84 ATHERINID^ : SILVERSIDES 



Range. — Basin of the Rio Papaloapam, eastern Mexico (known only from the type 

 locality). 



The specimens from El Hule, mentioned in the original description 

 of LISA, belong to a very different species, x\rchomenidia sallei. 



XXXVI. COLPICHTHYS Hiibbs, 1918. 



CoLPicHTHYS Hubbs, Proc. Acad. Nat. Sci. Phila. 67, 1917 (1918). 



Orthotype. — Atherinops regis Jenkins and Evermann. 

 Range. — Gulf of California. 



This group may be regarded as a subgenus of Atherinops. For the 

 present, however, we grant it separate standing. 



134. Colpichthys regis (Jenkins and Evermann), 1888. 



Atherinops regis Jenkins and Evermann, Proc. U. S. Nat. Mus., 11, 138, 1888; 

 ibid., 14, 137, 1891 ; Jordan and Evermann, Bull. U. S. Nat. M-us., 47, pt. 1, 

 807, 1896; Hubbs, Bull. Amcr. Mus. Nat. Hist,, 419, 1918. 

 Type-locality. — Guaymas, Sonora. 



Range. — Gulf of California ; thus far recorded only from Guaymas. 



XXXVII. ATHERINOPS Steindachner. 1875. 



Atherinops Steindachner, Ichth. Beit., 3, 61, 1875; Sitzb. Akad. Wiss. IVien. 72, 

 89, 1875; Jordan and Evermann, Bull. U. S. Nat. Mus., 47, pt. 1. 807, 1896; 

 Hubbs, Bull. Amer. Mus. Nat. Hist., 38, 409-440, 1918. 

 Orthotype. — Atherinopsis affinis Ayres. 

 Range. — Outer coast and adjacent islands of Lower California. California, and 

 Oregon. 



This genus in external characters bears a very strong resemblance 

 to Atherinopsis. The teeth, however, being Y-shaped or forked, are re- 

 markably different. 



135a. Atherinops affinis affinis (Ayres), 1860.'^'- 

 (Plate X, Fig. 38; Plate XII, Fig. 41) 

 Atherinopsis affinis Ayres, Proc. Cal. Acad. Nat. .Sci., 63, 1860. 



Atherinops affinis affinis Hubbs, Bull. Amer. Nat. Hist., 38, 420, 1918 (full 



synonymy). 

 Type-locality. — San Francisco, California. 

 Atherinops oregonia Jordan and Snyder, Proc. U. S. Nat. Mus., 45, 575, pi. 46, 1913. 



Type-locality. — Yachats River, Oregon. 

 Range. — Coast of Oregon and of California south to Monterey ; including mouths 

 of streams. South of Monterey A. a. affinis intergrades with A. a. lit- 

 toralis. 



It seems probable that examples of this species were among Girard's 

 original types of Atherinopsis californiensis. 



135b. Atherinops affinis littoralis Hubbs, 1918.-^'- 



Atherinops affinis Auctorum, in part. 



Atherinops affinis littoralis Hubbs, Bull. Amer. Mus. Nat. Hist., 38, 426, 1918. 

 Type-locality.— l^OTth Island, San Diego Bay, California. 



