2190 Bulletin ^7, United States National Museum. 



ii. Preopercle without spine ; caudal without many acces- 

 sory rays at base; post- temporal bones sbort, 

 strongly divergent, the distance between their 

 insertions about equal to the narrow interorbital 

 space, or abont \ length of head; top of head with 

 a strong median keel, which is highest on the occi- 

 pital region ; no supraoccipital crest ; mouth very 

 oblique ; the teeth small. EROTELIS, 806. 



ee. Body naked on the anterior part ; head naked : lower jaw with 4 larger 

 recurved teeth. GYMXELEOTRIS, 807. 



eee. Body entirely naked. CHRIOLEPIS, 808. 



oo. Ventral fins united. 



j. Dorsal fins separate, free from caudal. 



k. Ventral disk short, adnate to belly; body subcylindrical, covered with 

 ctenoid scales; lips very thick ; upper teeth mostly small and movable, 

 lower fixed ; dorsal spines 6. 



I. Teeth simple; no canines in front of lower jaw. SICYDICM, 809. 



II. Teeth trifid (or bifid) ; no canines in front of lower jaw. 



COTYLOPUS, 810. 

 GOBIIN.E : 

 kk. Ventral disk free from the belly. 



m. Dorsal spines 4 to 8 ; eyes well developed. 



n. Teeth emarginate, uniserial, those of the lower jaw nearly hori- 

 zontal; dorsal spines 6; scales large, ctenoid; gill openings 

 moderate. EVORTHODUS, 811. 



nn. Teeth simple. 



o. Body scaly, more or less. 



p. Maxillary normal, not prolonged behind the rictus; 

 skrill of the usual gobioid form, comparatively 

 short and abruptly broadened behind the orbits ; 

 occiput depressed; supraoccipital and temporal 

 ridges continuous. 

 g. Dorsal spines 6; scales evidently ctenoid; head 



naked (the nape scaly as usual.) 



r. Interorbital area anteriorly elevated, with a 



large foramen-like depression in front of 



eye; body short, compressed, formed 



much as in Dormitator , nape with a 



fleshy crest; scales large. Vertebra 



11 + 15. LOPHOGOBIUS, 812. 



rr. Interorbital area not elevated in front; body 



more elongate; no fleshy nuchal crest; 



isthmus broad. 



s. Inner edge of shoulder girdle without 

 fleshy cirri or papillae; cranium 

 anteriorly short; interorbital space 

 narrower, grooved, with a low 

 median ridge or none ; median crest 

 on cranium low. 



t. Body scaly anteriorly and poste- 

 riorly (sometimes a naked strip 

 on back or belly). Vertebras 

 12 + 16 to 10 -f 15. GOBIUS, 813. 

 it. Body entirely naked anteriorly, 

 the posterior half scaled; scales 

 moderate or small. 



GARMANNIA, 814. 



