ON THE ANATOMY OF THE EURYL^MID^E. 139 



of Cymbirliynclius, Calyptomena, and Eurylcemus ochromelas, to show that 

 these species differed singularly from all other Passeres yet examined in 

 that in them the tendon of the flexor longus hallucis sends a strong 

 vinculum to the tendon of thejf&eor digitorum profundus, as in nearly all 

 other non-passerine birds in which a hallux is developed. He also showed 

 at the same time that in these species the palate was truly Passerine, and 

 proposed to divide the order Passeres " into two sections to start with, 

 those with the hallux not free (the Eurykemidae), and those with the 

 hallux independently movable." The following year he was able to add 

 to this account some facts in the anatomy of two other species, Psarisomus 

 (lalliousice and Serilophus rubropygius. These facts included the typical 

 Passerine arrangement of the tendon of the tensor patagii brevis (P. Z. S. 

 1876, p. 508), the presence of the left carotid only, the normal disposition 'p/382. 

 of the vessels of the thigh, the presence of the femoro-caudal, semiten- 

 dinosus and accessory semitendinosus, and the absence of the ambiens and 

 accessory femoro-caudal muscles. He also called attention to the un- 

 forked condition of the sternum in Psarisomus, this feature resembling 

 that figured previously by Mr. Sclater in Oymbirhynchus. 



Having lately, through the kindness of Mr. Edward Gerrard, jun., 

 become the possessor of a specimen each of Cymbirhynckus macrorhynchus 

 and Eurylcemus ochromelas from Sarawak, excellently preserved in spirits, 

 I am in the position to supplement the above-mentioned facts in our 

 knowledge of the anatomy of the Eurylcemidce by describing the syrinx 

 and alimentary canal, previously hardly known at all in this group, 

 in these two species, as well as of confirming or modifying previously 

 published statements. 



As regards osteology, the only point I wish to record is the unforked 

 condition of the manubrium sterni in both species. In this respect they 

 resemble the condition present in Psarisomus, as already noticed by Prof. 

 Garrod. As this feature appears equally in Mr. Sclater's figure of 

 Cymbirhynchus above alluded to, as well as in a specimen of the sternum 

 of that bird in the College of Surgeons, and in Mr. Eyton's figure of 

 Cory don sumatranus (Osteol. Av. pi. 8. fig. 5), it seems probable that it 

 is a regular character of this family of Passeres, though in other families 

 of that group it seems to be an individual or specific characteristic. 



~P *7 Q 1 ^ftO 



Both the species under discussion agree entirely with Psarisomus and pggS 

 Serilophus in the points already noted by Prof. Garrod. I may add that 

 the pectoralis primus is large, as is also the pectoralis secundus, this muscle 

 extending to the end of the sternum, or thereabouts. As in other Passeres, 

 the biceps-slip to the patagium and the evpansor secundariorum are absent. 

 The semimembranosus is slender, but muscular. The gluteus primus is 

 large, covering the biceps ; and the obturator internus is elongatedly oval. 

 As will be seen in fig. 1 (p. 140), in CymbirJiynclius the vinculum in the 

 deep plantar tendons is strong, and has the character of a firm round tendon, 



