Part I. Of Fijbet. p 9 
of a Yelk, as in the Ovary of a Hen. Thefe fucceftively 
ripening, are found in the lower part,, confifting of Selfc 
and White, and cover'd with the faid horny Cafe. Out of 
every one 6f thefe mature Eggs, another Pcetm is alfo fuc- 
ceflively generated. Whereby it is intelligible, How this 
Filh produceth but one at once, and yet fo numerous a 
breed. 
The SKREW-GUT of the RAJA, defcribed by S tends 
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 knobcd TAIL of a THORNBACK. Ofanafli- 
colour, and about a yard long. 
Thefpiked TAIL of a THORNBACK, almoft black. 
The knobs of both are fo hard, that they will hie Iron or 
Brafs. The Skin of this Fifh is ufed for Knife-hafts, ckc 
The fmooth CAT-Fifh. Paftinaca viarina Iczvk. 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 (hall give the De- rclt * 
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, 1 fuppofe, 
thruft out fomewhat more than the natural dimenfion by 
the fluffing) in height. His Eyes ? an inch long, two and I 
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 5 and extended 
towards the fide-Fins, wherewith it is I alfo joyned by the 
mediation of a Skiny-Border * an inch broad. His Mouth 
very little, not an inch and * over 3 curioufly rough-caft 
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 i 
long. 
O 2 The 
