14 
and posterior side of second and third pairs of femora black ; scutel- 
lum at the end covered with yellow hairs; elytra of a clear ochre 
yellow, the base from the shoulder to the suture edged narrowly with 
black ; a transverse black band before the middle, nearly but not 
quite touching the edge and the suture, widest toward the suture ; 
another transverse black band just behind the middle, and neither 
touching the edge nor the suture, narrower than the first band, and, 
like it, waved both in front and behind. 
Hab. China (Hong Kong). John Bowring, Esq. 
This seems allied to the L. Assamensis, Hope. In the present 
unsettled state of the Longicorn Coleoptera it would be rash to found 
genera on mere isolated species; but it is difficult to refer the pre- 
sent to any of the modern genera ; it comes perhaps nearest to Cero- 
sterna. 
The figures represent the insects of the size of nature. 
January 22, 1850. 
Matthew Truman, Esq., M.D., in the Chair. 
The following papers were read :— 
1. DrEscriIPTION OF A NEW SPECIES OF CHRYSODOMUS, 
FROM THE MOUTH OF THE MACKENZIE RIVER. 
By J. E. Gray, Esa., F.R.S. etc. 
(Mollusca, Pl. VII.) 
Sir John Richardson, M.D., on his retura from the Arctic search- 
ing expedition, kindly presented to the Museum a series of shells 
which he had collected between the mouth of the Mackenzie River 
and Cape Parry: several of them were broken by the extreme cold 
during the wintering of the expedition at Great Bear Lake. 
The collections consisted of the new Chrysodomus here described, 
and the following species, which are exactly similar to the species 
brought home by Ross, Parry, and the other arctic voyagers from 
Baffin’s Bay, and are interesting as showing that these species are 
found more than half-way towards the Northern Pacific Ocean ; viz. 
Saxicava arctica. Very like S. rugosa, but larger. 
Hiatella arctica. Very large size, with the hinge-teeth almost 
entirely obliterated. 
Mya truncata. 
Glycimeris siliqua. All young. 
Cardium Grenlandicum. On the shores. 
Crassina semisulcata, Leach, not Miiller. In the mouth of the 
river: eaten by the birds. 
Buccinum glaciale. 
The egg of a large species of Natica was abundant on the sands, 
probably N. ampullaria, Lamk.? 
