laguna Racine ILa&oratorp 



rather thin walled, and little differentiated into stomach and intes- 

 tines. Other details may be seen from the figures. 



Food So far as observed the food consists principally of soft 

 Crustacea, (amphipods and isopods). The evidence would indicate 

 carnivorous habits, but not enough specimens were examined to 

 show whether they are exclusively so. 



A Study of GIBBONSIA 



Specimens examined: elegans. evides. 



Fort Bragg, California 3 



Monterey, California .. ...160 65 



Laguna Beach, California ...130 27 



San Diego, California .. . 61 3 



San Martin Is., Mexico 1 



355 95 



17 



Figure 17. Gibbonsia elegans 

 Diagrams to show variation in form and location of visceral organs. 



Measurements are as follows : 



Length : Tip snout to base caudal. 



Eye : Diameter. 



Snout to dorsal: Tip snout to base first spine. 



Eye to dorsal: Shortest distance between eye and first dorsal 

 spine. 



Head : Tip snout to inner edge of notch on upper, posterior part 

 of opercle. 



Scale counts : Three counts are used. One from anterior end of 

 lateral line, along the lateral line until it curves down, then in a 

 straight line to base of caudal; second from lateral line to base of 

 dorsal just above axil of pectoral where the lateral line arch is high- 

 est ; third above lateral line at the angle behind pectoral, the anterior 

 end of straight portion. 



