THE FISHES OF SAMOA. 381 



Family PERISTED1ID.£. 

 PERISTEDION Lacepede. 



1393. Peristedion engyceros Gunther. Deep seas of Hawaii. 



1394. Peristedion hians Gilbert & Cramer. Deep seas of Hawaii. 



1395. Peristedion liorhynchus Gunther. Admiralty Is. (Fish. Challenger, 1880, 46). 



Family CEPHAUCANTHID£. 



CEPHALACANTHUS Lacepede. 



1396. Cephalacanthus orientalis (Cuvier & Valenciennes). Hawaii; New Guinea; Waigiu; 



Tahiti (Seale); East Indies. 



Family G0BIID£. 



ANALYSIS OF GENERA OF GOBIID.E FOUND IN THE SOUTH S^AS. 

 [This table is quite tentative, many of the genera named being of uncertain boundaries and doubtful value.] 



A. Soft dorsal and anal free from the caudal: no pit above the opercle. 

 U. Spinous dorsal present: ventral fins well developed. 

 C. Ventral rays, i, 5. 

 D. Ventral fins more or less divided. 

 E. Eleotrin.e: Ventral fins wholly separate; pectorals normal; eyes normal. 

 F. Body scaly. 



G. Vomer with teeth; a caudal ocellus; scales small Bostrychtjs 



GG. Vomer without teeth. 

 II. Scales small (fewer than 50). 



/. Sides of head naked; one or more dorsal spines produced Valenciennea 



II. Sides of head scaly; none of the dorsal spines produced; head depressed. 



J. Preopercle with a small hook or antrorse spine at its angle Eleotris 



J.T. Preopercle unarmed Guavina 



SIT. Scales moderate or large (fewer than 50). 



K. Snout broad, fiat, depressed; sides of head scaly Ophiocara 



KK. Snout moderate. 



X. Top of head with bony crests: a black spot at base of pectoral Bitis 



LL. Top of head without crests. 

 M. Sides of head scaly; scales large. 



K. Sides of head with vertical series of small cirri; lower jaw heavy; body robust Gobiomorphus 



NN. Sides of head without cirri. 



0. Preopercle with 2 or 3 rather strong upturned spines; body robust Asterropterix 



00. Preopercle unarmed; body compressed, the form and habit similar to that of Fundulus; head 



pointed, depressed Hypseleotris 



MM. Sides of head naked; preopercle unarmed. 



P. Nuchal region entirely naked Eviota 



PP. Nuchal region fully scaled Trimma 



FF. Body entirely naked, slender, and elongate. 



Q. Dorsal fins separate, the second moderate Hetereleotris 



QQ. Dorsal fins connected, the second many-rayed; chin very prominent; tongue notched Vitreola 



EE. Periophthalmin.e: Ventral fins partly united at the fleshy base; pectoral with a scaly muscular base; eyes 

 more or less stalked; scales very small, cycloid; tongue short, rounded, adnate; isthmus broad. 

 JR. Dorsal rays x to xv-12; teeth not horizontal and not exserted. 



S. Scales minute (80 to 100, : Periophthalmus 



SS. Scales larger, about 55 Periophthalmodon 



DD. Gobiin.e: Ventral fins completely united; pectoral without scaly muscular base; eyes not erectile. 

 T. Ventral fins not adnate to the belly, in a short rounded disk; upper teeth not movable. 

 U. Body scaly. 

 V. Vomer without teeth. 

 II'. Teeth not all in one series in each jaw. 

 A'. Caudal fin not lanceolate nor greatly produced; teeth all simple, no barbels. 

 1". Cheeks and opercles each well scaled. 



Z. Scales small; pectoral with silky rays above Chlamydes 



ZZ. Scales large: tongue notched; pectoral without silky rays Gnatholepis 



IT. Cheeks naked; opercles scaly; scales of body large Vaimosa 



VVV. Cheeks and opercles naked. 



