such as 
the Portuguese Man of War. 
Case 2. — Contains representatives of the Alcyonaria (Eight- 
rayed Polyps). This group contains the Sea-fans, Sea-feathers, 
Organ-pipe Coral and Red Coral. These are continued in Case 3. 
Cases 3, 4, 5 and 6. — Contain the Zoantharia, which includes 
the Sea-whips, the Sea Anemones and the Stony Corals. At 
the end of Case 6 are a few models representing the Ctenophora 
or Comb-bearing Jelly-fishes. 
Cases 7 and 8 . — Contain part of the Echinodermata, which 
includes the Crinoidea (Sea Lilies, etc.) ; the Ophiuroidea (Brit- 
tle Stars and Basket Stars) and part of the Asteroidea (Star 
Fishes). 
Case 9. — Contains the Echini (Sea-urchins) ; and Holothuria 
(Sea Cucumbers). 
Cases 10 and 11. — Contain the Vermes (Worms) ; and 
Crustacea (Barnacles, Lobsters and Crabs). 
BIRDS. 
The collection of mounted Birds occupies Halls 25, 26 and 
27; Alcove 100, in the West Court, is devoted to Birds’ eggs; 
and near the middle of the west end of the just mentioned court 
are four Habitat Groups of Birds. 
