8 SEPIA. 



on the surface. In other four days, a prominence of one end of the 

 internal ovoid became sensible, which I concluded to be the tentacula of 

 the embryo that the ovoid indicated. But on account of the opacity of 

 the mass under the microscope, minutiae are not easily ascertained. 



About fifty ova could be now enumerated in the grape, in irregular 

 stages of advancement. This seemed slower at the longer extremity, 

 where many were huddled together. 



In a fortnight from the beginning, the embryo had lost its ovoidal 

 form. What I was induced to suppose the tentacula, then equalled about 

 half the length under its new aspect. Of three embryos now delineated, 

 two exhibited a red or golden speck, denoting the eye, and appeared on 

 each side of this portion in two ; but nothing was visible in the third. 

 The whole embryo, lying now in an inclined position, were motionless. 

 But in two days several were collapsing and shifting their position. 



At this time the ova had much enlarged, and the contents were 

 very distinctly exposed. Still, as before, the advance to maturity here 

 and in other spawn was unequal, as may be seen from the figures, 

 Plate II. fig. 2, four ova, with ovoidal embryos ; figs. 3, 4, 5, embryos 

 the farthest advanced, though unequally and varied, on June 1. 



The same irregularity yet subsisted on June 3, when there appeared 

 much disparity between the ova at the opposite extremities of the spawn. 

 At the longer extremity the ova were three lines in diameter, and trans- 

 parent, shewing the embryo recumbent, its eyes large and black, and the 

 body now apparently consisting of three portions, occasionally in spas- 

 modic contraction. This resolved into the semblance of slow pulsation, 

 every six or seven seconds, in two days more, and minute red specks were 

 evident on the embryo farthest advanced, which bent from side to side. 



The intumescence of the ovum seemed great on June 7, compared 

 with the progress of the embryo. Besides the eyes of the latter being 

 large, and set in two fleshy oval orbits, though not in the middle, an 

 internal black speck was exposed by some. Fig. 6. 



Many were far advanced on the 9tb, and testifying impatience of 

 confinement ; yet none of at least twenty such escaped before the 12th, 

 or thirty days after the commencement of observation. 



