« — 1 — — " 1 — ' 
Part I. Of Fijhes. 99 
of a Yelk, as in the Ovary of a Hen. Thefe fucceffively 
ripening, are found in the lower part, confiding of Yelk 
and White, and cover d with the faid horny Cafe. Out of 
every one of thefe mature Eggs, another F<etm is alfq fuc- 
ceffively generated. Whereby it is intelligible, How this- 
Fifh produceth but one at once, and yet fo numerous a 
breed. 
The SKREW-GUT of the RAJA, defcribed by Stem's 
Son. Sent by Dr. Swammerdam with fome other particulars 
mention' d in the firft Section. It winds between parallel 
lines like a Screw or Stair-cafe. 
The knobed TAIL of a THORNBACK. Of an afli- . " 
colour, and about a yard long. 
Thefpiked TAIL of a THORNBACK, almoft black. 
The knobs of both are fo hard, that they will file Iron or 
Brafs. The Skin of this Fifh is ufed for Knife-hafts, &ci 
The fmooth CAT-Fifh. Paftinaca marina l<zvfc: Fabius 
Columna, (a) hath defcribed two Species of this kind : but (a) Lib< dc 
both of them feem to be different from the Fifh here. It is Aq. & Ter- 
fomewhat phantaftically fluffed $ yet I fhall give the De- rdt ' 
fcription as well as it will admit. 
From the tip of his Snout, to his Tail, a foot and three 
inches, about a foot over, and? a foot (being, I fuppofe, 
thruft out fomewhat more than the natural dimenfion by 
the fluffing) in height. His Eyes ? an inch long, two and * 
inches diftant, three and * behind his Nofe-end. Juft be- 
hind his Eyes,and a little more diftant, he hath two Spouts, 
one way, an inch and * over. His Snout prolonged for- 
ward an inch and * with an Obtufe Angle 3 and extended 
towards the fide-Fins, wherewith it is alfo joyned by the 
mediation of a Skiny-Border * an inch broad. His Mouth 
very little, not an inch and * over $ curioufly rough-caff 
like a file, underneath, and behind his Snout-end two inches 
and i Over his upper Chap hang two little Labels above * 
inch long. 
His Gills are five on each fide, but towards the middle of 
his Belly. He hath four fide-Fins. His fore-Fins are 
ftretched out two inches in breadth, extended in length 
towards the Tail , almoft a foot. The hinder-Fins are 
almoft two inches broad , and above an inch and '* 
long. 
O 2 The 
