1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



123 



Name. 



t Albumus megalops' 



* Alburnus socius- 



* Alburuops blennius ' 



Albumops fihumardi 



* Albuniopa illecebrosus * 



* Codonia oruata 



Cocloma vittata 



Plargyrus t yiMcns 



Plargyms bo wniani 



CyprJnella bubalina, (B. ife. G.) 



* Cypriuelia umbrosa •'■ 



* Cyprinella gnnnisoin'' 



t Cypriuelia beckwithi ' 



Identification. 



Notropis swaiui, (Jor. & Gilb.). 

 Notropis sociu8, (Grd.). 

 Notropis bleuniu.s, (Grd.). 

 Notropis sp. 



Notropis illecebrosus, (Grd.). 

 Notropis oruatus, (Grd.). 

 Notropis vittatus, (Grd.). 

 Notropis mega lops, (Raf.). 

 Notropis megalops, (Raf.). 

 Notropis bubaliuus, (B. & G. ). 

 Notropis bubaliuus, (B. & G.). 

 Notropis bubaliuus, (B. & G.). 

 Notropis bubaliuus, (B. & G.). 



' ^oti'opis swaini, Jordau & Gilbert, nom. sp. uov. := Alburnas megalops, Grd. The 

 name megalops is preoccupied iu the geuus Notro^ns; we therefore propose for this spe- 

 cies the new name jSfotroi}is swaini. The following description is taken from sjiecimens 

 obtained by Professor Gilbert and the writer in the Rio Comal at New Braunfels, Tex. 

 These have been compared with types of Albumus megalops and Albumus socius in the 

 Philadelphia Academy : 



Body moderately elongate, somewhat compressed, a little more robust than in N. 

 rubrifrons ; back a little elevated. Head rather short and broad, the interorbital 

 space somewhat convex, its width about two-thirds that of the eye. Eye very large, 

 2i in head, about half longer than the rather obtuse snout. Mouth large, oblique, the 

 lower jaw slightly projecting ; the maxillary reaching nearly to front of pupil ; its 

 length 2^ in head. Fins small ; dorsal inserted somewhat behind ventrals. Lateral 

 line decurved ; scales large, 16 before dorsal. 



Head 4^- in length ; depth 4^. D. 9. A. 9. Scales 6-35-3. Teeth 2, 4-4, 2, hooked 

 with little, if any, grinding sur-face. 



Color greeuish, the scales above dark edged; a plumbeous band along the sides, 

 which does not form a distinct spot at base of caudal ; dark dots along lateral line ; 

 a dark vertebral streak ; fins pale. 



This species is common in the outlet to the Comal Spring at New Braunfels. The 

 largest specimens taken are a little over 2 inches in length. Some of these are num- 

 bered 36529 in the U. S. National Museum. 



"A tyj)e of Albumus socius in the museum of the Academy belongs to a species 

 apparently different from N. sivaivi {megalops). N. socius is deeper, the depth being 

 4i in length ; the head is 4 iu body, the eye smaller, 3 iu head. The head is rather 

 deep and flattish above ; maxillary extending to past front of eye ; lower jaw longest. 

 A. 10. Lat. 1. 33. Color paler, the sides without dark dots. 



'In one of the types of Alburnops blennius the teeth are 1,4-4,0. The snout is 

 a little more couvex than iu A. illecebrosus. The anterior suborbital is in A. blennius 

 rather broad, but in A. illecebrosus very narrow. Both species are brightly silvery, 

 I am unable to identify A. shumardi, the types being lost. 



* Alburnops illecebrosus type. (Phila. Acad.) Head 4^; depth 4^. D. 8. A. 9. 

 Scales 6-36-3. Teeth 2, 4-4, 2, little hooked, with narrow griuding surface, and the 

 edges of the first very slightly crenate. Thirteen scales before dorsal. Eye 3f in head. 

 Snout rounded, 4i in head. Mouth oblique; upper lip on level of pupil. Maxillary 

 3f in head, reaching front of eye. Color pale, a very bright silvery band along sides, 

 about as wide as eye. (Meek.) 



■■^The types of Ctjprintlla umbrosa have 32 to 35 scales in the lateral line. They are 

 doubtless identical with the prior-named bubaliuus. 



•^The types of C. gunnisoni seem to be the young of A^. bubalinus. Lat. 1. 34. 



^ Cypriuelia beckwithi seems to be identical with C. timbrosa ; the differences noticeable 

 seem to be due to the small size of the specimen of C. beckwithi examined. Scales 

 7-34-4. (Meek.) 



