854 CALIFORNIA ACADEMY OF SCIENCES. 
8. Gasterosteus microcephalus Girard. 
One adult 58 mm. in length, and three young 34 mm. 
in length, were taken in Green Lake. The adult had 7 
well developed plates, the young had but 5. It was of 
interest to note that these specimens seemed to indicate 
that the young have the plates well developed first on the 
sides below and between the dorsal spines, and that the 
dorsal portions of the plates were the first to develop. The 
young were much lighter in color than the adult. Eleven 
specimens, apparently all adults, were taken in Lake 
Union. These were apparently similar to those from 
Green Lake, except they had 9g or to plates. 
g. Cottus asper Richardson. 
Twenty-eight specimens, 2 to 5 inches in length, taken 
July 26, in Lake Washington. A common species. 
