. The structure and classification of birds . acopsis obscura, (not in C. nigra), Psittaculapasscrina, Machcerhamphus Andersoni, Heliodilus, Caprimulgus, Phactlioncandidus (not P. rubricauda), and Fregata minor. These instances are takenfrom the osteological plates illustrating MM. GKANDIDIEK and MiL\E-En\VAr,i>ssHistoire Naturellf. de Madagascar. :! For muscular anatomy of Lamias see GIEBEL, Beitriige zur Anatomied. Moven, &c., Zeitschr. /. d. ges. Naturw. x. (1857), p. 20; BEI>DAHI>, AContribution to the Knowledge of the Anatomy of Rliynchops,1 P. Z. S. 1896,p. 299. 352 STRUCTURE AN
. The structure and classification of birds . acopsis obscura, (not in C. nigra), Psittaculapasscrina, Machcerhamphus Andersoni, Heliodilus, Caprimulgus, Phactlioncandidus (not P. rubricauda), and Fregata minor. These instances are takenfrom the osteological plates illustrating MM. GKANDIDIEK and MiL\E-En\VAr,i>ssHistoire Naturellf. de Madagascar. :! For muscular anatomy of Lamias see GIEBEL, Beitriige zur Anatomied. Moven, &c., Zeitschr. /. d. ges. Naturw. x. (1857), p. 20; BEI>DAHI>, AContribution to the Knowledge of the Anatomy of Rliynchops,1 P. Z. S. 1896,p. 299. 352 STRUCTURE AND CLASSIFICATION OF BIRDS those of other limicoline birds, but are apt to be a little morecomplicated. In Larus argentattis, of which the tendons arerepresented in the annexed cut, the anterior stronger branchof the brevis tendon gives off a forwards and downwards slipto the extensors of the fore arm, from which arises the usualconnection with the long us tendon. There is a second con-nection between the two tendons. At the origin of the. FIG. 171.—TENSORES PATAGII OF lllujncliops (AFTER BEDDAED). , teusor longus ; , tensor brevis; B, wristward slip ; F, patagial fan ;A, tendons to ulnar side of arm. patagial fan is a bony nodule, as in the petrel. The tensorlongus tendon also gives off a slip (A, fig. 172) to the insideof fore arm which is also present in the auks () InRliyncliops (fig. 171, A) there are two such tendons. Lestris antarctica, Sterna, and Larus marinus (accordingto FUEBEINGEES figure, PI. xix.) are much the same, but arewithout the additional slips A and B. Of these A is presentin Eissa tridactijla. The expansor sccundariorum is frequently absent, but it 353 is present in Larus argentatus, marinus, and glaucus, notinfuscus. It is absent in Sterna and Lestris ; present inAnous ; absent again in Ehynchops. Tbe biceps is peculiar in some members of this Larus, Sterna, and Anous the biceps has, as usual, thetwo heads, humeral and
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