122 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 1186^. 



Name. 



* Argyreus osculus ' 



Argyreus notabilis 



Agosia chrysogaster 



Agosia metallica 



* Pogonichthys intequilobus, (B. & G.) 



* Pogonichthys synimetricus, (B. & G.) 



* Pognichthys argyreiosus, (B. & G.)"- 



* Pogonichthys communis 



* Gobio gelidns 



* Gobio £esti valis ^ 



Gobio vernalis 



* Leucosomus dissimilis * 



* Leucosomus pallidus 



* Leucosomus incrassatus 



* Nocomis uebracensis 



Esoglossum mirabile'' 



Meda fulgida** 



Cliolavigilax, (B. &G.)' 



Cliola velox 



* Cliola vivax 



* Alburnus dilectus * 



* Alburnus umbratilis ' 



t Alburnus amabilis"' 



Identification. 



Agosia oscula, (Grd.). 

 Agosia oscula, (Grd.). 

 Agosia chrysogaster, (Grd.). 

 Agosia metallica, (Grd.). 

 Pogonichthys macrolepidotus, (Ayres). 

 Algansea symmetrica, (Grd.). 

 Pogonichthys macrolepidotus, (Ayres). 

 Platygobio gracilis, (Rich.). 

 Hj bopsis gelidns, (Grd.). 

 Hybopsis aestivalis, (Grd.). 

 Hybopsis amblops, (Raf.). 

 Couesius dissimilis, (Grd.). 

 Semotilus atromaculatus, (Mitch.). 

 Semotilus atromaculatus, (Mitch.). 

 Hybopsis biguttatu.s, (Kirt.). 

 Phenacobius uurabilis, (Grd.). 

 Meda fulgida, (Grd.). 

 Cliola vigilax, (B. & G.). 

 Cliola vigilax, (B. &G.). 

 Cliola vigilax, (B. & G.). 

 Notropis dilectus, (Grd.). 

 Notropis umbratilis, (Grd.). 

 Notropis amabilis, (Grd.). 



'The type of Argyreus osculus has about 90 scales in the lateral line, aud is identical 

 with Apocope venfricosa. The type of A. notabilis I cannot find, but the figure seems 

 to be intended for A<josia oscula. 



-The type of Pogonichthtjs argyriosus is the young of F. macrolepidotus , with the cau- 

 dal lobe broken otf. The genus " Symmetrurus," based on this species, is therefore val- 

 ueless. 



" Ceraiichthys sterlctus, Cope, seems to be identical with Gohio aestivalis; the tyj)es 

 have been compared by me. 



* I now regard Couesius milneri, Jor., Ceratichthys prosthemius, Cope, aud Gohio plum- 

 beus as identical. Couesius dissimilis has the scales larger than in C. plumbeus ; lat. 1. 

 60; cross series 22, the lateral line much decurved ; the mouth oblique, subterminal, 

 much as in Semotilus ; head flattish above ; barbel small, terminal. Head 4 in length : 

 depth 4 ; eye 4| in head. 



s Exoglossum mirabile, Grd. = Sarcidium scopiferum. Cope = Phenacobius teretulus var. 

 liosternus, Nelson. 



'^ In the types of Meda fulgida, the teeth are 2, 4 or 5-5, 1 or 2. The genus is precisely 

 identical with Plagopterus, Cope. Meda fulgida and Meda argrntissima are, however, 

 apparently distinct species, although closely related. 



'' Cliola vigilax, B. and G. = Cliola velox, Grd. = Cliola vivax, Grd. := Hybopsis tudita- 

 nu8, Cope = Alburnops taurocephalus, Haj = Hypargyrus tuditanus, Forbes. 



* Alburnus dilectus, Grd. =: Alburnus oUgaspis, Cope. The types of the latter, exandned 

 by me, have 11 anal rays. 



■' Alburnus umbratilis, Grd. ^ Luxilus lucidus, Grd^ Notropi.i nigripinnis, Gilbert. The 

 typo of this species has 44 scales in the lateral line. Notropis macrolepidotus, Forbes, 

 much resembles the young of this species, but is said to have rather larger scales. 

 (6-40-3 instead of 9 or 10-44 or 45-4.) 



'0 Notropis amabilis seems to be a valid species. The following additions may be 

 made to the description as given in the Synopsis. Head less acute than in N. rubri- 

 frons. Jaws equal; maxillary reaching front of eye ; fiusshort; dusky blotch at base 

 of caudal very faint. Head 4J in length; depth 5. A. i. 8. Scales 5-34-3. 



