1885.] NATURAL SCIENCES OF PHILADELPHIA. 77 



This species is known to us only from a foot-note by Jordan 

 and Gilbert, referring to the description by M. Sauvage. It is 

 said to differ from E. sequidens, by having the teeth of the outer 

 row enlarged. 



5. EROTELIS. 



Ereotelis Poey, Memorias de Cuba, ii, 273, 1861 (valenciennesi = smaragdus") . 



This genus differs from the others in having the scales small, 

 cj^cloid, the body long, slender, and the tail lanceolate. In form 

 this genus differs strikingly from Eleotris, its nearest ally. It 

 presents a strong analogy to Gobionellus, differing from Eleotris 

 much as the latter does from Gobius. 



But one species seems to be known. 



Unlike the other Eleotridinse, this is strictly marine, inhabiting 

 the coarse algse on the coral reefs. 



Analysis of Species of Erotelis. 



a. Body long, slender; depth about ^ the length to base of 

 caudal; head broad, depressed; mouth large, very oblique, 

 the lower jaw projecting. Maxillary reaching to below centre 

 of eye, its length, 2^ in head. Vomer without teeth ; teeth 

 on jaws small, equal. Scales small, cycloid, about 100 in a 

 longitudinal series, largest on caudal peduncle. Caudal fin 

 lanceolate ; caudal peduncle slender, 3 in length of body. 

 D. VI- 1, 9; A. 1-9. Gill-openings extending forward to 

 below centre of opercle. Post-temporals diverging, inserted 

 near occipital crest, which is obsolete. Skull uneven and 

 rather thick. Preopercular spine absent. Vertebrae 10+15. 

 Pectorals reaching past middle of first dorsal. Dorsal and 

 anal high ; highest anal ray 1^ in head. Smaragdus. 12. 



12. Erotelis smaragdus. 



Eleotris smaragdus Cuvier & Valenciennes, xii, 231, 1837 (Cuba); 



Guichenot, "Poiss. in Ramon de la Sagra, Hist. Cuba, 130," 1855 ; 



Giinther, Cat. iii, 123, 1861 (Cuba); Jordan, Proc. U. S. Nat. Mus., 



1884, 141 (Key West). 

 Erotelis valenciennesi Poey, Mem. de Cuba, ii, 173, 1861 (Cuba); Poey, 



Syn. Pise. Cub., 396, 1868 (Cuba); Poey, Enum. Pise. Cub., 127, 



1875 (Cuba). 



