REPORT OF COMMISSIONERS OF INLAND FISHERIES. 93 



are hatched and the yolk sac has been absorbed. The J'oung when 

 released from the brood pouch are from ^ to ? (8 to 10 mm.) in length. 

 10 specimens hatched at Experiment Station June 13, 1910, averaged 

 8.5 m., ranging from 8 to 9.4 mm. (W. E. Sullivan.) The following 

 specimens with eggs have been taken at Wickford: 



May 30, 1910, 2 males, having eggs showing eye spotd were taken 

 in seine, Cornelius Island; hatched June 13. One male, with young 

 taken with light at night, June 8, (Sullivan.) July 7, 1906, 

 seine, north shore of Mill Cove, male and female specimens, each 

 with eggs. July 7, 1906, Cornelius Island, seine, several males 

 and females, each with eggs, those in male showing eye spots. 

 July 17, 1908, male taken in seine; in its pouch were young which soon 

 swam free. August 13, 1906, many specimens, each with eggs. 

 Females with eggs were taken in Narragansett Bay March 22, 

 1907 (Bumpus, Science, VII, 1898, 485). Breeding pipe-fish seined 

 from eel-grass on May 13, and have been found with pouches filled with 

 egg as late as July 13 at Woods Hole (Bumpus, Science, VIII, 1898, 58). 



Food: Small Crustacea, amphipods and copepods. 



Rate of Growth: The rate of growth of specimens hatched in a filter 

 car at the Wickford Station is shown by the following tables. These 

 figures represent averages of measurements of several individuals taken 

 out at irregular intervals. No food was given to them except that which 

 came in -nath the water by means of the chain of buckets. (See Mead, 

 1908, 102.) 



Mm. Mm. 



July 17 10.0 July 30 44.0 



July 18 11.4 July31 46.1 



July 20 21.8 August 2 52.6 



July 23 24.5 August 6 61.6 



July 25 27.5 August 8 58.6 



July 27 26.5 August 11 67.4 



On August 21 the remaining specimens were transferred to another filter 

 car with canvas lining, where they remained, alive and well, up to Sep- 

 tember 19. 



On July 21 another pipe-fish was caught wdth a brood pouch full of young 

 which measured 10 miUimeters. 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 Uved and thrived 

 equally well. No food was given them except on one or two occasions. 

 The data of growth is as follows: 



