19 



The veTtehrsl formula was as follows: 



Cervical ' 



Dorsal 15 



Lumbar ' 



Sacral ^ 



Coccyeal ^ • 



The ribs consisted on each side of 8 true and 7 falše. 



Mr Yarrell exhibited a recently presen-ed example of a new spe- 

 cies of Swan. closely aUied in external appearance to the well-kno^vn 

 Domestic Swan, but having the legs, toes and mterdigital mem- 

 branes of a pale ash-grey colour, ^vhich m the Cygnusolor, lU.. are 

 deep black. Mr. Varrell observed. thatthis specieshad beenkno^n 

 to him for some years past as an article of commerce among the 

 London dealers in birds, who receive it from the Baltic, and di. 

 stinguish it by the name of the PoUsh Swan. In several mstances, 

 these swans had produced young in this country and the cygnets 

 when.hatched ^-ere pure white, likę the parent birds, and did not 

 assume at any age the brown colour bome for the firsttwo years 

 by the young of all the other known species of White Swans. 

 I^Ir. Yarrell considered that this peculiarity was sufhcient to entitie 

 the bird to be ranked as a distinct species. and in reference to the 

 unchangeable colour of the plumage, proposed for it the name of 

 Cvpnus immutabilis . ^ , . 



During the late severe weather, flocks of this swan were seen 

 pursuing a southem course along the line of our north-east coast, 

 from Scotland to the mouth of the Thames, and several specimens 

 were obtained. The specimen exhibited belonged to the Kev L. B. 

 Larking. of Ryarsh Vicarage, near Maidstone, for whom it had been 

 preserved. It was shot on the Medway, where one flock of thurty, 

 and several smaller flocks v.ere seen. 



Mr. Waterhouse exhibited a new species of Squirrelfrom the So- 

 ciety's Museum, and characterized it as : 



SciURUS suBLiNEATUs. Sc. supni fusco-olivūceus flūvescetite lūva- 

 tus ; lineis dorsalibus ąuatuor nigris tribus albescenttbus, a hume- 

 ris ad uropygium escurrentibus : abdomine flavescente : caudd m- 



aro flavoaue annulatd. 



^ J ^ unc. lin. 



Longitudo corporis ab apice rostri ad caudae basin. .6 0^ 

 ab apice rostri ad auris basin 1 2^ 



cauda; (pilis inclusis) O 5 ^ 



tarsi digitorumąue I 2^ 



auris ^ 2 



Habitat ? 



" This animal is less than the Palm Squirrel (Sciurus palmarmn, 

 Auct.),but likę that species hasfour dark andthree pale Įmes onthe 

 back • these lines, however, are very narrow. and occupy only the cen- 

 trai portion of the back ; they are not continued on to the shoulders, 

 neither do they estend over the haunches. The geaeral colour is 



