414 PISCES (OSSEI) MALACOPT [CYPRINUS. 



altogether in advance of the dorsal, which last is directly over the inter- 

 vening space between them and the anal : 



D. 12; A. 14; C. 20; P. 16; V. 9. 



(Colours.) Upper part of the head, back, and sides, slate-blue, passing 

 into silvery white beneath, and both shining with metallic lustre : irides 

 white, tinged with pale straw-yellow : all the fins plain white ; the dorsal 

 and caudal inclining to dusky. 



A new species described by Mr. Yarrell from specimens received along 

 with the Graining from Knowsley in Lancashire. Not much at present 

 known of its habits. Said to be hardy, tenacious of life, and to spawn 

 in May. Weight of the largest individual hitherto obtained about a 

 pound. 



95. C. Alburnus, Linn. (Bleak.) Elongated: lower 

 jaw longest, ascending: anal with about nineteen rays: 

 bright silvery; fins pellucid white. 



C. Alburnus, Linn. Syst. Nat. torn. i. p. 531. Block, Ichth. pi. 8. 

 f. 4. Don. Brit. Fish. vol. i. pi. 18. Turt. Brit. Faun. -p. 109. 

 Leuciscus Alburnus, Flem. Brit. An. p. 188. Bleak, Will Hist. 

 Pise. p. 263. tab. Q. 10. f. 7. Penn. Brit. Zool. vol. HI. p. 370. 

 pi. 73. Id. (Edit. 1812.) vol. in. p. 487. pi. 84. Bowd. Brit. fr. 

 wat. Fish. Draw. no. 4. Yarr. Brit. Fish. vol. i. p. 368. L'Ablette, 

 Cuv. Reg. An. torn. n. p. 276. 



LENGTH. From six to seven, rarely eight, inches. 



DESCRIPT: (Form.) General form resembling that of the Dace, but 

 more elongated : greatest depth exactly one-fifth of the entire length ; 

 greatest thickness about half the depth : ventral line more convex than 

 the dorsal, rising rather abruptly posteriorly along the base of the anal 

 fin : head contained five times and a half in the entire length : forehead 

 flat : eyes large ; their diameter very nearly one-third the length of the 

 head: snout short; lower jaw projecting, ascending to meet the upper: 

 lateral line descending in a sweep from the upper angle of the 

 opercle till it reaches the middle of its course, thence passing off nearly 

 straight to the caudal; above the ventrals its course is at just two-thirds 

 of the depth : scales of moderate size, thin, finely striated, easily de- 

 tached ; number in the lateral line about forty-eight ; above it seven and 

 a half; beneath three and a half: dorsal entirely behind the middle; its 

 greatest height about two-thirds of the depth ; its length scarcely more 

 than half its height; first ray only half the length of the second; second 

 and third rays longest; the succeeding ones decreasing; the first two 

 simple, the rest branched: anal commencing in a line with, or rather 

 in advance of, the last ray of the dorsal ; longer than in any of the pre- 

 ceding species of this sub-genus, and occupying half the space between 

 the vent and the origin of the caudal fin ; the first two rays very short ; 

 third and fourth longest, about equalling the longest rays in the dorsal ; 

 the first three simple, the others branched: caudal forked for half its 

 length ; the lower lobe of the fin a very little longer than the upper : 

 pectorals shorter than the head, not reaching to the ventrals when laid 

 back : ventrals shorter than the pectorals, considerably before the dorsal, 

 and not reaching to the vent. 



D. 10 or 11 ; A. 19 to 21 ; C. 19, &c. ; P. 16 ; V. 9. 



