282 ACAITTHOPTERTGII. 



C. Amblyopina.* Vertical fins united, a single dorsal occupying the whole length of the back. 



10. Gohioides. Anterior teeth very strong : no cavity above the opercle. Scales, when present, 

 rudimentary. 4 



11. Trypaiichen. Several rows of teeth in each jaw, the outer the longer. No canines. A cavity above 

 the opercle. 



A. Gobiina. Ventrals forming a disk, being united along their whole extent or in their basal 



halves. Two separate dorsal fins. 



Genus, 1 — GoBnis,t Artedi. 

 BranoMostegals five : pseuddbranchim. Qill-openings of moderate widih. Body low and elongated. Ojpercles 



* Ambltopodipoemes, Bleeker, Is thus primarily divided — 



1. Ambh/opodini, B. T, body very elongate, no post-temporal fossa. 



2. TrypoMchini, B. iv, several rows of teeth in either jaw, the outer row the longer and very sharp, internal row of a 

 conical grain shape. A post-temporal fossa. 



t Although in my opinion minutely sub-dividing this large Genus will, not conduce to aiding the enquirer in determining 

 the species of a specimen, still I consider it necessary to give a synopsis of Bleeker's elaborate paper on the dentition of the GoBirai, 

 many of which fishes are included in Genus Gobius, Artedi. 



GoEiiNi : — Teeth in jaws simple, their apices being neither clubbed nor incised : in one or two rows in upper, in two or more 

 in lower, jaw. 



I. Brachygobii. No canines. 



1. Lc^hogobius, Gill. Body compressed. Teeth in both jaws in many villiform rows, the outer the longer. Scales 

 ctenoid. 



II. Platygobii. Teeth in many rows in both jaws. No true canines. 



2. CHlUcMhys, Coop.=ffiZlia, Gunther. Teeth villiform in both jaws. Scales small, cycloid. 



3. Qobiopsis, Steind. Teeth, the outer row the larger. Scales large, ctenoid. 



4. GkssogoUvs, Gm=Cepha,logobius, Bleeker. Outer row of teeth the longer, curved, not crowded together, unequal 

 Upper jaw not produced posteriorly. 



5. Flatygobius, Bleeker. Teeth, outer row in premaxillaries scarcely enlarged, in the lower jaw not enlarged. 

 lll^EugobU. Teeth in jaws fixed. 



a. Teeth in both jcms sharp, in, many rows, with the outer one enlarged : no canines. 



6. OoUus, Artedi=Pomatoschistus, Gill. Teeth in the outer row conical and snbequal : caudal obtuse. Scales ctenoid 

 Abdomen scaled. Snout short. 



7. Acamthogobius, GUI. teeth in the outer row subequal : caudal obtuse. Scales ctenoid. Snout conical. 



8. a-achygobvus, meekeT^Eypogymmgobius, Bleeker. Teeth in the outer row snbequal. Abdomen scaleless. 



9. JMcyctogob%us, Gill. Teeth in the outer row subequal. Scales cycloid, none on the head. 

 iO-Leindogobms,Gi\]~Clyclogobius,SteiDa. Teeth in the outer row subequal. Scales cycloid. Head scaled. 



11. Camgobms, Bleeker. Teeth in the outer row, slender, subequal. Caudal lanceolate. Head depressed, convex. 



12. btmogobms, Bleeker. Teeth in the outer row, conical, subequal. Caudal obtusely lanceolate, longer than the head. 



13. Actmogobius, Bleeker. Teeth in the outer row unequal. Caudal acute, shorter than the head. 



b. Teeth in each jaw in mamy rows, the ovier the longer : some truncated. 



14. Eenvigobius, Bleeker. Some of the middle teeth of the outer row in the premaxillaries truncated. 



c. Teeth in each jaw in mamy rows, pointed, subequal, the outer row erect cmd not elongated. No camines. 



15. Awaous, Val. Scales 50 to 60. 



16. Ehimogobius, Gill=Chonephorus, Eoey. . Scales 28. 



d. Teeth in either jam in many pointed rows, the outer the longer : in the lower jam laterally a posterior cwved canine. 



17. Ctenogrobi«s, Bleeker. Head scaleless. Scales 14 to 30 



18. Cemirojfoims, Bleeker=OpJopom«s, Steind. Tiist dorsal spine pungent. 



20 i",^&btT'BwSf iS'^T^'r- ^i^'^r- Head scaled. No pungent dorsal spine. Caudal lanceolate. 

 M. Amblygobius, B\eek.ei=Odontog6bmis, Bleeker. Scales 52 to 56. 



21. tryptocenWus, Ehr.=ParffoM«s, Bleeker. Scales 85 to more than 100. 



e. Teeth in both jaws pointed, and in two rows. 



22. Zonogobim, Bleeker. Outer row of teeth in upper and inner in lower jaw the lon-^er 



NSnes!""' ■■• - ^ ''"' "™ ^ '^'' J*^' *^' °"'«' ^°^ "^« l°°ger, placed wide apart and sub-horizontal. 



/. Teeth pointed, in one or less than two rows in the upper and many in the lower jaw. Canines present or absent. 

 '^'attt^'sShStocanrnt » ~ -«>« "PP- jaw = outer row in the lower jaw the longer, and posteriorly 



26: SSt^' BUeke^-^lLT^T °^*^* ^ '^^ prema^aries, few rows in lower jaw : no canines. 



MS^m^^^t!^^%^''''^- . ^^«* ^-i premaxillaries in one or less than two rows, the inner of 

 IV. CteTJo™ No S„e7YaS on i^^^^^^^^^ '^^ °"*" '"°^ '''' '°°S^^ = "° '^''°^«^- Caudal lanceolate. 



''• cu'rvlTsXtSh dTr'^i obnqudrin^^ ''"• ''"= °"*" ™" "^°" '°«^"^^^' '""^ ^^^est, and consisting of fixed, 



29. Pwrach<Bturichthys, Bleeker? Marrows rf^e?hTn '^? •°"e«'-v7°^eable, straight, and directed obliquely inwards. 

 straight, and fixed ones. ^ ™ ™ ^""^ J*^^' ^^ "^^^'^ ''°'^ <=lose together, consisting of elongated, 



V. GolionelU. Teeth in both jaws in many rows 



3?: toaL*rGir^iii-.irs^^^^^ °r ''^ '°"^^'- 



awmwrugum, roey. leeth small, the outer row setaceous and moveable. 



