united by them as are otherwise entirely diiferent from one another. 

 Any one who should extend his examinations to a great number 

 of species would soon become aware of the fraitlessness of such at- 

 tempts, by Avhich neither a natiu-al arrangement is effected, nor the 

 determination of the species facilitated. A generic separation of 

 those species which are entirely devoid of scales, or which have the 

 teeth tricuspid or in a single series, appears to be the most justifiable. 



Synopsis of the Species. 

 I. The anterior dorsal with five or six spines. 

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



1. A longitudinal crest on the nape, p. 8. 



1. G. cyprinoides. 



2. No crest on the head. 



a. Caudal fin roimded, not elongate. 

 aa. Canine teeth none. 

 a. Head longer than high. 



aa. The second dorsal with eleven or more rays. 

 * Head longer than broad, p. 9. 



2. G. ratan. 7. G. niger. 11. G. flavus. 



3. G. syrman. 8. G. am-atus. 12. G. nudiceps. 



4. G. semilimaris. 9. G. lesueurii. 13. G. genivittatus. 



5. G. melanio. 10. G. jozo. 14. G. oligolepis. 

 G. G. sulcatus. 



** Head as broad as long, p. 14. 

 15. G. buccatus. 



45. Gobionellus hastatus, Girard in Proc. Acad. Nat. 8c. Philad. 1858, p. 169. 



• — Coast of Texas. 



46. Taiasica, Marcgr. p. 144.- — Gobius brasiliensis, Bl. Schn. p. 69 ; Cuv. Sf 



Val. xii. p. 121 (not Lickt.). — South America. 



Species oftohich the affinity is not determinable. 



47 Gobius rubro-taeniatus, Lienard, Bix. Bapp. Soc. Hist. Nat.Maur. p. 39. — 



Mauritius. 

 48. niger, Laccp. ii. p. 568. — Gobius commersonii, Cuv. ^ Val. xii. p. 136. 



- — He de France. 



49. Cicruleus, Lac6p. ii. p. 560 ; Cuv. ^- Val. xii. p. 137. — Bourbon. 



50. lyricus, Girard in Proc. Acad. Nat. Sc. Philad. 1858, p. 169. — Coast 



of Texas. 



51. wiirdemanni, Girard, ibid. — Coast of Texas. 



52. catulus, Girard, I. c. — Coast of Texas. 



63. gulosiis, Girard, I. c. — Coast of Texas. 



54. anjerensis, Bleek. Blenn. en Gob. p. 251. f. 11. — Anjer. 



65. cohitia, Pall. Zoogr. iii. p. 161 ; Nordm. inDemid. Voy. Buss. Mir id. 



iii. p. 435. — West coast of the Crimea. 

 56. gutum, Bitch. Ham. Fishes of the Ganges, p. 50; Cuv. ^- Val. xii. 



p. 138. — Ganges. — A figm-e of it (No. 272) exists in the Collection of 



Drawings of Fishes by Hardwicke (MSS. of the British Musemn). 



67. melanopus, ( Casteln.) Bleek. Singapore, iii. p. 456. — Singapore. 



58. patella, Thimb. in Vetensk. Acad. Nya Handl. Stockh. xiii. 1791, 



p. 191. tab. 6.^East Indies. 

 69. ■ breviceps, Blyth in Journ. As. Soc. Beng. p. 271. — Andaman Islands. 



