68 ATHERINID^: SILVERSIDES 



? Atherinichthys regia laticlavia Smitt, Bill. Sven. Vet.-Akad., 24, pt. 4, No. 5, 

 32, pi. 4, fig. 30, 1898 (not Atherina laticlavia Cuvier and Valenciennes). 



? Atherinichthys regia microlepidota Smitt, /. c, 32, pi. 4, fig. 31, 1898 (not 



Atherina microlepidota Jenyns). 

 Menidia patagoniensis Eigenmann, Repts. Princeton Univ. Exp. Patagonia, 3, 



280, 1909 (the footnote refers to this species, not to hatcheri). 

 Type-locality. — "Probably at Sandy Point (Punta Arenas), Straits of Magellan." 

 Range. — Falkland Islands ; Straits of Magellan, southern Chile. 



This species has finer scales than any other of the genus. Its range 

 is the most southern of any American atherine. 



The two forms described by Smitt under the unavailable names 

 LATICLAVIA and MICROLEPIDOTA may prove worthy of subspecific or 

 even specific separation, in which case they will receive new names. 

 These forms may have been based on intergrades between nigricans and 



LATICLAVIA. 



XXXII. CHIROSTOMA Swainson, 1839. 



Chirostoma Swainson, Nat. Hist. Class. Anim., 2, 243, 1839; Jordan and Evermann, 

 Bull. U. S. Nat. Mus., 47, pt. 1, 792, 1896; Jordan and Snyder, Bull. U. S. 

 Fish Coinm., 19, 133. 1899 (1900); Meek, Publ. Field Mus. (ZooL), 3, 108. 

 1902; 5, 166, 1904; Regan, Biol. Ccntr.-Amer., Pisces, 57. 1907 (in part); 

 Eigenmann, Repts. Princeton Univ. Exp. Patagonia, 3, 280, 1909. 

 Haplotype. — Atherina humboldtiana Cuvier and Valenciennes. 

 Atherinoides Bleeker, Vcrh. Batav. Gen. Japan, 25, 40, 1853. 



Orthotype. — Atherina vomerina Cuvier and Valenciennes (= humboldtiana). 

 Atherinichthys Bleeker, /. c, 40 (not Atherinichthys of most subsequent 

 authors). 

 Orthotype. — Atherina humboldtiana Cuvier and Valenciennes. 

 Heterognathus Girard, Proc. Acad. Nat. Sci. Phila., 198, 1854. 



Logotype. — Atherina humboldtiana Cuvier and Valenciennes. 

 Lethostole Jordan and Evermann. Bull. U. S. Nat. Mus., 47, pt. 1, 792, 1896; 

 pt. 3, 2839, 1898; Jordan and Snyder, Bull. U. S. Fish Comm., 19, 133, 1899 

 (1900) ; Meek, Publ. Field Mus. (ZooL), 3, 108, 1902. 

 Orthotype. — Chirostoma estor Jordan. 

 Eslopsarum Jordan and Evermann, Rept. U. S. Fish Comm., 330, 1895 (1896) ; 

 Jordan and Snyder, Bull. U. S. Fish Comm., 19, 133, 1899 (1900); Jordan 

 and Evermann, Bull. U. S. Nat. Mus., 47, pt. 3, 2840, 1898; Meek, Publ. Field 

 Mus. (ZooL). 3, 108, 1902. 

 Orthotype. — Chirostoma jordani Woolman. 

 Range. — Lerma River stream system of central Mexico, including the lakes and 

 streams of the Rio Grande de Santiago, Rio Lerma Basin, the lakes and 

 canals of the Valley of Mexico, and the Rio Mezquital Basin. 



This genus is confined to the lakes and streams of the Lerma River 

 system of Mexico, and of the valley of the City of Mexico. It includes 

 all of the atherine fishes known from that district. Each one of the 

 species described from variously remote localities under the name of 



