CJILBKUT AND STAKK8 — FISHES OF PANAMA IfAV 

 Measurements in Hundredths of Length without Caudal. 



ii: 



Species . 



Locality 



Lengtii witliiiiil laiiil.il ill mm iSO 



Head 



IVptli 



Hye 



i'lCdihital (least depth).... 



I nUTdihital (l)one) 



.Siuiiit 



.Maxillary 



Pectoral 



Third dorsal sjiine 



Second anal spine 



Ventral 



Caudal 



Caudal peduncle (height) 



48 



7 

 >4l 



S 



19 

 13 

 37 

 1 61 



7 

 22 

 26 



9 



HKACIIYSOMUS 



Panama 



TAURINUS 



La Pa/, r.ala|t;ij;os 

 L. C. i Islands 



216 



3'1 



421 



s 



III 



s 



'7J 



121 

 36 



'3 

 6.1 



22 



3' 

 9 



Family GERRID^E. 



210. Eucinostomus californiensis (Gill). 

 Diaptcrus doiuii GiLi-, 1863, p. 162. 



We found this species very common at Panamii, and carefully selected a 

 series of about twenty specimens, with a view to exhibiting all the variations to which 

 it is subject. AVe have also a large number of specimens from other localities. 



Our extensive series seems to prove E. doivii to be invalid. It is alleged to 

 differ from this species in having the maxillary groove "linear" instead of "broad 

 and semi-oval "; in having the scales o-47-lO instead of G-44~ 13, and in having the 

 " spinous dorsal blackish at the margin" rather than " fins immaculate." 



Our specimens show all intermediate stages of the maxillary groove, from 

 linear to broadly U-.sha]ied. In some individuals the groove is as wide at the anterior 

 or open end as at the middle, but in most of them it is more or less constricted ante- 

 riorly by the encroachment of the scales on each side. In one specimen the groove 

 is wholly closed in front by the meeting of these scales. The scale-formula in our 



