1)2 PROF. A. H. GARROD ON THE [Feb. 4, 



facts to add. I may, however, mention that it is only in the Cra- 

 cidse, among allied birds, tliat the vomer runs so far forward in the 

 palate at the same time that it is tumified at its anterior extremity. 

 In Ortalida alhiventris this is most strikingly the case. 



The alimentary canal has been so fully described by L'llermiuier', 

 that it is quite unnecessary for me to enter into detail with reference 

 to it. 



Johannes Mlaller^ has noted one or two points concerning the 

 windpipe. Figs. 1 and 2 (pp. 110, 111) represent its anterior and 

 posterior aspects. The lowermost four tracheal rings are consolidated 

 together, and the first pair of bronchial semirings with them, to form 

 a box-like three-way piece, the pessulus posteriorly running up to join 

 the middle of the penultimate ring. The second pair of bronchial 

 semirings does not articulate with the first, they iu all respects 

 resembling those nearer the lungs. 



It is possible that what is above considered to be the first pair of 

 bronchial semirings may be the last tracheal ring. That there is a small 

 notch interrupting the continuity of the inferior mid-anterior margin 

 of the tube formed by the consolidated rings, and that the ring 

 above the lowest segment of the consolidated tube is incomplete 

 behind, are, however, facts in favour of the former view. 



Among the Gallinse the only genera which at all approach Opis- 

 thocomus, as far as the lower larynx is concerned, are those of the 

 Megapodidae. 



The two carotid arteries of Opisthocomus, where they meet in the 

 front of the neck, become bound together much more intimately than 

 in most birds, although at the part where it is impossible to dissect 

 away the one vessel from the other, a cross section proves that the 

 two tubes are still quite separate. 



INIyologically, the great gluteus (tensor fasciae of my earlier papers) 

 completely covers the biceps cruris superficially. The fifth gluteus, 

 which runs from the ilium a short distance behind the acetabulum, 

 and covers with its triangular tendon the trochanter of the femur, is 

 present, but small. The semitendinosus and its accessorius are both 

 large, as are the femoro-caudal and its accessorius. The myological 

 formula', as far as these muscles are concerned, is therefore AB XY. 

 The ambiens muscle is present and small ; but its slender tendon, in 

 every case but one of the six knees I have examined, is lost upon the 

 capsule of the front of the knee. In the one instance it traversed 

 the fibrous tissues of the quadratus-tendon, as in other birds whern 

 it is present, to join the digital flexors in the back of the leg. A 

 similar imperfection in the development of the ambiens is sometimes 

 found in Sula bassana, Stringops hubroptilus, and in the species of 

 the genus CEdicnemus. The obturator iiiternus is triangular in 

 shape, as in the Gallinse. 



In the deep tendons of the foot, the flexor hallucis longus sends a 



' Coniptes Eendus de I'Acad. des Sciences, 18.37, vol. v. p. 43.3. 

 ^ Bei'iclite Akad. d. Wis.senschaft. z. Berlin, 1841, p. 177. 

 ^ Fide F.Z.S. 1874, p. 111. 



