56 ATHERINID^ : SILVERSIDES 



ly undulate, not crenate; radii and circuli obsolete on exposed field of 

 scales. 



Coloration of preserved specimens moderately dark, with a silvery 

 lateral band about as wide as a scale, and disappearing anteriorly. Tips 

 of vertical fins dark. 



XXII. HUBBESIA Jordan, 1919. 



HuBEESiA Jordan, Proc. U. S. Nat. Mus., 310, 1919. 



Orthotype. — Menidia gilberti Jordan and Bollman. 

 Range. — Tropical Pacific, in the Panama region. 



This well marked genus includes a single species, related most 

 closely to those of Menidia and Membras. Like Thyrinops of the 

 same region, its scales are sculptured by apical radii, but in that genus 

 the radii are much finer and more numerous. 



85. Hubbesia gilberti (Jordan and Bollman), 1889.-^*- 

 (Plate IV, Fig. 15) 

 Menidia gilberti Jordan and Bollman, Proc. U. S. Nat. Mus., 12, 155. 1889; Jordan 

 and Evefmann, Bull. U. S. Nat. Mus., 47, pt. 1, 798, 1896. 

 Kirtlandia gilberti Gilbert and Starks, Mem. Cal. Acad. Sci., 4, 58, 1904. 

 Hubbesia gilberti, Jordan, /. c, 55, 310, fig. 2. 

 Type-locality. — Panama. 

 Range. — Panama Bay. 



XXIII. MEMBRAS Bonaparte, 1837. 



Membras Bonaparte, Fauna Italica, 1837, fasc. 91, no pagination; Jordan and Ever- 

 mann, Bull. U. S. Nat. Mus., 47, pt. 1. 789, 1896 (Membras referred to 

 .A.THERINA) ; Jordan, Copcia, No. 32, 47, 1916 (Atherina mochon incorrectly 

 designated as type of genus). 



Orthotype. — Atherina martinica Cuvier and Valenciennes (by reference). 

 Kirtlandia Jordan and Evermann, Bull. U. S. Nat. Mus., 47, pt. 1, 794, 1896. 



Orthotype. — Chirostoma v.\grans Goode and Bean. 

 Range. — Tropical Atlantic shores of America, north to New York. 



The genus Membras was defined by Bonaparte, but without men- 

 tion of a type in connection with the description. In referring Membras 

 to Atherina, Jordan and Evermann overlooked the fact that farther 

 on in the same work Bonaparte explained that the two genera, Menidia 

 and Membras, were based on exotic species and that they corre- 

 sponded to two sections of Atherina, indicated but not named by 

 Valenciennes. Membras, therefore, rests on a species allied to our genus 

 Kirtlandia, which name it may be taken to replace. Our notes on the 

 type of Atherina martinica in Paris indicate that its fins are naked. 

 It is therefore possible that the genus Kirtlandia, characterized by its 

 scaly fins, may be distinct from Membras. These scales on the fins are 

 deciduous, however, and may have been present originally on the type 

 of A. martinica. 



