778 BULLETIN OF THE BUREAU OF FISHERIES. 



On August 2 1 the remaining specimens were transferred to another filter 

 car with canvas lining, where they remained alive and well up to September 19. 



On July 21 another pipefish was caught with a brood pouch full of young 

 which measured 10 millimeters. These young were placed, together with the 

 second lot of Menidia, in a filter car rigged with a chain of buckets like the 

 original one. These specimens lived and thrived equally well. No food was 

 given them except on one or two occasions. The data of growth are as follows: 



Mm Mm. Mm. 



July 23 10.7 



July 27 --- 19.0 



July 30 24.0 



Augusts 31-4 



August 6 37.8 



Augusts.. 41.8 



August II 4'-9 



August 15 45-- 



Septembers 59-0 



September 14 62.8 



On August 8 and 10 a number of young bluefish were caught in the seine 

 and were placed in one of the rearing cars which had been provided with coarse 

 window screens of X i^ich mesh. When put into the car there were already 

 present in the water several thousand young anchovies, about 20 to 25 milli- 

 meters in length. These the bluefish ate during the first day. On several 

 occasions a few Menidia and Fundulus were given them to eat. On August 

 12 they were given as much raw meat as they could eat, and this they devoured 

 ravenously. They were fed on meat again on August 15 and on Menidia two 

 days later. The average size of these bluefish on August 18, about ten days 

 after they were put into the car, was 140.8 millimeters, an average increase of 

 about ID millimeters. On September i they were measured again, having 

 been fed meantime on several occasions with Menidia, Fundulus, and other 

 small fishes. The average length on this date, September i, was 174 milli- 

 meters. This measurement and the two which follow were taken from the 

 nose to the end of the fin rays, whereas the previous measurements were taken 

 from the nose to the base of the fin rays. Between September i and Sep- 

 tember 8 the specimens were not fed. On September 8 they measured 175.1 

 millimeters, showing an increase during seven days of i.i millimeters. 



On September 8 a quantity of live fishes was put into the car to serve 

 as food for the bluefish, and during the next seven days the bluefish showed 

 an average growth of about 10 millimeters, the average length being 184.3 

 millimeters. 



The filter cars which have been described, and in which the previously 

 mentioned eggs and young fishes were kept alive, have also proved themselves 

 capable of maintaining a considerable variety of other fishes and invertebrates, 

 among which are the following: Tautog, flatfish, anchovy, oysters (both old and 

 young) , scallops, anomia, crabs, barnacles, polyzoans, Botryllus, Nereis larva:, etc. 



Crabs and scallops. — On August 2, 1908, a very large number of zoeae and 

 megalops of the oyster crab were found floating at the surface of the water. A 



