Laguna Marine Laboratorp 45 
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. 
Hontebnao ow @ alli Onmila sees oes ene 
Momence © alaormi ay ees ee ee j 65 
Macunas Beach, Calitormiat sss. a 3 27 
San Diego, California ...................... 35 
San Martin Is., Mexico _ .................. 
355 95 
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. 
