1 G 
ZOOLOGY. 
extending to a vertical line drawn posteriorly to the orbit; opercle and preopercle spinous. 
Origin of dorsal fin a little in advance of the base of the pectorals. Reddish brown above, 
lighter beneath. 
This is a much rarer Rock Fish than the preceding ones. 
List of specimens. 
Catalogue 
No. of 
Sex and 
Locality. 
When 
Collected by— 
Original 
Nature of spe- 
number. 
specimens. 
age. 
collected. 
number. 
cimens. 
487 
i 
Adult. 
San Francisco, Cal. ..._ 
1855 
Dr. Ayres.. 
3 
Alcoholic. 
V. FAMILY GASTEROSTEIDAE. 
20. G ASTE ROSTEUS PLEBEIUS, Grd. 
General Report upon Fishes. 
Body partly plated ; peduncle of tail not keeled. Dorsal spines three, of moderate develop¬ 
ment, and strongly serrated upon their edges ; insertion of anterior one taking place immedi¬ 
ately behind the base of the pectorals. Insertion of ventrals placed slightly in advance of the 
second dorsal spine ; ventral spine serrated on both edges, its extremity not reaching the tips 
of the ossa innominata. Posterior margin of caudal subcrescentic. 
“ Burnstickle” of the English ; “Sticklebacks” of the American people. 
List of specimens. 
Catalogue 
number. 
No. of 
specimens. 
Sex and 
age. 
Locality. 
When 
collected. 
Collected by— 
Original 
number. 
Nature of spe¬ 
cimens. 
331 
4 
Adult. 
San Francisco, Cal._ 
1855 
Dr. Newberry___ 
Alcoholic. 
21. GASTEROSTEUS SERRATUS, Ayres. 
General Report upon Fishes. 
Body entirely plated ; peduncle of tail keeled. Dorsal spines three ; high and slender ; con¬ 
spicuously serrated upon their edges ; anterior one inserted a little in advance of the base of the 
pectorals. Insertion of ventrals situated a little in advance of the second dorsal spine ; their 
own spine being serrated upon both edges, more conspicuously above than b.elow, and extending 
beyond the tips of the ossa innominata. Posterior margin of caudal concave. 
Another kind of “ Stickleback.” 
List of specimens. 
Catalogue 
number. 
No. of 
specimens. 
Sex and 
age'. 
Locality. 
When 
collected. 
Collected by— 
Original 
number. 
Nature of spe¬ 
cimens. 
334 
i 
Adult. 
Bay of San Francisco, Cal. 
1855 
Dr. Newberry_ 
Alcoholic. 
