Labyrinthici and Holconoti e7% 
species, for which reason almost every species has been prop- 
erly made the type of a distinct genus. The two species 
found in Japan are Ditrema temmincki and Neoditrema ran- 
sonnett. In the latter species the female is always toothless. 
Close to Ditrema is the blue surf-fish of California, Embzotoca 
jacksoni, the first discovered and perhaps the commonest 
species. Tentotoca lateralis is remarkable for its bright colora- 
tion, greenish, with orange stripes. Hypsurus caryz, still brighter 
in color, orange, green and black, has the abdominal region 
very long. Phanerodon furcatus and P. atripes are dull silvery 
in color, as in Damalichthys argyrosomus, the white surf-fish, 
which ranges northward to Vancouver Island, and is remark- 
able for the extraordinary size of its lower pharyngeals. Hol- 
conotus rhodoterus is a large, rosy species, and Amplustichus 
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Fie. 311.—Silver Surf-fish (viviparous), Hypocritichthys analis (Agassiz). 
Monterey. 
argenteus a large species with dull yellowish cross-bands. 
Rhachochilus toxotes is the largest species in the family and the 
one most valued as food. It is notable for its thick, droop- 
ing, ragged lips. Hyperprosopon arcuatus, the wall-eye surf- 
fish, is brilliantly silvery, with very large eyes. H. agasstze 
closely resembles it, as does also the dwarf species, Hypocritich- 
thys analis, to which the Japanese Neoditrema ransonneti is 
very nearly related. The other species are all small. Abcona 
minima and A. aurora feed on seaweed. Brachyistius frenatus 
is the smallest of all, orange-red in color, while its relative, 
