VOL. XIII.] 1»HIL0S0PHICAL TRANSACTIONS. 60f 



The same Eclipse observed at Dantzic hy M. Hevelius. N° 146, p. 146. 



Phases. Corrected time. 



Beginning of penumbra, very faint 8*^ 40"* 46* 



Beginning of the eclipse 10 25 5 



Total emersion of the moon 11 27 30 



Beginning of the emersion 13 O 8 



The central emersion 13 28 40 



End of the eclipse 13 59 17 



End of the penumbra 14 15 O 



Lumbricus Teres,* or some Anatomical Observations on the Round IVorm bred in 

 human Bodies. By Edward Tyson, M.D. &c. N° 147, P- 154. 



I shall here give the anatomy of the lumbricus teres, that common round 

 worm which children usually are troubled with: and in this more particularly 

 make my remarks on the organs of generation in both sexes; and herein show 

 how vastly different they are from those parts in the common earth worms, and 

 perhaps most others. I had designed to have given also the anatomy of the 

 earth worm ; but have since altered my intentions: and at present shall refer to 

 the account given of it by the famous Dr. Willis, reserving my farther obser- 

 vations of it to another opportunity. This sort of worm by Hippocrates is named 

 o-T^oyyuXat; by Celsus, teretes; and is usually about a foot long, more or less; but 

 I have hitherto observed that the male is generally less than the female: so that 

 by their magnitude in the same body I have before dissection been able to dis- 

 tinguish the sex. They are about the size of a wheat straw, or a goose quill ; 

 their colour white; but being subjects so generally known to all, I shall forbear 

 a further description of their outward parts ; only as I remember I did not ob- 

 serve those feet, or asperities on the annul i, as in the earth worm. At both 

 extremes they grow narrow. Their mouth is composed of three lips as in 

 the figure. So the leech has three cartilaginous teeth set in a triangle, by 

 which they make the wound in the skin in suction. The anus is a transverse 

 slit a little before the extreme point of the tail. 



In opening the body I found I cut through a large muscle under the skin : 

 which muscle in earth worms I find is spiral; as in a good measure is their mo- 

 tion likewise ; so that by this means, like the worm of an auger, they can the 

 better bore their passage into the earth. Their reptile motion also may be ex- 

 plained by a wire wound on a cylinder; which when slipped off, and one end 

 extended and held fast, will bring the other nearer it. So the earth-worm, 



* Ascaris lumbricoides. Linn. 



