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the parent, being fixed between thofe organs or limbs, which we 

 call its feet, and there they are nouriflied and brought to full ma- 

 turity by a fmall firing or ligament ; being thus proteded by the 

 parent until the young Shrimp within is able to break through the 

 fhell and feek food for itfelf. 



In order to view the nature of thefe imborn Shrimps, I took fe- 

 veral out of the fhells, and having placed them before the micro- 

 fcope, I fent for the limner, whom I directed to make as accurate 

 drawings of them as he could, without informing him what the ob- 

 jects were, and while he was employed in fo doing, he often faid, 

 " I do not know what I am drawing, but it feems to me to be a 

 *' Shrimp." 



Plate XVIII. fg. 29, AB CD, is one of thefe unborn Shrimps, 

 taken out of the egg, which I extended as much as poflible from 

 the rounding pofition in which it lay ; but though I endeavoured to 

 take thefe Shrimps out of the eggs with the greatell care, yet I 

 could not do it fo completely, but that in one of them the tail ap- 

 peared moft plainly, in another the head, and in another the feet. 

 In this figure, A B D denotes the head of the Shrimp, but wherein 

 the feet and other prominent parts, which we fee in full grown 

 Shrimps with the naked eye, cannot be dillinguilhed, becaufe all 

 thofe parts are, as it were, clofely folded together next the head, 

 and are extended towards B. Fig. 3o, E F G H I K, is another un- 

 born Shrimp, which drawing I caufed to be made only becaufe here, 

 at the letter E, the fins can be plainly feen, together with the bony 

 parts deflined to give flrength to the fins. E F G is a part of the 

 yolk of the egg yet remaining. 



Upon comparing the fize of the eggs from which thefe young 

 Shrimps were taken, with grains of common fcowering land, I found 

 them, for the mofl part, of the fame fize, though fbme were rather 

 larger and others fmallcr. 



Some years after this I renewed my obfervations on Shrimps, in 

 order to dilcover the circulation of the blood in thofe animals, and 



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