132 FISH HARVESTING. 
thing of reasonable size venture near—then head 
down, and plying all his propellers to their 
utmost power, he charges at them, driving his 
horns in to the very hilt; free again, seizes hold 
with his mouth—thus biting and _ stabbing, 
until he kills or routs his foe. I am not able 
to say exactly how long the eggs are incubating, 
but, as nearly as I could observe them (in the 
Sumass and Chilukweyuk streams), in about 
eight weeks the young escape from the ege- 
house. The females were invariably driven away, 
with the same ferocity as other unwelcome 
guests, from the depositing the spawn to the 
exit of the infant fish: then old and young dis- 
appear into deeper water, and are seldom seen 
again. 
During the winter, I constantly obtained the 
bullheads from out the seine-nets used in Esqui- 
malt Harbour to procure fish for the supply of 
Victoria market. Rejected by the fishermen, 
the Indians greedily gathered up the despised 
fishes, broiled them over the lodge-fire empaled 
on a slender twig, then feasted right-royally on 
the grilled remains of the spiny martyrs. 
The genus Centridermichthys 1s characterised 
as follows :—Head more or less depressed, 
rounded anteriorly; head and body covered, 
