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Show 44 DR. J. MURIE ON IRREGULARITY [Jan. 13, Kulder (a rocky mountain-stream joining the river Tyne, in Northumberland), with the testicles fully developed. Column IV. to a Sewin, or Bull Trout (S. cambricus) from the Rhymney. A male in the Smolt state, before going down the sea. Column V. gives the admeasurements of one of the so-called hybrids between the Sewin (S. cambricus) and the River-trout (S. fario). " A young female from the Towey, caught in the month of August." Column VI. gives those of a male specimen of the S. nigripinnis, with testicles well developed. "From Llyn G-adr, caught in the month of August." Column VII. gives those of a perfect-conditioned male Salmon from the river Tweed. TABLE B. Total lengtb Distance from end of snout to eve Distance between eye and pra> Greatest width of operculum.. Greatest deptb of operculum.. Distance between occiput and origin of dorsal fin Distance between end of dorsal Lenetb, base of dorsal Lengtb of pectoral Distance between roots of pec- Length of ventral fin Distance between root of ven- Length of tbe anal Lengtb of longest caudal ray.. Length of middle caudal ray.. Zool. Soc. spec. No. 1, P Proc. 1868. in. 6-5 1*4 0-3 0*6 6-9 1-2 1-2 1*6 1*2 0*8 Zool. Soc. spec. No. 2, a Proc. 1868. in. 7-6 1*2 1-2 0*6 0-45 0-75 0-5 0-4 0*75 1*75 2-40 0-85 1-8 1-8 0-9 115 0-8 11 0-55 Salmon-parr, « B.M.Cat. p.21. ? in. 6-5 1-43 1-37 0*56 0*37 0*43 0-37 0-37 0-43 1-62 2-06 0-75 0-87 1-25 1-62 0-87 10 0*56 1*06 0-43 Sewin, Smolt, « B. M. Cat. p. 45. * in. 6*87 1-37 1-43 0-56 0-37 0-56 0-50 0-37 0-50 1-87 2-31 0-75 0*81 100 1-87 0*75 100 0-43 0-87 0-56 Hybrid? B.M.Cat. p.57. * in. 7*50 1-50 1-56 0*62 0-37 0-62 0-50 0*37 0*50 1-75 2-5 0-75 1-00 1-25 2-00 0-87 1-37 0-56 1-12 0-56 S. nigripinnis, ** B. M. Cat. p. 99. r in. 8-00 1-62 1-75 0-75 0-37 0-75 0-62 0-37 0-56 1-87 2-87 0-87 1-12 1-37 2-00 1-12 1-37 0*62 1*25 0*62 S. salar, ad., «j B. M. Cat. p. 16. F in. 46-0 11-50 10-50 3*33 4*50 3-75 3-33 2-12 30 14-0 150 4*66 4*50 5*50 12*5 4*66 10*5 3*33 600 Between the Society's two specimens there is a close agreement, the head of No. 1, however, being proportionally and absolutely the longest. The Parr (III.) corresponds to both, the main disagree- |
