GILBURT AND STAKKS — FISHES OF PANAMA llAV 



45 



From .-1. comprcssa it ciiRers in the relative length of the head and maxillary. In .-/. niunde- 

 ola tile maxillary is contained in the head \\ times (i.igto 1.37); in comprcssa i J times (1.30 to 

 i.Si). In mundeola the head is contained 4.15 times in the length; in comprcssa 4.44 times. 



Since tlio piiljlication of tlie above description, as cited, the raateriul lias 

 been fnrtiier stiuliod l»y C'hloo Lesley Starks, wiiose resnlts we are i)crinitted to 

 incorporate below. 



Twenty-seven specimens were measured, ranging in size from 72 to 120 mm. in kngth. In 

 A. panamcusisXhe head measures .21 to .25 of the length exclusive of the caudal; in A. mundeola .24 

 to .26. The depth of panamcnsis is .24 to .26; of mitudcola .24 to .27. The size of the eye is the 

 most strikinn liifference between the two species, holding well from .05^2 to .o6;J in panamcnsis and 

 from .07 to .o~\ \\\ mundeola. The maxillary measures about the same throughout (doubtless 

 some tips are broken). \\\ panamcnsis the snout measures about .04 and in mundeola from .04 to 

 .05. Gill-rakers and also the rays in the dorsal and anal tins numi)er about the .same in the two species. 

 The length of anal l>ase in panamcnsis seems generally longer, running from .35 to .39 of length, 

 while in mundeola it runs from .33 to .36. The number of scales varies from 39 to 41 \n panamcnsis; 

 from 36 to 39 in mundeola. 



The extremes of the two species difTer j:;reatly in appearance, and no difficulty 

 is encountered in separating them; but a few specimens seem to come so nearly inter- 

 mediate that it is difficult to know to which form to a.ssign them. When collected 

 the two species were easily sei)arable on account of the faint, silvery, lateral stripe of 

 mundeola, but since preservation it has so faded in both species that it cannot be 

 considered. 



These two species may prove to be the same, but since A. mundeola has been 

 described, it will be better to consider the two as distinct, until enough material can 

 be obtained to settle the point beyond question. 



Measuremen/s in Hundredths of Length to Base of Caudal. 



Anchovia panamensis. 



77 

 89 

 92 

 86 



71 

 88 



89 

 109 



105 

 79 



24 

 23 

 22 

 21 

 23 

 23 

 23 

 24 

 24 

 25 



25i 



25 



26 



24 

 24 

 25 

 24 

 26 

 26 

 26 



6 

 6i 



51 



6 



6 



6| 

 6| 

 6f 

 6| 



18 



18^ 



19 



i7i 

 18 



>7i 



17 



19 



i8| 

 20 



(') 



October 12, 1903. 



