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Show 1890.] FIN-SKELETON OF BATOID FISHES. 685 TABLE OF FORMULA OF THE FIN-RAYS FOR THE SPECIMENS DISSECTED. Forms examined, with total length in centims. RHINOBATID-E. Rhinobatus columnce, <$,43b Rhinobatus granulatus, tf, 23 5 (fig. 8, p. 678) Rhynchobatus djeddensis, §, 52 Rhynchobatus djeddensis, <-?, 66 Trygonorhina fasciata, J, 26 , -RAIID.E. Raia batis, Raia clavata, Raia macidata, var. adults Raia clavata: juv.,12-5 juv.,13-5 Raia radiata, $ $ (fig. 7, p. 678) TRYGONID-£. (Measured to end of pelvic fins.) Pteroplatea hirundo: 6,23-5 (fig. 1, p. 676) tf,40(fig.2, p. 676) Trygon pastinaca C..39* $,71 2,74 2,108 2,160 (fig. 9, p. 681) Trygon uamak: 2.27 c?,34 2,36 Urolophus testaceus'. o*,38 2.412 MYLIOBATID-E. Myliobatis aquila: 2.23 j> 27'5 2.29-5(fig.3',p."676T.., TORPEDINID.E. Astrape dipterygia, <J\17 Hypnos subnigrum: 2.32 2,42 Torpedo marmorata, S, 22 Torpedo narce, <$, 37 (fig. 10, p. 681) Mesopterygial rays fused to form mesopterygium. 7-8 6-7 4-5 5-6 7-8 9-11 9-11 8-9 6 10-12 11-13 8-11 8? 8? 7-9 10-11 6 5-6 11 8-9 in apposition with limb-girdle. 4 4 3-4 3-4 4 3-5 3 3-4 4 8-10 all 5 5 3^4 3 4-5 4-5 4-5 5 5 5 2-3 3 2-3 2-3 3 Neo-pterygial rays. 3-4 4-5 3-4 3-4 5-6 3-7 7 6 4-5 11-13 12-13 9-12 14-16 ? 14-15 ? 12 :?? Total. 1 Pterygia all united on one side. 2 Mesopterygium fused posteriorly with metapterygium. PROC. ZOOL. Soc-1890, No. XLVI. 46 10-12 10-12 7-9 8-10 12-14 12-18 16-18 14-15 10-11 21-25 23-26 14-16 12-14 11-13 10-11 20 24 23-24 18-21 14 15 22-24 22-23 19-21 10-11 6 5-6 11 10-11 |
