72, The Blennies: Blenniide 
Chirolophis (ascanii) of north Europe is remarkable for the 
tufted filaments on the head. These are still more developed in 
Bryostemma of the North Pacific, Bryostemma polyactocepha- 
lum and several other species being common from Puget Sound 
to Japan. Apodichthys (flavidus) of California is remarkable 
for a large quill-shaped anal spine and for the great variation 
in color, the hue being yellow, grass-green, or crimson, according 
to the color of the alge about it. There is no evidence, how- 
ever, that the individual fish can change its color, and these color 
forms seem to be distinct races within the species. Xererpes 
fucorum of California lies quiescent in the sea-weed (Fucus) after 
the tide recedes, its form, color, and substance seeming to corre- 
spond exactly with those of the stems of algae. Pholis gunnellus 
Fig. 625.—Gunnel, Pholis gunnellus (L.). Gloucester, Mass. 
is the common gunnel (gunwale), or butter-fish, of both shores 
of the North Atlantic, with numerous allies in the North Pacific. 
Of these, Enedrias nebulosus, the ginpo, or silver-tail, is especially 
common in Japan. Xiphidion and Xiphistes of the California 
coast, and Dictyosoma of Japan, among others, are remarkable 
for the great number of lateral lines, these extending crosswise 
Fic. 626.—Xiph’stes chirus Jordan & Gilbert. Amehitka I., Alaska. 
as well as lengthwise. Cebedichthys violaceus, a large blenny of 
California, has the posterior half of the dorsal made of soft rays. 
Opisthocentrus of Siberia and north Japan has the dorsal spines 
