164 
FISHES. CHONDROPT. 
Ammoccetes- 
number and disposition of the teeth vary according to the age of the indivi- 
dual. — This species enters the rivers from the sea, in the beginning of the 
year ; spawns in March or April ; and, about mid-summer, returns again to 
the ocean. 
The jP. Jut(b^ which Dr MacCuUoch describes and figures in his “ Western 
Islands,” ii. 186, tab. xxix. fig. 1. probably belongs to this species, with which 
it agrees in external characters. The differences in the teeth are at present 
of doubtful value. 
Gen. II. AMMOCCETES. Pride. — Maxillary ring with- 
out teeth. Lips semicircular. 
^ 3. A hrancJiialis. Common Pride. — The two dorsal fins 
narrow, united with each other and with the tail. 
Lampetra parva fluviatilis, Merr, Pin. 188. Ray^ Syn. Pise. 36. — Petro- 
myzon branchialis, Linn. Syst. i. 394. Penn. Brit. Zool. iii. 80 — E 
Stone Grig. — In rivers in England. 
This species seldom exceeds 8 inches in length, and a quarter of an inch in 
diameter. The body is marked by numerous transverse lines, giving it an 
annulated appearance. Tail lanceolate — Frequent in the rivers near Ox- 
ford, and other places of England, lodging in the mud. 
Gen. III. MYXINE. Hag. — A temporal orifice. Mouth 
round, the margin with eight processes, and a single large 
tooth in the palate. 
4. M. glutlnosa. Glutinous Hag. — Dorsal fin narrow, con- 
tinued round the tail to the vent. 
Linn. Syst. ii, 1080, Penn. Brit. Zool. iv. p. 39, tab. xx- f. 15.— .On the 
English coast. 
Length about 8 inches. Body nearly cylindrical, and destitute of eyes or 
scales. Margin of the tongue, on each side, with a series of pectinated teeth. 
— This species, which seems to have been confounded with the preceding, by 
Willoughby and Bay, and which was placed by Linneus among the vermes, in- 
habits the ocean. It enters the mouths of fish when on the hooks of lines 
that remain a tide under water, and totally devours the carcase, except skin 
and bones. The Scarborough fishermen often take it in the robbed fish, on 
drawing up their lines. It is the Gastrobranchus of Bloch. 
Pristis Antiquorum. The late Dr Walker, in his MS. Adversaria for 1769, 
p. 41, when noticing some British fishes not in Pennant, adds, in reference 
to this species, “ Found sometimes in Loch Long.” I have not met Arith 
any other proof of its ever having visited the British shores. 
Gen. IV. SQUALUS. Sail-Fish.- — Teeth simple, conical, 
pointed. The first dorsal fin nearly above the pectorals. 
■’ 5. S. maximus. Common Sail-Fish.— Branchial apertures 
extending nearly across the neck, in front of the pectorals. 
Linn. Syst. 400. — Basking Shark, Penn. Brit. Zool. iii. 101. tab. xiii. 
Home, Phil. Trans. 1809, p. 208. — E, Sun-fish ; G, Cserban; N, Brug- 
de.— Common on the west coast. 
