HERODIONES 4l>o 



is but slight ; in Abdimia and Dissura episcopus it is well 

 shown. But the latter bird has the complete bronchidesmus 

 which marks the ciconiine as contrasted with the ardeine 

 syrinx (cf. figs. 194 and 198). In Mycteria americana the 

 bronchial rings are complete, but thinner internally, which 

 is a hint of the otherwise absent membrana tympaniformis. 

 The genus Tantalus is unique among the Ciconiidse in 

 having a convoluted trachea. This, however, is now known 

 to occur only in the male of T. ibis ; in both sexes of T_ 

 loculator the trachea is unconvoluted.' In the former bird 

 the tube makes several intrathoracic loops, as shown in the 

 figure (fig. 201) . The syrinx is essentially stork-like. 



In most storks the muscle formula of the leg is AXY + ; ^ 

 the only exceptions to this yet known are Xenorhynchus 

 senegalensis, Dissura episcopus, ajiA Abdimia sphenorhyncka, 

 where the ambiens is absent, and Leptoptilus crumejii- 

 ferus and a?-gala, where there is no femorocaudal. The 

 tendency to an ardeine structure in the syrinx of these 

 birds has already been remarked upon, and may possibly be 

 correlated with the absence of the ambiens. Storks have 

 no biceps slip, but a typical expansor secundariorum. The 

 humeral head of the anconseus is generally present. The 

 patagial tendons are usually of a somewhat complicated 

 form. 



The tensor patagii brevis is constituted upon a similar 

 plan in all storks, though there are naturally some little 

 differences in detail. 



In Leptoptilus, according to Wbldon,^ there is but one 

 tendon which, widening out just before its insertion on to 

 the fore arm, gives off a recurrent slip to the tendon of the 

 longus. 



In Ciconia nigra, according to Fuebeinger, the tendons 



' ' On the Trachea of Tantalus,' &c., P. Z. S. 1878, p. 625 ; ' On the Form 

 of the Trachea in certain Species of Storks and Spoonbills,' ibid. 1875, p. 297. 



^ A. H. Gakkod, 'Note on an Anatomical Peculiarity in certain Storks,' 

 ibid. 1877, p. 711. In a specimen of Xenorhynchus australis a few fibres corre- 

 sponding to the accessory femorocaudal were found. 



' Loc. cit. (on p. 419). . 



