
FOOD AND FEEDING 

Naturat Foop. The live food consists of the following Crus- 
tacean denizens of still water ditches, ponds and streams, which are 
classified as follows: 
{ Branchiopoda. 
Cladocera. 
Phyllopoda. + Ostrocoda. 
| Copopoda. 
Entomostraca 
Crustacea 

Isopoda. 
Decapoda. 
Malacostraca - 
| er 
Ewnromostraca. This sub-class of the Crustaceans are simple organ- 
isms usually of small, often microscopic size. Order PHyttopopa. Body 
segmented, covered with a carapace, swimming feet with branchial sacs, man- 
dables without feelers, and reduced maxille. Sub-order BRANCHIOPODA. 
Body distinctly segmental, numerous pairs of swimming feet, shieldshaped 
carapace, heart an elongated dorsal vessel with numerous pairs of ostia. 
Brancuipus STAGNatts. Fig. 64. This freshwater Crustacean, known 
as the Spring-time shrimp, reaches a length of 1.5 to 2 centimeters. The 
body is covered with a segmental mantle, the head 1s large and the abdomen 
£2 furnished with caudal appendages. It has eleven pairs of 
legs, furnished with breathing and swimming hairs, 
two pairs of antenne, and a lengthened caudal appendage 
with swimming bristles. The crablike eyes are large and 
distinct. The almost transparent body is of bluish-green 
color on the back, the head, sides of tne abdomen and 
the swimming bristles yellow, the antenne and caudal 
appendages red, and the eyes black. Its food consists of 
; tiny water animalcule and alge, but it will attack spawn 
 - and young fishes. It usually swims on its back and 1s 

ers 64. Branchipus MEVEY at rest; the movement is eratic, either by quick 
stagnalis. Greatly enlarged. strokes of the legs or by springs in the water by means 
of a rapid movement of the abdomen. A good food for adult goldfishes, 
and other freshwater fishes. 
Apus Cancrirormus. Fig. 65. This freshwater Crustacean may 
occur in great numbers or entirely disappear for years. In form it re- 
sembles the Limulus or King Crab in miniature, as it never exceeds 
3 centimeters in length. The body is flat, covered bya shieldlike mantle, 
and the slender tail is as long as the body. On the shell there are two 
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