NATURAL SCIENCES OF PHILADELPHIA. 105 



Haploidonotus lineatus Gill. 



Amblodon lineatus Agassiz, American Journal of Science and Art, ser. ii. 

 vol. xvii. p. 307. 

 Haploidonotus neglectus Gill. 



Amblodon neglectus Girard, United States and Mexican Boundary Sur- 

 vey. Ichthyology, p. 12, pi. v. figs 6-10. 

 Haploidonotus Richardsonii Gill. 



Corvina Richardsonii Cuv. et Val., Hist. Nat. des Poissons, vol. v. p. 100. 

 The last species will be found to be the representative of a distinct genus, 

 but with our present knowledge, it is unadvisable to characterize it. Cuvier 

 and Valenciennes, in the Histoire Naturelle des Poissons, as well as Richard- 

 son in the Fauna Boreali-Americana, have attributed to it seven branchiostegal 

 rays. In the article "Ichthyology," of the last edition of the Encyclopaedia 

 Britannica, (p. 284,) Sir John Richardson has remarked of the species as fol- 

 lows : " We have, however, some suspicion of its belonging more properly to 

 the Theraponidse than to the Sciaenidse, notwithstanding Cuvier's weighty 

 authority. It has only six branchiostegals." The former description is pro- 

 bably correct. The species certainly is not allied to the Theraponida?. It dif- 

 fers principally from the true Haploidonoti by the form of its head, and of the 

 caudal fin. 



The Amblodon saturnus of Girard belongs to the subfamily of Sciaeninze, and 

 to the genus Rhinoscion Gill. 



Of the marine genus, there are two species. 



Genus Pogonias Lac. 

 Pogonias fasciatus Lac. 

 Pogonias chromis Cuv. 



On the Genus ANISOTREMUS Gill. 



BY THEODORE GILL. 



In the "Catalogue of the Fishes of the Eastern Coast of North America," 

 the Pristipoma rodo of Cuvier, which is a doubtful or accidental visitor to the 

 southern coast of the United States, has been taken as the type of a distinct 

 genus on which the name of Anisotremus has been conferred. The characters 

 of the genus are now given, with descriptions of the type and a newly dis- 

 covered species from the western coast of Central America. 



Anisotremus Gill. 



Anisotremus Gill, Catalogue of the Fishes of the Eastern Coast of North 



America, p. 32. 

 Sparus sp. Linn, et al. 

 Perca sp. Block. 

 Grammistes sp. Block, Schneid. 

 Lutjanus sp. Lactphde. 

 Pristipoma sp. Cuv., auct. 



Body rhombo-ovate and much compressed, highest at the anterior part of 

 the first dorsal fin, and thence declining toward the end of the second, gradu- 

 ally under the first, more rapidly under the second. Ante-dorsal region very 

 convex, and profile thence declining very rapidly to the snout. 



Head laterally of a rhomboid form, higher than long, with the profile very 

 oblique and nearly parallel with the obliquely descending border of the oper- 

 culum. Preoperculum behind nearly vertical' and finely serrated. Two pores 

 in front of the lower jaw, and a central groove behind." 

 1861.] 



