REPORT OF COMMISSIONERS OF INLAND FISHERIES. 85 



growth between specimens richly provided with food and those 

 which are starved is illustrated by two individuals of the same age 

 which were kept under these different conditions. The age of all 

 specimens (dating from the time of setting) is definitely known. 



4. The series of s])ecimens showing the male and female lobsters, 

 the lobsters bearing the eggs attached to the swimmerettes, the suc- 

 cessive stages in the development of the lobsters from the time of 

 hatching to the third 3^ear of age, and specimens showing the manner 

 of moulting. The lobsters of the later stages represent the only 

 ones ever reared in this country, with the possible exception of one 

 or two specimens kept over winter in an acjuarium. These lob- 

 sters were all carried through the winter in cars which were sunk in 

 Wickford harbor. 



5. An exact reproduction of the floating laboratory or house- 

 boat of the commission rigged mth the lobster raising apparatus is 

 represented by a model executed entirely in copper by Mr. F. E. 

 Stark, of Brown University, and Mr. Knapp. This model will be 

 installed in a tank of water with its machinery in motion. It is 

 of special interest as it is a model of the first successful lobster 

 raising apparatus . * 



6. A series of specimens exhibited under the microscope showing 

 the characteristic appearance of lobster fry of different stages and 

 the parasitic forms which sometimes infest them. 



7. A plaster model shows the configuration of the bottom of 

 Narragansett Bay and of the surrounding land. The model is accu- 

 rately made from the soundings appearing upon the government 

 chart and the counter lines which are. given in the topographical 

 map issued by the government. 



The general merit of the exhibit is that, with a few exceptions, 

 all the facts which are illustrated have been made known for the 

 first time by the investigations of your commission, and the series 



* This statement requires a qualification. Our first apparatus was less extensive and had 

 a somewhat different kind of transmitting machinery. 



