590 Labyrinthici and Holconoti 
is handsomest of all, rose-red with a black lateral spot. Cyma- 
togaster aggregatus, the surf-shiner, is a little fish, excessively 
common along the California coast, and from its abund2znce 
it has been selected by Dr. Eigenmann as the basis of his studies 
Fig. 481.—Viviparous Perch (male), Hysterocarpus traski Gibbons. Battle Creek, 
Sacramento River. (Photograph by Cloudsley Rutter.) 
of these fishes. In this species the male shows golden and 
black markings, which are wanting in the silvery female, and 
the anterior rays of the anal are thickened or otherwise modified. 
No fossil embiotocoids are recorded. 
