32 PHILOSOPHICAL TRANSACTIONS. [anNO 1703. 



to have a multitude of legs ; it was not half an inch long, and the body not 

 thicker than a hog's bristle. This insect I put alive into a small tube, and 

 found it a perfect scolopendra, whose body was made up of 6o incisures, at 

 every one of which was a pair of legs, one on each side, and each leg had five 

 articulations. On his head were 2 horns, each of 1 6 joints, and under it a 

 pair of terrible forceps, red, crooked, and jwinted like the talons of a hawk, and 

 I often saw him open and shut them, and wipe his horns through them. These 

 forceps are not unlike, and probably for the same use as those on the head of a 

 spider, but they are hardly seen (because generally kept close) in a living spider, 

 but they are readily found opened, and in their perfect shape, in a spider's 

 exuviae, or cast coat. 



I found a small black flat tick, sticking on my arm, and it had got its fore- 

 part so far into the skin, that I had much ado to separate it with the point of a 

 needle, so as to preserve it entire and unhurt. I observed its snout, fig. b b, 

 shaped not unlike the jagged proboscis of the serra piscis : the forepart a, being 

 like the end of a broad pointed sword, is clear and transparent, and has 3 teeth 

 on each edge, below which there comes out another serrated part bb, on each 

 side, almost at right angles ; but this is partly hid, when viewed on the back, 

 by a thick horn c on the side of the head : I broke off one of the horns at d, 

 and then it appeared as in the figure, which represents the fore part of this 

 tick. 



I afterwards examined the snouts or proboscides of dog ticks, to see if they had 

 the like conformation, and found their appearance as in fig. b 2, the snout a 

 being so covered by the two clumsy thick horns bb, that the serrated edges 

 could not be perceived ; but separating the horns, with some difficulty, they 

 appeared in the position of fig. b 3, and then I could plainly see 8 teeth, or 

 jaggs, on each side, as here expressed: but the snout of a dog tick has not the 

 additional serrated part, which is in the wood tick. I could also perceive a tube 

 or canal run through the snout, and see some bubbles move up and down in it, 

 which I have also endeavoured to represent, as at a in this figure. 



I have found some of those animalcula. in pepper-water almost incredibly 

 minute, which app)ear even to my greatest magnifiers not so large as a mite to 

 the naked eye; and in the larger sort, I can plainly see the little feet by which 

 they perform such brisk motions, which I never could find before. I have also 

 discovered another sort of animalcula, which are very slender long worms, of 

 which my pepper-water is exceedingly full : they are all of the same thickness, 

 but their lengths various, and at a medium I judge the proportion of their length 

 to their breadth at least as 50 to 1. Even to the greatest magnifiers they 

 look like shreds of horse-hair to a naked eye, from a quarter to 3 quarters 



