86 ATHERINID.^: SILVERSIDES 



Atherinichthys californiensis GiJnther, Catalogue Fishes Brit. Mits., 3, 



406, 1861. 

 Chirostoma californiense Jordan and Gilbert. Proc. U. S. Nat. Mus., 3, 29. 

 1880. 

 Atherina STORERi Ayres, in Girard, Proc. Acad. Nat. Sci. Phila., 136, 1856 (nom. 

 nud.). 

 Type-locality. — San Francisco. 

 Range. — Coasts and adjacent islands of western North America, from San Fran- 

 cisco south to Ballenas Bay, Lower California, and (according to Halkett) 

 north to British Columbia. 



The original description of this species is very brief and perhaps 

 included specimens of Atherinops affinis. 



XXXIX. BASILICHTHYS Girard, 1854. 



Basilichthys Girard, Proc. Acad. Nat. Sci. Phila., 7, 198, 1854; Thompson, Proc. 

 U. S. Nat. Mus., 50, 464. 1916 (not Basilichthys of authors in general, 

 which is the group here termed Austromenidia). 

 Orthotype. — Atherina microlepidota Jenyns. 

 Protistius Cope, Proc. Acad. Nat. Sci. Phila., 60, 1874; Fowler, ibid., 40, 737, 1904. 



Haplotype. — Protistius semotilus Cope. 

 Gastropterus Cope, Proc. Amer. Phil. Soc, 17, 700, 1878 (name earlier used as 

 Gastropteron, Gasteropteron, and Gasteroptera). 

 Gasteropterus Fowler, Proc. Acad. Nat. Sci. Phila., 40, 738, 1904. 

 Haplotype. — Gastropterus arch.«us Cope. 

 PisciREGiA Abbott, Proc. Acad. Nat. Sci. Phila., 342. 1899; Jordan, The Genera of 

 Fishes (Stanford University), 151, 1917. 

 Haplotype. — Pisciregia beardsleei Abbott. 

 Range. — Peru and Chile, in fresh and perhaps in salt water. 

 The South American atherinids with non-protractile premaxillaries 

 are sufficiently differentiated from Atherinopsis of North America to 

 warrant their generic separation. The characters of the genera in 

 question are outhned in the key. 



139. Basilichthys microlepidotus (Jenyns), 1842.-^'- 



Atherina microlepidota Jenyns, Zool. Beagle, 4, (Fish), 78, pi. 16, fig. 1, 1842; 



Guichenot, in Gay, Hist. Chile, Zool, 2, 253, 1848 ; Kner, Reise Novara, Fische, 



222, 1865. 

 Basilichthys microlepidotus Girard, Proc. Acad. Nat. Sci. Phila., 7, 198. 1854; 



U. S. Nav. Astron. Exp., 238, 1855. 

 Atherinopsis microlepidotus Thompson, Proc. U. S. Nat. Mus., 50, 463, 1916. 



Type-locality. — Valparaiso, Chile. 

 Range. — Streams and probably shores of Chile. 



A reexamination of Girard's figure and description of Basilichthys 

 MICROLEPIDOTUS indicates conclusively that he was deahng with a species 

 of the present genus, rather than with a species of Austromenidia, 

 as formerly presumed by both Thompson and Hubbs. Although the 

 premaxillaries are definitely stated to be protractile in Girard's descrip- 

 tion, his figure indicates the reverse. Among the diagnostic features of 

 the present species the heavy projecting upper jaw, narrow suborbital, 

 small first dorsal but high second dorsal and anal fins, the narrow, dull, 



