174 BULLETIN OF THE UNITED STATES FISH COMMISSION. 

 Vessels belonging to the port of Gloucester engaged in fishing June 1, IS 



Ou the batiks, for fresh halibut 41 



Ou George's and Brown's, for halibut and cod /• 155 



On Grand Banks, for codfish 33 



On Western and Banquereau, for cod and halibut 51 



Ou fishing grounds off the New England coast, ground fishing 34 



On fishing grounds oft* the New England coast, lobster fishing 6 



On halibut trips to Greenland and Iceland 11 



On mackerel voyages, mostly now between Sandy Hook and No Man's Land 140 



Steamer, mackerel fishing 1 



Total 472 



Receipts of fish, at Gloucester, Mass., in May, 1S85. 



* Off Burgeo, 4 miles from shore. 



tOff Sambro, and between La Have and Western Banks, ou La Have Bidges. 



Other receipts : From nets and traps in the harbor, 419 barrels of herring, from small boats fishing 

 near shore, 14,000 pounds of codfish and 1 halibut. The latter weighed 193 pounds; was caught 5 

 miles from Eastern Poiut Light, Gloucester Harbor. Received from Grand Manan, 500 boxes smoked 

 herring. 



38.-ON THE RATE OF GROWTH OF THE COMMON CLAM, AND ON A 

 MODE OF OBTAINING THE YOUNG OF THE GIANT CLAMS OF THE 



PACIFIC COAST FOB THE PURPOSE OF TRANSPLANTING. 



By JOHN A. RYDER. 



During tbe season of 1880 I made some observations on the develop- 

 ment of the common clam (Mya arcnaria, L.). These* were published 

 in the report of T. B. Ferguson, a commissioner of fisheries of Maryland 

 for 1881. It was there shown that (1) the spawning season extends 

 from about the 10th of September to about the middle of October; (2) 

 that the eggs and milt may be extracted from the surface of the visceral 

 mass of the adults in the same way as from the oyster, and artificially 

 impregnated ; (3) that the early development was very similar to that 



" Notes on some of the early stages of development of the clam, or mananosfe (Mya 

 armaria, L.). In Appendix A of the above-cited report, pp. 83-91, 11 figs. 



