226 Zoological Society. 



jaw. This circumstance is interesting in connection with the me- 

 morable dispute between Dr. Monro (primus) and the French ana- 

 tomists, concerning the actions of this muscle; and it is remarkable 

 that Winslow, with his accustomed ingenuity, should have alluded 

 to such a disposition, in illustrating his opinions of the actions of the 

 digastricus on the lower jaw in the human subject. Some peculiarities 

 in the mylo-hyoideus, genio-hyoideus, sindomo-hyoideus were noticed. 



The peculiar muscle discovered by Tyson in the Chimpanzee, and 

 called by him levator clavicular, arises in the Orang Utan from the 

 occiput and transverse process of the atlas. In the Chimpanzee 

 which Mr. Owen dissected, he also found it arising from the trans- 

 verse process of the atlas, and not from the second or third cervical 

 vertebra. It is inserted broadly into the humeral extremity of the 

 clavicle. 



Neither in the Orang Utan nor in the Chimpanzee is there any true 

 ligamentum nuchtz. The part commonly so called in the human 

 subject, consisting also in these animals only of the inelastic com- 

 missural tendons of the trapezii, the rhomboidei and the serrati 

 postici superiores. To give additional support, however, to the head 

 of the Orang Utan, which preponderates so far anterior to the oc- 

 cipital foramen, the origins of the rhomboidei are extended upwards 

 to the occipital bone, to which they broadly adhere, beneath the 

 trapezii. In the Chimpanzee this disposition does not occur, but 

 in both animals the rhomboideus is a single muscle, without division 

 into a greater and lesser portion. 



Three muscles supply the place of the pectoralis major in the 

 Orang Utan. Their proportions and attachments were minutely 

 described; and while speaking of these with reference to each other, 

 it was found convenient to apply to them the names of sterno- 

 humeralis, costo-humeralis, and sterno-costo-humeralis. 



The reading of the remainder of this part of the anatomy of the 

 Orang Utan was postponed to a future meeting of the Committee. 



Several species of Birds belonging to the collection recently 

 made by Capt. Philip P. King, R.N., during his survey of the Straits 

 of Magellan, were exhibited. Other birds from the same collection 

 had been named and characterized! at the Meeting on the 14-th of 

 December : and on the present occasion Capt. King pointed out 

 the distinctive characters of the following species which he believed 

 to be new. 



SYNALLAXIS ANTHOIDES. Syn. supra brunnea, plumis in media 

 fusco late striatis, tectricibus alarum superioribus rufo tinctis ; 

 subtus pallide cinerea ; rectricibus lateralibus ad marginem exler- 

 num,fa.<iciaque alarum, rujis. 



Statura Syn. Spinicaudce. 



DENDROCOLAPTES ALBO-GULARIS. Dend. corpore supra abdo- 

 minisque lateribus rufo-brunneis ; remigibus sccundariis, dorso 

 imo, caudaque rufis ; mandibuld inferiori ad basin, gula,jugulo, 

 pectorc, abdomineque media albis, hujus plumis brunneo ad api- 

 cem marginatis ; rostra sursum recurvo. 



Longitude circiter 7v uncias. 



TROCHI- 



