1899.] NATURAL SCIENCES OP PHILADELPHIA. 345 



Ranrje. — West coast of North and South America, Japan, 

 soutlieru Europe. Occasioual in West Atlantic. 

 41. Sarda chilensis (Cuvier and Valenciennes). 



RIamys cMlensis Cuv. and Val., Hist. Nat. Pois., viii, 163, lS3l [Val- 

 paraiso] ; Steindachner, Iclitby. Notizen, vii, 25, 186S [Chile] ; 

 Kitahara, Jour. Fish. Bureau, Tokyo, vi, i, 3, pi. iv, lig. 10. 

 Sarda ehilensis Jordan and Gilbert, Proc. U. S. N. M., iii, 27, 1880. 



Local name, Chanchilla, Bonito. 



Two adult specimens, one young. 



Head 3^, depth 4f-5. D. XVII(XVIII)-I,13-VII(VIII). 

 A. II,11-VI (VII). Length 220, 400, 430 mm. 



The large specimens appear to be typical, though the color mark- 

 ings are somewhat obscure. We are inclined to recognize the speci- 

 fic identity of *S'. orientalis^^ as distinct from S. ehilensis, notwith- 

 standing the fact that Jordan and Evermann, following Dresslar 

 and Fesler (^M^/. U. S. F. C, vii, 1887, 441) place both in the 

 synonymy of Saixla ehilensis. 



In the specimens in hand the eye is 8 in head as against 9i in 

 orientalis (same length fish), and the posterior end of the maxil- 

 lary, instead of being irregular in outline and concave on its upper 

 border as in S. orientalis and S. sarda, is regular and almost round. 

 The single juvenile specimen shows the same peculiarities in color 

 markings as have been noted in the young of S. sarda, by Stein- 

 dachner {lehthy. Berichte, v, 8, 1868). There are no traces of 

 longitudinal striping, but the sides are barred two-thirds of the 

 way from pectoral to tail with ten or eleven dusky vertical stripes. 

 The posterior end of the maxillary is also weakly, but evidently 

 serrate. 



The discrepancies in color markings to be noticed in the pub- 

 lished figures of both *S'. sarda and S. ehilensis are doubtless due to 

 the fact that the specimens drawn have been in all stages of transi- 

 tion between the juvenile barred type and the adult form with nar- 

 row longitudinal stripes. 



ISTIOPHORID^. 

 42. Istiophorus audax (Pbilippi). 



Uistiophorus audax Philippi, Sohre los Tiburones, etc., de Chile, 35, 

 1887. 



Local name, Pez-arjiija, described by Philippi from specimens 

 from Iquique. 



'^ Temminck and Schlegel, Fauna Japouiea, 52. 



