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 9 or 10 plates. 



9. Cottus asper Richardson. 



Twenty-eight specimens, 2 to 5 inches in length, taken 

 July 26, in Lake Washington. A common species. 



