. On the Organization of the Brachiopoda. er; ^, ^, channelsof the lateral branches of the great pallial sinus; h^ channels of intermediatesmall branches of ditto. Fig. 6. Proximal extremity of peduncle :—a, horny sheath; h, muscular cylinder seenthrough ditto; c, extremity of muscular cylinder or peduncular muscle;d, triangular process of horny sheath, fitting into a corresponding depressionin the umbo of the ventral valve. Fig. 7. The same extremity of peduncle, with the horny sheath laid open:—^, hornysheath; h, muscular cylinder; c, c, delicate membrane coating ditto. Fig. 8. Portion of th
. On the Organization of the Brachiopoda. er; ^, ^, channelsof the lateral branches of the great pallial sinus; h^ channels of intermediatesmall branches of ditto. Fig. 6. Proximal extremity of peduncle :—a, horny sheath; h, muscular cylinder seenthrough ditto; c, extremity of muscular cylinder or peduncular muscle;d, triangular process of horny sheath, fitting into a corresponding depressionin the umbo of the ventral valve. Fig. 7. The same extremity of peduncle, with the horny sheath laid open:—^, hornysheath; h, muscular cylinder; c, c, delicate membrane coating ditto. Fig. 8. Portion of the wall of the perivisceral chamber, with part of the testis adhering:—a, wall of chamber; h, testis, exhibiting spermatophora in various stages ofdevelopment. Fig. 9. Three spermatophora, highly magnified:—a, a, two of ditto, apparently fullydeveloped, containing spermatozoa; b, one, immature, exhibiting a doubleline in the interior. Fig. 10. Two spermatophora, in an early state of development. ;^ LIl,philtrans05075373. 79
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Keywords: ., bookcentury1800, bookdecade1850, bookidphiltrans050, bookyear1858
