SaUATINA. 
FISHES. CHONDROPT. 
169 
lem versus oculum. Pinn^: dorsum suberectum muticum bipinne. Pin- 
na dorsalis antica erecta, subpedalis, circa medium corpoiis. Pinna dorsalis 
postica, multo minor, medium inter pinnam anticam et caudam occupat. 
Pinnae pectorales pedem longitudine superant, et ante pinnam anticam dorsa- 
lem positae sunt. Pinnae ventrales spatiam ante pinnam dorsalem posticam 
occupant. Cauda, perpendicularis furcata segmentis subaequalibus suba- '' 
cutis ; superiori longiori. — Sore prolate, maxillis subaequalibus ; superiore trun- 
cata emarginata. There is not a vestige of this animal in Linnaeus, Wil- 
loughby, Artedi, or Pennant.” The form of the snout, the position of the 
fins, and the relation of the gill-openings to the pectorals, mark a distinct 
species, and even genus, which may be termed Selanonius Walkeri. 
The remains of the teeth of many species of sharks occur in the different 
strata, from those of the independent coal formation, to the more recent series 
of marine deposits. They constitute the Glossopetrae of the older writers. 
Gen. XII. SQUAT IN A. Monk-fish. — Body depressed. 
Temporal orifices. No anal-fin. 
16. S. vulgaris. — Pectorals large, armed in front with short 
pointed curved spines. 
Squatina, Merr. Pin. 186. Sibh. Scot. 24. Will. Ich. 79* — Squalus Squa- 
tina, Linn. Syst. 398* Penn. Brit. Zool. iii. 98. Don. Brit. Fish, 
tab. xvih — Monkfish and Lewis, Couch, Linn. Trans, xiv. 90. — E, 
Kingstone, Angel-fish. — On the coast. 
Length 5 to 8 feet. Body above, brownish-grey, white beneath ; the skin 
rough. Head broad, einarginate in front. Teeth numerous, broad at the 
base, pointed above. Tongue broad, sharp, pointed. Tubercles or spines 
near the eyes. A rough line down the middle of the back. Two dorsal fins 
near the tail, which is divided into nearly equal lobes. This fish keeps near 
the bottom, and is only taken in nets. It is fierce and dangerous to be ap- 
proached. The size of the pectorals, resembling wings, has procured for it 
the name of Angel-fish. 
Gen. XIII. TORPEDO. Cramp-fish. — Sides of the snout 
rounded. Furnished with electrical organs. 
^ 17. T. vulgaris. Common Cramp-fish. — Skin smooth. 
Baia Torpedo, Linn. Syst. i. 395. Walsh, Phil. Trans. 1773, p- 461. 
tab. XIX., and ib. 1774, p. 464. Penn. Brit. Zool. iii. 89 On the 
southern English and Irish coasts. 
Length about 2 feet. Colour, usually brown above, and Avhite beneath. 
Head and body nearly round. Mouth small, teeth minute. Temporal ori- 
fices with fringed margins. Eyes small. The two dorsal fins placed near the 
caudal, which is broad and abrupt. This species was first recorded as occurring 
on the Irish coast, by Smith (Hist. Waterford, 271., Pennant), and afterwards 
noticed by Walsh, as not uncommon on the English coast. If the colour- 
markings be assumed as suitable characters for distinguishing species (in op- 
position to the testimony of Mr Tod, Phil. Trans. 1816, p. 21.), the British 
species will belong to the T. marmorata of Risso, Ich. Nice, 18. 
Gen. xiv. TRYGON. — Head uniting to form with the 
pectorals an obtuse angle. Teeth granulated. 
