108 



CALIFOKNIA ACADEMY OF SCIENCES 



200. Anisotremus taeniatus Gill. 



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

 islands in the Bay. 



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

 giniciis, 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 t'enlatus, its tip 

 usuallj'^ fails to reach the tip of the soft rays, in virgiaicus 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 tamiatus, 

 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 tcenialus, and the preorbital a little narrower, but these 

 differences are unimportant. 



Measurements in Hundredths of Letigth without Caudal. 



Species . 



Locality 



ANISOTREMUS 

 T^NIATUS 



Len<,rth without caudal in mm. 



Head 



Depth 



Eye 



.Snout 



Maxillary 



Interorbital 



.Second dorsal spine 



Thinl dorsal spine 



Fourth dorsal .spine 



Second anal spine 



Lenjfth of pectoral 



Length of ventral 



Upi^er lobe of caudal 



Panama 



170 

 33 



49 



193 

 33 



48 



ANISOTREMUS 

 VIRGINICUS 



Key West, 

 Fla. 



180 

 33 

 49 



9i 



9 



12^ 

 16 

 15 

 '5J 

 34 



23s 



28 



143 

 34i 

 49 

 9 



12I 



91 

 91 



12I 



17 

 1 61 

 1 6.1 

 36 

 24 

 29 



