OF ARTS AND SCIENCES. 67 



18 th of May, a few eggs were scattered on several of the beds. On 

 the 19th, there were more. With the spear and the snare, several 

 dozens of both sexes of the fish were taken. Taking one out did not 

 seem greatly to startle the others. They returned very soon. The 

 males are much smaller than the average size of the females ; and, 

 judging from those taken, would seem to have as adults greater uni- 

 formity in size. The largest taken was a female, of four feet one 

 inch and a half in length. Others of two feet six inches contained 

 ripe ova. With the 19th of May, all disappeared, and for a time — 

 the weather meanwhile being cold and stormy — there were no signs 

 of their continued existence to be met with. Nearly two weeks later, 

 on the 31st of May, as stated by Mr. Henry J. Perry, they again 

 came up, not in small detachments on scattered points as before, but 

 in multitudes, on every shoal at all according with their ideas of 

 spawning-beds. They remained but two days. During the summer it 

 happens now and then that one is seen to come up for his mouthful 

 of air ; beyond this there will be nothing to suggest the ravenous 

 masses hidden by the darkness of the waters." 



To Mr. Garman I am greatly indebted for the care with which he 

 transported a quantity of garpike eggs contained in two pails which 

 had to be carried by hand from Ogdensburgh to Cambridge, and for 

 the arrangements made with Mr. Perry for collecting a series of eggs 

 and of young fishes in all stages from the time of spawning until the 

 end of July. 



The present paper is, of course, merely a preliminary account, and 

 I hope to give on another occasion a full description of the early 

 stages of the egg, as well as a more detailed description of the 

 changes the young undergo. Of the eggs brought to Cambridge, only 

 thirty hatched. In my anxiety lest this attempt should fail, I did not 

 dare to examine any of the fresh eggs; and from an external exam- 

 ination little or nothing of the early stages of segmentation and of 

 the development could be traced on account of the opacity of the 

 envelope of the egg. Not one of the eggs artificially fecundated was 

 hatched, and only a few of those laid on the angular blocks (men- 

 tioned by Mr. Garman) lived to complete their development. The 

 eggs were all attacked by mould, and decomposed rapidly in spite of 

 the most watchful care. The few which did hatch, however, fully 

 rewarded my efforts and fulfilled my anticipations. The young fish 

 were quite hardy and flourished admirably. Of the thirty hatched in 

 the latter part of May, no less than twenty-eight lived till the middle 

 of July. They were exceedingly hardy, and, had it been possible to 



