SALMON TRIBE. 



5°5 



into a shallow notch of which it is fitted. As a representative of this latter group we 

 take the pigmy marane (C. albula) of Northern Europe, shown in the upper figure 

 of the illustration. Pollan, which grow to a length of about 6 inches, are largely 

 sold in Belfast during the spawning-season, at which time they come up from the 

 deep waters of Lough Neagh to the shallows. At times they occur in enormous 

 numbers, upwards of seventeen thousand having been taken on one occasion in the 

 early part of this century. 



Grayling. 



PIGMY MARANE AND MAI1AXE (\ luit. size). 



The last of the salmonoids that we have space to notice are the 

 grayling, of which the European species ( ThymaUus vulgaris) is shown 

 in the upper figure of the illustration on p. 501. Nearly allied to the coregonoids, 

 the grayling are readily distinguished by the greater height and length of the 

 dorsal fin, which includes from thirteen to twenty-three rays. The cleft of the 

 mouth is also smaller, and the maxilla of small size. Small teeth arc present 

 in the jawbones, as well as on the palatines and the head of the vomer, but they 

 are wanting on the tongue. The blind appendages of the intestine are less 

 numerous than in either the salmon or the coregonoids, and th«' air-bladder is 

 unusually large. The range of the genus includes a large portion of Europe, 

 Northern Asia, and the colder regions of North America. The common species is 

 found locally over a great part of Europe, ranging from Lapland to Venice, and 

 from England to Russia. It is, however, unknown in Ireland, and lias only been 

 introduced of late years into Scotland; while in England it is most abundant in 

 the rivers flowing" from the limestone Pennine chain in the north, and the lied 



