Gasterosteus. fishes. ACANTHOPT. 
219 
Length 17 inches. Body oval, compressed, olive, blue, and white, with a 
round black spot on the side. 1st D. 10, 2d D. 24 ; P. 14 ; 1st A. 4, 2d A. 22; 
C. 14. Tail round. Spinous scales on the back and belly, at the base of the 
fins. Lateral line waved. — Willoughby mentions this fish as common in 
Cornwall. It is occasionally brought to the London market. 
Gen. LXXXV. SPINACHIA.— Lateral line armed with 
large pointed imbricated scales, Ventrals, of a single ray, 
supported by a spinous shield. 
'-^165. S. vulgaris . — Back with fifteen spines. 
Aculeatus marinus major, Sibb. Scot. 24. Will. Ich. 340. — Gasterosteus 
Spin. Linn. Syst. i. 492. Penn. Brit. Zool. iii. 263. Don. Brit. Fishes, 
t. 45.—In the sea rare. 
Length 6 inches. Snout produced ; mouth tubular ; teeth small. 2d D. 
7, P. 10, A. f, C. 12. Tail even at the end. 
Gen. LXXXVI. GASTEROSTEUS. Stickleback.— 
Ventrals of a single spine ; the bone of the pelvis forming 
an intervening shield, pointed behind. 
166. G. P. aculeatus . — Three spines on the back ; scales on 
the sides large, transverse. 
Pungitius, Merr. Pin. 189. Sibb. Scot. 25 — Pisciculus aculeatus. Will. 
Ich. 341. Gast. acul. Linn. Syst i. 489. Penn. Brit. Zool. iii. 261. 
Dm. Brit. Fishes, t. xi — Common in rivulets, ditches, and lakes. 
Length 2 inches. Body square near the tail. 2d D. 11, P. 10, A. i, C. 
12. A voracious fish. Spawns in April. Sometimes found in estuaries, 
after floods, where it attains a large size. 
V 167. G. Pungitius . — Ten spines on the back ; sides smooth. 
Piscis aculeatus minor, Will. Ich. 342. — G. Pung. Linn. Syst. i. 491. 
Penn. Brit. Zool. iii. 262. Don. Brit. Fishes, t. 32 — In the sea and 
rivers. 
Length about an inch and a half; olive above, white below. Dorsal spines 
irregular in their direction. 2d D. 9, P. 9, A. Tail rounded. 
Mr Couch states in reference to the Centronotus ductor.^ or Pilot-fish, 
that “ Two of this species a few years since accompanied a ship from the Me- 
diterranean into Falmouth, and were taken in a net.” — Linn. Trans, xiv. 82. 
Gen. LXXXVH. LAMPRIS. Opau— Snout short ; ven- 
trals abdominal. 
168. L. Luna . — Fins red; body above greenish blue, with 
silvery spots. 
Piscis maculis aureis aspersus, Sibb. Scot. t. vi. f. 3. Wallace., Ork. 37. 
— Opah, Penn. Brit. Zool. iii. 223. Sower. Brit. Misc. i. p. 45. t. 22. 
Dm. Brit. Fishes, t. 97. — In the British seas rare. 
