76 PROCEEDINGS OP THE ACADEMY OF [1885. 



The Gobius pisonis of Gmelin and its synonym, Gobius amorea 

 of Walbaum, arc based on the Eleotris of Gronow. This is un- 

 doubtedly identical either with Eleotris gyrinus or Guavina gua- 

 vina. To us there is little doubt that the former species was the 

 one intended, as the phrase " P. D. prior declinata 6 radiata ; 

 secunda equalis, priori vicina " applies well to the Eleotris gyri- 

 nus and not at all to the Guavina guavina, in which species the 

 second dorsal is much larger than the first. We therefore adopt 

 the name Eleotris pisonis instead of Eleotris gyrinus. 



We have examined numerous specimens of this species from 

 the Rio Almendares, near Havana. All these possess the antrorse 

 preopercular spine supposed to distinguish the genus Culius from 

 Eleotris. In the larger ones it is partly hidden by the encroach- 

 ment of the skin and from this has arisen the erroneous suppo- 

 sition (of Giinther and others) that this species is one in which 

 the spine is wanting. 



A comparison of the figure and description of Eleotris picta, 

 given by Kner and Steindachner, shows no constant point of 

 difference whatever. We therefore regard picta as a synonym of 

 pisonis. 



The Culius perniger of Cope is evidently identical with pisonis, 

 Professor Cope being the first describer of the species who did 

 not overlook the preopercular spine. 



10. Eleotris aequidens. 



Eleotris sp., Bean, Proc. U. S. Nat. Mus., 1880, 83 (name only). 



Culius cequidens Jordan & Gilbert, Proc. IT. S. Nat. Mus., 1881, 461 

 (Mazatlan); Jordan & Gilbert, Proc. U. S. Nat. Mus., 1882, 372 

 (Colima); Jordan & Gilbert, Proc. U. S. Nat. Mus., 1882, 380 (Cape 

 San Lucas, San Jose); Jordan & Gilbert, Bull. U. S. Fish Com., 1882, 

 108 (Mazatlan). 



Habitat. — Streams about the Gulf of California, south to Colima. 



This species is known to us from the original description by 

 Jordan and Gilbert ; it is said to be abundant in the streams of 

 Sinaloa and Lower California. 



11. Eleotris belizana. 



Culius belizanus Sauvage, "Bull. Soc. Philom. Paris, 1879, 16 

 (reprint)" (Belize); Jordan & Gilbert, Proc. U. S. Nat. Mus., 1881, 

 462 (foot-note). 



Habitat. — Belize. 



