178 
; 
eed 
| ‘and the li 
MicROGRAPHIA. 
~ ‘Thirdly,that thofe which they call the eyes of Crabs,Lobfters,Shtimps, 
Ge and are really fo, are Hemi/pher'd, almoft in the fame man- 
ner as thefe. of Flies are. And that they really are fo, [have very often 
try'd; by cutting off thefe little movable knobs, and putting the creature . 
again into the water, that it would fwim to and-fro, and move:up and 
down as well as before, but would often hit it felf againft the rocks or 
ftones; and though I put my hand) juft before its hal, it would not at 
all {tart or fly back till I touch’d it, whereas whil ft. thofe were remain- 
ing, it would ftart back,and avoid my hand or a ftick at a good:diftance 
before it touch’d it. ' Aind if in crufiaceows Séa-animals, then itfeems very 
probable alfo,that thefe knobs are the eyes in cruftaceowsInfects, which are 
alfo of the fame kind} onely in a higher'and more attive Elements thisthe 
conformity or Congruity of many other parts common to cither of them, 
willftrongly argue,their cruflaceows armour,their number of leggs,which 
are fix, befide the two. great claws, which anfwer to the wings in Infects; 
and in all kind of Spiders, as alfo in many other Infects that want wings, 
we fhall find the compleat number of them, and not onely the number, 
but the very fhape, figure; joints, and claws of Lobfters and Crabs, as is 
evident in Scorpions and Spiders, as is vifible in the fecond F7gwre of the 
3.1, Scheme,and in the little Mite-worm,which I call a Land-crab,defcrib'd 
in the fecond Figure of the 33. 8cheme,but in their manner of generation 
being oviparous, @c. And it were very worthy obfervation, whether 
there be not fome kinds of transformation and metamorphofis in the fe- 
veral {tates of cruftaceous water-animals, as there is in feveral forts of In- 
fects ; for if {uch could be met with,the progrefs of the variations would 
be much more confpicuous in thofe larger Animals, then they can be in 
any kind of Infects our colder Climate affords. . dt 2 WO! 
-. Thefe being their eyes, it affords us a very pretty Speculation to Con- 
template their manner of vifion, which, as it is very differing from that of 
biocular Animals, fo is it not lefs admirable. 40. tab 
That each of thefe Pearls or Hemsi(pheres is a perfect eye, I think we 
need not doubt, if we confider onely the outfide or figure of any one of 
them, for they being each of them'cover'd witha tranfparent protube- 
rant Corzea,and containing a liquor within them, pr as the watry 
or glaffie humours of the eye, muft necefiarily refra& all the parallel 
Rays that fall on them out of the air, into a point not farr diftant within 
them, where (in all probability) the Retiza of the eye is placed,and that 
opacous, dark, and mucous inward coat that (I formerly fhew'd) 1 found 
to fubtend the concave part of the clufter is very likely to:be that t#- 
nicle or coat, it appearing through the Aficrofcope to be plac’d a little 
more than a Diameter of thofe Pearls below or within the tunicascorued: 
_ And if fo, then is therein all probability, a little Picture or Image of the 
objects without, painted or made at the bottom of the Retina againft 
every one of thofe Pearls, fo that there are as many impreflions on the 
Retina or opacousfkin, as there are Pearls or Hemz{pheres on the clutter. 
But becaufe it is impoffible for any protuberant furface whatfoever, whe- 
ther /pherial or other, {0 to refract the Raysthat come from farpremiee 
