M I G R O S C OP I C A L E s SAYS. 525: 



nimbly j others get out, uncoil, and move about more {lowly ; 

 and the leaft mature continue entirely without motion. The 

 uterus,, or vefTel that contains all thefe oval bodies, is coinpofed 

 of many annula, or ringlets, not unlike the afpera arteria of land 

 animals, and it feems to be confiderably elaftic ; for as foon as 

 the operation is performed, the oval bodies are thruft. out with 

 fome degree of violence, by the fpringing back or adion of this 

 bowel. An hundred or upwards of the young ones have been 

 feen to iffue from, one fmgle eel, whereby the prodigious increafe 

 of them may be accounted for, as probably feveral fuch numerous 

 generations are produced in a fhort time. Hereby we alfo learn 

 that thefe creatures are not only like eels in (hape, but are like- 

 wife viviparous, as eels are generally fuppofed to be,. 



There, is fcarce a more entertaining experiment, in which there 

 is but little rilk of being difappointed ; for they feem, like 

 earth-worms, to be all prolific, and unlefs by accident you cut 

 one that has brought forth all it's young before, Or make your 

 trials when the pafte has been kept a very long time, (in which 

 cafe they have been found fometimes unfruitful) you may be fure 

 of fuccefs.. 



An <r uillula . Marina. . 



This, when preffed between two plates ofglafs, appears to be 

 little more than a cryftalline fkin, with a kind of clay-coloured 

 interlines. The fore-part of the body is truncated, the lower 

 part drawn out to a fine point, the reft of the body is of an equal 

 fize throughout. The younger ones are filled with pellucid 

 molecular inteftmes, 



72. yihrk 



