106 GOBIIDJ., 



of the other species ; nevertheless they have been referred to thi-ee 

 different genera, which would comprise species hke E. ophiocephalus, 

 gyrinus, &c. I prefer, therefore, to arrange them according to their 

 natural affinities, without creating unnecessary denominations. 



Synopsis of the Species. 



A. Scales of moderate size, less than fifty in a longitudinal series. 



I. Snout short, broad, flat, depressed, the form of the head approaching 



that of Ophiocephalus : Eleotris (part.), Bleek. 



1. E. ophiocephalus. 4. E. aporos. 8. E. mogiunda. 



2. E. cantoris 5. E. hoedtii 9. E. maculata. 



(porocephalus). (tolsoni;. 10. E. giaudisquama. 



3. E. porocepualoides. 6. E. macrolepidota. 11. E. sima. 



7. E. madagascariensis. 



II. Suout of moderate length, the form of the head approaching that of 



Gobius (giuris). 



1. No black spot on the root of the pectoral : Eleotris (part.), Bleek. 

 12. E. gobioides. 13. E. obscura. 15. E. hasseltii. 



14. E. oxycephala. 



2. A black spot on the root of the pectoral : Butis, Bleek. 

 16. E. butis. 17. E. amboinensis. 19. E. caperala. 



18. E. melanostigma. 



III. Head and body rather compressed, similar in form to a Cyprinoid : 



Eleotris (part.), Bleek. 

 20. E. cyprinoides. 21. E. leuciscus. 23. E. cyanostigma. 



22. E. tsenionotoptera. 



B. Scales small, fifty and more in a longitudinal series. 



I. Less than twenty rays in the soft dorsal and anal fms. 

 1. None of the rays produced into a filament. 



a. No ocellated spot on the base of the caudal, 

 a. None of the bones of the head armed. 



aa. Vomerine teeth : Philypnus, Val. 

 24. E. dormitatrix. 25. E. lembus. 26. E. lateralis. 



bb. Palate entirely smooth : Eleotris (part.), Bleek. 



27. E. gyrinus. 30. E. gyrinoides. 32. E. guavina. 



28. E. smaragdus. 31. E. marmorata. 33. E. canina. 



29. E. fomasmi. 34. E. periophthalmus. 



/3. A spine at the angle of the praeoperculum : Culhis, Bleek. 

 35. E. fusca 36. E. melanosoma. 



(pseudacanthopoma). 



y. Some of the branchiostegals terminating in a spine anteriorly : 

 Belobranchus, Bleek. 

 37. E. belobrancha. 38. E. tronioptera. 



b. An ocellated spot on the base of the caudal fin. 

 a. Vomerine teeth : Bostrichthys, Gill. 



39. E. sinensis. 



