PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 327 



This species was described soon after byDr. Ayres in the Proceedings 

 of the California Academy of Sciences, 1854, p. 19, as Gila grandis. It 

 is apparently identical with the ])rior Ptj/chochiluH oreffonensis of Ilichard- 

 son. This species is now no longer called " Salmon Trout," its market 

 name being " Pike." 



The small-scaled Pti/cJwchilus (fvorax of Girard) was not then noticed 

 by Dr. Ayres. 

 5. Catostomus occidentalis Ayres (1. c). 



Soon after reconsidered bj' Dr. Ayres, in the Proceedings of the Cali- 

 fornia Academy, under tlie same name, and also still later by Professor 

 Agassiz (Am. Journal Sci. Arts, 1855), still as Catostomus occidentalis. 



San Francisco, Cal., 2Iarch 20, 1880. 



NOTE ON "SEMA" AND "DACENTRUS." 



By DAVID S. JOMOA]^. 



In the Bulletin of Hayden's United States Geological and Geograph- 

 ical Survey, vol. iv, Xo. 2, 1878, I iiublished " Notes on a collection of 

 fishes from the Eio Grande at Brownsv^ille, Tex.'* In this paper are 

 characterized two new species, " Sema signifer^^ (p. 399), and '■'■ Dacentrus 

 lucem''' (p. GOT). 



These species must be suppressed. The former is a foetal Embiotocoid, 

 apparently Vymatogaatcr aggrcgatus, the other is the young of Hystero- 

 carpus trasl'ii. 



The latter discovery was made before the paper was printed, but by 

 inadvertence it was sent to the jiress during my absence in the field. 



Of course neither of these species really came from the Rio Grande 

 at Brownsville, Tex., and their presence in a jar otherwise containing 

 only Texas fresh-water fishes is the only excuse for the gross blunders 

 as to their relationships. 



San Francisco, Cal., March 20, 1880. 



description of a ne^v scorp^noid fish (sebastichthits 

 proric;er), fro.1i montekev bay, cat^ifoknia. 



By DAVID S. JOKDAN and CHARLES H. CILBERT. 



Allied to *S'. ovalis and >S^. elongatus. having the mouth, spines, and fins 

 of the former and the color and general appearance of the latter. 



Body elongate, a little deeper than in S. elongatus and somewhat 

 more compressed, tapering slowly backward into a slender caudal pe- 

 duncle, which is rather shorter and stouter than in S. elongatus. 



Head rather short and small, the profile somewhat steeper than in S. 

 elongatus. Mouth small, much as in S. ovalis. the short, narrow maxil- 

 lary extending to below the middle of the eye, the premaxillary on the 



