444 MR. W. A. FORBES ON THE [May 16, 
towards their insertion, and dilated apically. There are two carotid 
arteries, 
In the leg, the ambiens and accessory femoro-caudal muscles are 
absent, as are the gluteus quintus and primus. The femoro-caudal, 
semitendinosus, and accessory semitendinosus are all well developed. 
The myological formula is thus —A.XY. The obturator internus 
is triangular. The deep plantar flexor tendons of the toes blend 
about three quarters down the leg, the slip to the hallux being given 
off from the inner of the two tendons a little before it joins the other 
one. 
The pectoralis secundus extends nearly to the end of the sternum. 
There is no third pectoral, nor biceps slip to the patagium. ‘he 
expansor secundariorum muscle, on the other hand, is well deve- 
loped, the long thin tendon ceasing on the axillary margin of the 
teres muscle in a way hitherto only known in some of the Gallinaceze!. 
I find, however, that exactly the same condition occurs in Momotus 
(lessoni) and Hylomanes (gularis), in some of the Alcedinide (e. g. 
Fig. 1. 
A 
Syrinx of Todus: A, from before; B, from behind. 
Tanysiptera, Syma, and Cittura), as also in Steatornis. The 
presence of this muscle at all in these groups of birds was, I may 
remark, hitherto unknown?. The tensor patagii brevis at its termi- 
nation has an arrangement almost identical with that of the Momo- 
tidz *, only differing from it in the absence of the thin slip of fascia 
which is continued, in them, from the recurrent “ passeriniform ” 
tendon to the fascia covering the ulnar side of the forearm. The 
deltoid has no special tendinous slip of origin from the scapula. 
1 Cf. Garrod, Coll. Papers, p. 324. 
* Besides the Coraciidex, the existence in which of this muscle was pointed 
out by Garrod (Coll. Papers, p. 324), it exists also of the same “ ciconiiform ” 
shape in the Meropide, Leptosoma (P. Z. 8. 1880, p. 470), and, as already noted 
in MS. by Garrod, in the Galbulidx, It is absent in all (? Bucconidx) the 
other families of Anomalogonate. 
° Cf. Garrod, loc. cit. p. 359, 
