SUMMARY OF OBSERVATIONS AND DISCOVERIES 137 



41. The preceding particulars of structure, habits, development, 

 times, places, periods, foods, temperature, salinity, etc., make progress 

 in oyster culture seem possible. 



42. An improved method in oyster culture is proposed. 



43. Prince Edward Island oysters transplanted to British Columbian 

 waters live, grow and breed, and the eggs, embryos, and larvse develop. 



44. They could be transplanted to many places up and down our 

 Atlantic coast, with a likelihood of living if looked after. 



45. Native British Columbian oysters resemble the English (common 

 European) oyster, and differ from the Atlantic oyster of this continent. 



46. The eggs do not pass out at once into the sea but are held for a 

 period in the pallial chamber, where development through the embryo 

 and into the straight-hinged shell stage of the larva takes place. 



47. Experiments in cross-fertilization between British Columbian 

 and Prince Edward Island oysters give no results. 



48. Since interbreeding between them is impossible, they may be 

 raised on the same beds without lowering the standard of either. 



49. The hermaphrodite condition of the British Columbian and com- 

 mon European oyster is doubtless most primitive, and the dioecious state 

 of our Atlantic oyster and of the Portuguese oyster is secondary or most 

 specialized. 



50. Numerous structural, developmental, physical, or other observa- 

 tions have been made, that are of interest from a zoological point of view 

 or of use from a cultural standpoint. 



