1901.] ANATOMY OF ANASTOMUS. 369 



ambieiis is rather small, as in Xeaorlv/nchus imstralis (it is of course 

 absent in X. senegalensis), but plainly obvious. 



The scridtendinosus is smaller than the semimembranosus, it 

 ends in the septum between itself and its accessory and in a thin 

 tendon which joins the broad flat tendon of the semimembranosus. 



The femoro- caudal is of fair size and has a fleshy insertion ; there 

 were no traces of its accessory. 



The r/lutanis ^naximus is mainly tendinous ; its origin hardly, if 

 at all, extends behind the acetabulum. I find four other (jlutcnV, 

 of which tertius and quartus are inserted so near together as to 

 appear at first sight but a single muscle. A little care, however, 

 shows them to be distinct. 



The two adductors are separated at their insertion, one being 

 attached as usual with the femoral head of the accessoiy semi- 

 tendiuosus. 



There is only one jyeroaeus, the ^>. hrevifs being absent. 

 The gastrocnemias has three heads and is joined by the accessory 

 semi-tendiuosus. 



The deep flexor tendons have the Ciconiine arrangement, a strong 

 vinculum joining the flexor hallucis to the flexor communis just 

 before the tri Furcation of the Litter. 



Skidl. — Judging from the measurements giving by Dr. Blanf ord ", 

 the skull of my example of Anastomus oscitans is about two-thirds 

 of the size to which it would ultimately have grown. It therefore 

 shows certain but not very numerous sigus of immaturity ^ I 

 have been able, however, through the kindness of Mr. Gerrard, to 

 compare it with the skull of an older example of Anastomus 

 lamelligerus. The principal specific difference which I observed 

 was the greater length of the beak-region of the skull in A. lamelli- 

 gerus as compai'ed with other Storks. Anastomus shows some 

 peculiarities of skull-structure. 



I could find no trace of a vomer in either specimen, a bone which, 

 though small, is usually recognizable in Storks. 



The pterygoids are unusually short and very broadly expanded 

 where they come into relation with the palatines. This character of 

 the skull of Anastomusis shown in the accompanying drawing (text- 

 fig. 91, p. 370). The most salient diiference, however, observable 

 in this aspect of the skull is the form of the quadrate, that is of 

 its articular surface for the attachment of the lower jaw. It will 

 be noted that in Anastom,us the quadrate has two facets — one longer 

 saddle-shaped facet at right angles to the longitudinal axis of the 

 skull; the other shorter at the jugal end of the under surface of 

 the bone, much shorter than the first and more or less at right 

 angles to it. The articular surface of the quadrate is therefore very 

 narrow, and in this contrasts with the genera Oiconia, Tantalus, 

 Xenorhynclms, and Dissura. In all these genera the lower articulai' 

 surface of the quadrate is very broad, and tlie two main facets are 



1 Weldon only found three in the Stoi-ks dissected by himself. 

 - The Fauna of British India, Birds, vol. ii. p. 878. 

 ^ It is, for instance " achizognathous."- 



