18/1.] ON THE MYOLOGY OF THE KINKAJOU. 547 



of the Sanderling which had been seen in England ; but an examina- 

 tion of the present series shows that an egg which he obtained in 

 Iceland in 1858, and also exhibited, must in all likelihood be attri- 

 buted to the same species. 



Prof. Macdonald, of the University of St. Andrews, exhibited a 

 series of specimens illustrative of the cranial bones of fishes. 



An extract was read from a letter addressed to the Secretary by 

 Mr. "Walter J. Scott, C.M.Z.S., dated Valley of Lagoons, Queens- 

 land, March 16, 1871, stating that Mr. Haig, a planter on the 

 Lower Herbert, had lately caught alive an apparently full-grown 

 specimen of the Australian Cassowary (Casuarius australis), and 

 was anxious to present it to the Society, if he could find an oppor- 

 tunity of sending it down to Sidney. 



The following papers were read : — 



1. On the Myology of the Limbs of the Kinkajou (Cerco- 

 leptes caudivolvulus) &c. By J. Beswick-Perrin. (Com- 

 municated by Professor Flower, F.R.S., V.P.Z.S.) 



[Received June 19, 1871.] 



I am indebted to Professor Flower for his kindness in allowing me 

 the privilege of dissecting this interesting and beautiful animal, 

 recently one of the inmates of the Society's Gardens. 



To the description of the muscles of the Kinkajou I have added 

 some remarks on the myology of the limbs of the Paradoxurus typus 

 and Caracal (Felis caracal), more particularly mentioning the chief 

 points of difference between them. 



The sterno-mastoid consists of two portions, an anterior and ex- 

 ternal, and a posterior and internal. 



The former is smaller than the latter. It arises from the apex of 

 the manubrium sterni, being overlapped at its origin by the anterior 

 fibres of the pectoralis anticus muscle ; opposite the middle of the 

 neck it divides into two nearly equal-sized slips ; the outer of the two 

 is inserted fascial into the occiput ; the inner one joins the outer side 

 of the deeper division to be inserted along with it into the mastoid 

 process of the temporal bone. The posterior or internal portion is 

 half as large again as the preceding ; it arises from the summit of 

 the manubrium along with its fellow of the opposite side. It is in- 

 serted with the inner division of the preceding into the mastoid pro- 

 cess of the temporal bone. In the Paradoxurus the sterno-mastoid 

 is a single muscle ; it is inserted into both the mastoid of the tem- 

 poral and the occipital bones. In the Dog it is a single muscle at 

 its origin, bifurcating into two near its distal extremity, one to be 

 inserted into the digastric groove, the other into the lateral part of the 

 os occipitis (Douglas). 



