2192 BnUetin 47, United States National Museum. 



z. Occiput depressed, with a blunt median keel, 

 a'. Shoulder girdle without dermal flaps; dor- 

 8al spines 6; soft dorsal and anal short; 

 mouth verj' large ; isthmus broad ; ver- 

 tebras 14 + 16 {mirabilis). 



GiLLICHTHTS, 822. 



aa'. Shoulder girdle with 1 to 3 small dermal 

 flaps on the inner edge ; dorsal spines 

 5 ; soft dorsal and anal long. 



QUIETULA, 823. 

 zz. Occiput transversely rounded without median 

 keel. 

 6'. Shoulder girdle with 1 to 3 small dermal 

 flaps on its inner edge ; dorsal spines 5 ; 

 soft dorsal and anal long. Ilypnus, 824. 

 bh'. Shoulder girdle without dermal flaps ; dor- 

 sal spines 4 or 5 ; soft dorsal and anal 

 long. Clevelandia, 825. 



00. Body and head entirely naked. 



c'. Dorsal spines 4 ; body long and slender ; mouth large, 

 the lower jaw projecting; no barbels; soft dorsal 

 and anal long ; male with ornate colors. 



EVERMANNIA, 826. 



cc'. Dorsal spines 7 (rarely 6). 



d'. Chin without barbels; mouth small, little 



oblique; body robust, soft dorsal and anal 



short. GOBIOSOMA, 827. 



dd'. Chin with a fringe of short barbels; mouth 



terminal, oblique; soft dorsal and anal 



very short. Barbuufek, 828. 



Crystallogobiin^ : 



w?rt. Dorsal spines 2 (or 1) ; body wholly naked. 



e'. Eyes reduced to small rudiments; interorbital area forming a 

 sharp median range ; skull rather abruptly widened behind 

 orbits ; anterior portion of skull unusally long ; no flaps on 

 shoulder girdle; skull highest at nape, depressed above 

 the eyes ; soft dorsal and anal short. 



Ttphlogobius, 829. 



GOBIOIDIN.a:: 



jj. Dorsal fin continuous, the soft part and the anal joined to base of caudal; eyes 

 minute; body elongate ; scales minute or wanting; mouth very oblique, the 

 lower jaw projecting; gill openings moderate. 

 /'. Dorsal rays VI, 16 to 23; anal rays 17 to 23. 



g'. Teeth small, in a single series; scales present. Tyntlastes, 830. 



gg'. Teeth in a band, those of the outer series being very strong; scales 



present. 



h'. Body entirely scaled. Gobioides, 831. 



hh'. Anterior part of body naked. Cayennia, 832. 



8oo. lOGLOSSUS, Bean. 



loglossus, Bean, in Jordan & Gilbert, Proc. U. S. Nat. Mus. 1882, 297 (callhirus). 



Body elongate, strongly compressed, of equal depth throughout, cov- 

 ered with very small, mostly cycloid, scales. Head short, compressed, not 

 keeled above; mouth large, oblique, the lower jaw projecting; teeth in 

 narrow bands or single series, some of them canine ; no teeth on vomer or 

 palatines ; tongue very slender, sharp ; opercles unarmed. Gill openings 



