FISHES OF STREAMS TRIBUTARY TO MONTEREY BAY. 
59 
Pharyngeal teeth (cotype) 5-5, long and compressed; the tips hooked, the grinding surface well devel- 
oped, though narrow. Lips with a sharp-edged, homy covering (more conspicuous in larger individuals). 
Lateral line with a gentle downward curve in its anterior fourth. Dorsal inserted midway between 
pupil and base of caudal; height of longest (first) rays 1.3 in head; edge of fin nearly straight. Height 
of first anal rays 1.5 in head, the last ray half as high. Ventrals rounded; 1.5 in head; not reaching 
vent when depressed. Caudal deeply incised, the lobes rather pointed; about an eye’s diameter 
longer than head. Pectoral 1.3 in head, the edge rounded. 
Color dark above, lighter on sides, immaculate beneath; the dark color more intense on edges of 
scales and forming definite dark borders on those below lateral line. In life, olive on upper parts, silvery 
on tlie sides and beneath, the silvery color especially brilliant when reflecting the sunlight in the clear 
water. 
Fig. 1 . — Lavinia ardesiaca, new species. Type. 
Number of Dorsal and Anal Rays in Specimens of Lavinia ardesiaca and Lavinia 
EXILICAUDA. 
8 
49 
80 
31 
8 
13 
»4 
51 
38 
8 
25 
The specimens of L. exilicauda referred to in the above tables are from Cache Creek and Putah 
Creek, tributaries of the Sacramento. However, the number of dorsal and anal rays here given appears 
to be fairly characteristic of examples of the species from various parts of its range, as is shown in a 
table published by Rutter and here introduced. 
® Rutter, Cloudsley: The fishes of the Sacramento-San Joaquin basin, with a study of their distribution and variation. 
Bulletin Bureau of Fisheries, vol. xxvn, 1907, p. 127. 
