NATURAL SCIENCES OF PHILADELPHIA. 515 



instituted by Dr. Gray among the terrestrial pulmoniferous mollusks, appear 

 to have also less right to rank as such. On some future occasion it is proposed 

 to discuss more fully the meaning and limits of families among the fishes. It 

 may perhaps not be uninstructive to here exhibit the views, regarding the pre- 

 sent forms, of a naturalist who has been for many years investigating with a 

 prodigious activity the whole class, who has described nearly an eighth of all 

 the known species, inclusive of both recent and fossil ones, and who, by the 

 admirable precision and clearness of his descriptions, surpasses aDy of his 

 predecessors. 



Dr. Bleeker has distributed members of the seven groups, above elevated to 

 family rank, among five of his orders and seven different families. The most 

 patent mode to show the wide differences of his views from those of Giinther, 

 will be to arrange them in the regular serial order adopted by himself. Two 

 other groups are introduced which contain the remaining Trachinidae of Gun- 

 ther. They are the Percoid subfamily of Mesopriontiformes, with the genus 

 Latilus and the family of Uranoscopoidei. 



Caterva 1. Katapieseocephali. 

 Ordo 24. Percae. 



Subordo 4. Percichthyini. 

 Sectio 1. Paristemipteri. 

 Tribus 2. Percichthyini. 



Familia 76, (14.) Percoidei. 

 Subfamilia 6. Mesopriontiformes. 



Gen. Latilus, Cuv. (&c.) 

 Subfamilia 8. Trichodontiformes. 

 Gen. Trichoodon Steller. 



Sectio 2. Areiognathi. 



Familia 84, (22.) Sciasnoidei, = Sciasnini, Bon. 

 Subfamilia 2. Sillaginiformes. 



Gen. Sillago, Cuv. Sillaginichthts, Blkr. Aspro, Cuv. 

 Subfamilia 3. Sciaeniformes. 



Gen. Elegjncs. Cuv. All others are true Sciaenoids, except 

 Conodoti, which is a Pristipomatoid. 



Ordo 26. Scombri. 



Tribus 1. Sphyraenichthyini. 



Familia 93, (1.) Sphyraenoidei, = Sphyrasnidae, Bon. 



Gen. Sphyraena, Art. Paralepis, Risso. Pekcophis, Cuv. (fort, 

 tolid subfamiliae,) &c. (extinct genera.) 



Caterva 2. Platycephalichthyes. 



Ordo 31. Uranoscopi= Uranoscopini, Bp. 

 Familia 114. Uranoscopoidei. 



Gen. Uranoscopus, Gron. Ichthyoscopus, Swns. 



Ordo 33. Platycepbali. 



Familia 118, (2.) Callionymoidei = Callionymini, Bon. 



Gen. Callionymus L. Rarpagifer Richds. Ch.<enichthys Richds, 



Caterva 3. Blennii. 

 Ordo 34. Cotti. 



Familia 120, (2.) Cottoidei == Cottini, Bp. = Cottidae, Sws. 



Gen. Bovichthys, Cv., Cottus, L. and the typical Cottoids, but 

 two genera repeated (Aspidocottus, Gir. = Clyptoecottus 

 'Gir." Ayres) ; Hemilepidotus, Cuv. = Calycelepidotus, 

 Ayr.) 



Ordo 35. Blennii. 



Familia 121, (1.) Trachinoidei. 

 1861.] 



