74 PROCEEDINGS OF THE ACADEMY OF [1885. 



This species is abundant in the streams of Cuba. The num- 

 erous specimens examined by us were obtained by Prof. Jordan 

 in the Rio Almendares, near Havana. In life this species may 

 be readily distinguished from Eleotris pisonis, which abounds in 

 the same waters, by the bright cherry -colored edgings to its 

 ventrals and anal. 



4. ELEOTRIS. 



Eleotris "Gronow, Mus. Iehthyol., 16," 1757 (Non-binominal). 



Eleotris Bloch & Schneider, Syst. Ichtli., 65, 1801 {pisonis). 



Eleotris Cuvier & Valenciennes, xii, 216, pi. 356, 1837 (gyrinus). 



Culius Bleeker, Esquisse d'un Syst. Nat. des Gobioides, 303, 1874 (fuscus). 



As Eleotris pisonis possesses the preopercular spine assumed 

 to characterize the genus Culius, we place the latter name in its 

 synonymy. In large specimens of Eleotris pisonis, this spine is 

 somewhat concealed by the flesh, but it may always be found by 

 dissection. The four following species resemble each other very 

 closely, and probably agree in the structure of the skeleton, but 

 in this regard we have been able to examine only Eleotris pisoyiis. 



Analysis of Species of Eleotris. 



a. Body comparatively robust ; head broad, depressed ; body 

 compressed; mouth oblique, lower jaw little projecting; 

 maxillary reaching to below eye ; scales ctenoid, 46 to 61 

 in longitudinal series. Dorsal rays, VI— I, 8 ; anal rays, I, 

 7 or 8. Vomer without teeth. Gill-openings extending 

 forward below to angle of preopercle ; isthmus broad. 

 Preopercle with a spine projecting downward and forward 

 at its angle. Post-temporals slender, widely diverging, 

 inserted very near the scarcely evident occipital crest. 

 Skull highest in the middle, very broad and short ; bony 

 projections in front of and behind eye prominent. Verte- 

 brae about 10 + 14 (pisonis). Lower pharyngeals subtri- 

 angular, rather broad, with comparatively coarse teeth. 

 b. Scales large, about 48 in longitudinal series ; depth 4.) in 

 length to base of caudal ; head 3£. D. VI, 9 ; A. 1,8; 

 teeth rather small, those of the inner series in each jaw 

 largest. Amblyopsis. 8. 



