145 



Marine Life. 



The waters of any portion of the coast furnish materia] for 

 the study of marine forms. In the markets there are exposed 

 for sale many forms brought in by fishermen from the grounds 

 along the Coast. It would take a long time to exhaust this large 

 field at the very doors of the schools. Many forms may be col- 

 lected by the pupils for the school work, others may be obtained in 

 the markets or thru fishermen at a trifling expense. 



Shrimps. 



Shrimps may be obtained in the market. It would be well to 

 begin with live shrimps kept in a jar of sea water. They will 

 live quite a while in fresh water. Their motions are to be observed^ 

 by what parts they are accomplished, and how. The dead shrimp 

 is then studied, its appendages (antennas, jaws, legs, and swim- 

 merets) are examined and the attachments to the body, the 

 joints and forms and uses of each; the body, its divisions and the 

 joints which make it up. The two parts which in the insect are 

 known as the head and thorax are, in the shrimp, fused into one 

 case known as the cephalo-thorax. The part posterior is the 

 abdomen, corresponding to the abdomen of insects. The shrimps 

 in the aquarium will feed on shreds of meat. 



Lobsters. 



Lobsters may be obtained in the market (not alive). Those 

 which are red have been boiled. The form is to be studied in the 

 same way as that of the shrimp, and then the two compared, and 

 the pupils will readily perceive that they are very much alike 

 thruout, althoat first they appear so difi'erent. Fresh water cray- 

 fish can sometimes be obtained in the market. It is well to com- 

 pare this form with the lobster. 



