The Fresh \\'ater Fishes of the Island fo Formosa. 287 



Rctuarks: This species is very closely allied to CIkiiuki occUata^^ Iroin 

 China. It differs in having no teeth on palatines and a greater num- 

 ber of scales in a transverse series. 



Family GOBIID.^. 

 Artificial Key to the Formosan Genera. 



A. Ventral fins entirely separated; pectorals normal; eyes not erectile. 



a. Pre-opercle with a concealed, hook-like spine; scales moderate, ctenoid; 



dorsal spines low; interorbital space without ridge Eleotris. 



aa. Pre-opercle without spine; scales moderate, ctenoid; dorsal spine low; 

 interorbital space with prominent ridges Bulls. 



B. \'entrals joined at least at base. 



a. Ventrals adherent to the belly; body scaly; teeth of the upper jaw mov- 

 able, in a single series Sicyoplerus. 



aa. Ventrals not adherent to the belly; body scaly; teeth conical, fixed, those 



of the upper jaw in several series. 



b. Soft dorsal and anal short, each composed of nine to twelve soft rays. 



c. Tongue truncate or rounded or pointed at tip; gill-openings 



chiefly confined to the sides; pectorals without silk-like rays 



above; dorsal spines rather weak, some of them often elongate. 



Rhinogobiiis. 



cc. Tongue emarginate at tip; gill-openings extending forward 



below; pectorals without silk-like rays above; scales rather large, 



about fifty Glossogobius . 



bb. Soft dorsal and anal long, the former composed of fourteen to thirty 



rays, dorsal spines seven to nine. 



c. Scales moderate; soft dorsal composed of fourteen or fifteen rays; 



cheeks scaly at least above; pectorals without free silk- like rays 



above Acanthogobius . 



Genus Eleotris (Gronow) Schneider. 



1763. Eleotris Gronow, Zoophyl., p. 83 (non binomial). 



1801. Eleotris Schneider, Syst. Ichth., p. 65. (Type Gobius pisonis Gmelin). 



1874. Culius Bleeker, Archiv. Neerl., IX, p. 303 (Poecia fusca Schneider). 



Body long and low, compressed behind. Head long, low, Battened 

 above, without spines or crests, almost everywhere scaly. Mouth 

 large, oblique, lower jaw projecting. Lower pharyngeals rather broad, 

 the teeth small, bluntish. Pre-opercle with a small concealed spine 

 below, its tip hooked forward. Branchiostegals unarmed. Tongue 

 broad, rounded. Posttemporal bones very strongly divergent, their 

 insertions close together; top of skull somewhat elevated and declivous; 

 interorbital area slightly convex transversely; dorsal fins well apart, 



1' Channa ocellala Peters, Monatsb. Acad. Wiss. Berlin, 1864, p. 384. China. 



