PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 415 



SYNONYMS AS ORDERS. 



<^Sclerodermi, Bonaparie, Gioru. Arcad. di Scienze, v. 52 (Saggio Distrib. Metod. 



Auimali Vertebr. a Sangue Freddo, p. 39), 1832. 

 = Balistides, Sleeker, Enurn. Sp. Pise. Arcliip. Indico, p. xiv, 1859. 

 = Les Balistes, Sleeker, Atlas Ich. des Indies N^erland., t. 5, p. 85, 1865. 

 = Balistidi, Sleeker, Ned. Tijdscbr. Dieik., v. 3, p. 8, 18G6. 



Plectognathi with a spinous dorsal or single spine just behind or 

 over the cranium, with a normal pisciform shape, scales of regular 

 form or more or less spinigerous, and distinct teeth in the jaws. 



TRIACANTHID^. 



SYNONYMY. 



<ScMroderme8, Cuvier, R^gne Animal, le. 6d., t. 2, p. 149, 1817; 2e 6d., t. 2, p. 371, 



1829. 

 ^Balistidfe, Nardo, Atti Congressi Scienz. Ital. rac. et ord., v. 1, p. 70 (1842), 1884. 

 =Triacanthoidoi, ^ZeeAer, Enum. Sp. Pisciiim Archipel. Indico, p. xiv, 1859; Atlas 



Icb. des Indes Neerland., t. 5, p. 85, 1865. 

 <^Sclerodermi, GUnther, Cat. Fishes Brit. Mus., v. 8, p. 207, 1870. 

 =Triacautliid8B, Cope, Trans. Am. Phil. Soc, v. 14, p. 458, 1870; Proc. Am. Assoc. Adv. 



Sci., V. 20, p. 340, 1872. 

 =Triacantlioidei, Sleeker, Ned. Tijdschr. Dierk., v. 3, p. 8, 1866. 

 Balistaj sp., Fitzinger, 1873. 



Scleroderms with a pair- of large ventral spines normally articulat- 

 ing with the pelvic bones, and with rounded scales, more or less spinig- 

 erous. 



TEIACANTHODIN^. 



SYNONYMY. 



=Triacanthodin», Gill, Proc. Acad. Nat. Sc, Phila. 1862, p. 235, 1862. 

 =:Paratriacanthiformes, ^?eeA-er, Nederl. Tijdschr. Dierk., v. 3, p. 9, 1866; Atlas Ich. 

 des Indes Neerland. , v. 5, p. 85, 1865. 



Triacanthidoe with conical teeth in both jaws and a short oblong- 

 caudal peduncle. 



Two genera are known, TriacantJwdes (Bleeker), with two rows of 

 teeth, and Rollardia (Poey), with a single row in each jaw. 



TRIACANTHIN^. 



SYNONYMY. 



<^Triacanthiens, Hollard, Annales Sc. Nat. (4), v. 13, p. 46, 1860. 

 =Triacanthiforme8, Sleeker, Nederl. Tijdschr. Dierk., v. 9, p. 9, 1866; Atlas des Indes 



Nderland., v. .5, p. 85, 1865. 

 <;TriacanthiDi, Poey, Repertorio Fis. Nat. de Cuba, v. 2, p. 210, 1868. 



Triacanthidse with incisorial teeth in both jaws (|§), and with a long, 

 narrowed caudal peduncle. 



Triacanthus, the only known genus, has a short inner row of rounded 

 teeth in each jaw. 



