Body rounded anteriorly, compressed behind: sides of the head unarmed.
C. barbatula, Linn. Syst. Nat. torn. i. p. 499. Bloch, Ichth. pl. 31. f. 3. Don. Brit. Fish. vol. i. pl. 22. Turt. Brit. Faun. p. 103. Flem. Brit. An. p. 189. Loche, Will. Hist. Pise. p. 265. tab. Q. 8. f. 1. Penn. Brit. Zool vol. iii. p. 282. pl. 58. Id. (Edit. 1812). vol. iii. p. 379. pl. 69. Bowd. Brit .fr. wat. Fish. Draw. no. 12. Yarr. Brit. Fish. vol. i. p. 376. La Loche franche, Cuv. Reg. An. torn. ii. p. 278.
From four to four and a half, rarely five, inches.
(Form). Elongated; subcylindric anteriorly, compressed towards the tail: greatest depth one-seventh of the entire length; thickness, in the region of the pectorals, about two-thirds of the depth: head small, a little depressed, the profile gently sloping: snout blunt; upper jaw projecting over the lower; mouth small, placed beneath, furnished with six short barbules, two at the corners, and four in front of the upper lip; those at the corners longest, equalling rather more than one-third the lenjgth of the head: eyes small; the intervening space flat: body covered with very small scales, and invested with a mucous secretion: lateral line straight: dorsal commencing midway between the end of the snout and base of the caudal; its height nearly equalling the depth of the body; first ray very short and easily overlooked; second not half the length of the third; fourth and fifth longest; the first three simple; the rest branched: anal commencing beyond the tip of the dorsal when laid back, somewhat smaller than that fin, but in other respects similar; first ray very small; fourth and fifth longest: caudal slightly rounded: pectorals attached low down, about the length of the head, rounded; second and third rays longest, and, as well as the fourth, much stouter than the others: ventrals in a line with the commencement of the dorsal, somewhat shorter than the pectorals; third ray longest:
B.3; D. 10; A. 9; C. 17; P. 12; V. 8: vent in a line with the tip of the dorsal when laid back. (Colours). Back and sides yellowish brown, mottled and spotted with dusky; abdomen and lateral line whitish: dorsal, caudal, and pectoral fins, spotted; anal and ventrals nearly plain.
Not uncommon in rivers and streams with a gravelly bottom. Feeds on aquatic insects. Spawns in March and April.