108 



CALIFORNIA ACADEMY OF SCIENCES 



200. Anisotremus taeniatus Gill. 



Occasional in the market; of more frequent occurrence about the rocky 

 ishmds in the Bay. 



The species is undoubtedly distinct from its Atlantic representative A. vir- 

 ginicus, although some of the characters which have been relied upon to distinguish 

 the two are of no value. Thus, the gill-rakers are alike in both and the eye does 

 not differ in size. The second anal spine is variable in both; in trejiiatus, its tip 

 usually fails to reach the tip of the soft rays, in virgiaicas it usually reaches beyond 

 their tips. 



The most striking difference is in the color, as has been sufficiently described 

 by previous authors. In addition, we note that the fins in virginicus are more densely 

 scaled, this being especially well marked with the pectorals. The anterior portion of 

 the spinous dorsal differs widely in contour: in virginicus, the third spine is longest, 

 the second five-sixths or more than five-sixths the length of the fourth; in toiniatus, 

 the fourth spine is usually the longest, the second very short, not more than four- 

 sevenths the length of the fourth. Our material is not sufficient to enable us to deter- 

 mine the limits of variation in the relative lengths of the dorsal spines. The pectoral 

 seems to be slightly longer in tceniatus, and the preorbital a little narrower, but these 

 differences are unimportant. 



Measurements i?i Hundredths of Length ivithout Caudal. 



Species 



Locality 



Lentjth without caudal in iiini 



Head 



Depth 



Eye 



Snout 



Maxillary 



Interorbital 



-Second dorsal spine 



Tliiril ilorsal sjiiue 



Fourth dorsal spine 



Second anal spine 



Length of pectoral 



Length of ventral 



Llpi:)er lobe of caudal 



ANISOTREMUS 

 T^NIATUS 



Panama 



170 

 33 

 49 



8i- 

 12 



9 



9 

 10 



'51 

 i6i 

 16 

 36 



23 

 29 



193 

 33 

 48 



8 

 12 



91 



9 



91 

 16 



'7 

 16J, 



36 



22 



29 



ANISOTREMUS 

 VIRGINICUS 



Key West, 

 Fla. 



180 

 33 

 49 



8 

 12 



9i 



9 



I2i 

 16 



'5 

 '5i 

 34 

 23 J 

 28 



143 

 M\ 

 49 

 9 



I2i 



9i 

 9i 



i2i 

 17 



1 61 



36 

 24 

 29 



