164 PROCEEDINQS OP THE ACADEMY OP [1884. 



Macrorhamphosids with a deep body, abruptly contracted 

 caudal peduncle, an excurrent peaked back, and about four to five 

 dorsal spines. 



Type, G. humerosus = Centriscus humerosus Richardson. 



AMPHISILID^. 



Family Synonyms. 



= AmpMsiloidei, Bleeker, Enum. Sp. Piscium Arcliip. Ind., p, xvi, 1859 ; 



Atlas Ich. des Indes Neerland., t. 5, p. xv, 1865. 

 := AmphisiUdcB, Cope, Proc. Am. Assoc. Adv. Sci., v, 20, p. 338, 1873. 

 = AmphisilidcB, Gill, Arrangement Families Fishes, p. 25, 1872. 



Subfamily Synonym. 

 = AmpMsilinm, Gill, Proc. Acad, Nat. Sci, Phila, (v. 14). p. 284, 1862. 



< CentriscidcB, pt., Giinther, 1861, 



< Oentrisci, pt., Fitzinger, 1873. 



Hemibranchs with six or more anterior vertebrae extremely 

 elongated, the caudal much abbreviated, paired selliform dorsal 

 plates connected with the neuropophyses of the dorsal vertebrae, 

 and lateral ones developed in connection with the ribs, an elon- 

 gated tubiform mouth, abdominal ventrals, two dorsals, and with 

 the entire caudal portion of the body deflected downwards by the 

 encroachment of the dorsal cuirass over the dorsal fins ; and with 

 the " fourth supra-branchihyal, and all the superior pharyngeals 

 wanting " (Cope). 



CENTRISCTIS. 



=^ Centriscus, Linn., Syst. Nat., 10, ed., v. 1. 



< Centriscus, Linn., Syst. Nat., 12. ed., v. 1. 



< Amphisile (Klein), Cuvier, Regne Animal, t. 2, p. 350, 1817. 



= Acentrachme, Gill, Proc. Acad. Nat. Sci, Phila. (v. 14), p. 234, 1862. 

 = Amphisile, s, g, Acentrachme, Liitken, Vid. JVIedd. Naturhist. Foren, 

 Kjobenhavn, 1865, p. 215, 1866. 



Amphisilids without a movable spine connected with the pos- 

 terior process of the dorsal cuirass. 

 Type, G. scutatus. 



AMPHISILE. 



< Amphisile, Klein, Hist. Piscium Nat. promov. Miss., p. 28, 1744 (not 



binomial), 



< Amphisile, Cuvier, Regne Animal, t. 2. p. 350, 1817. 



= Amp7dsile, Gill, Proc, Acad. Nat, Sci, Phila. (v, 14), p, 234, 1862, 

 =^ Amphisile. s. g. Amphisile, Liitken, Vid. Mcdd. Naturhist. Ftireu. Kjo- 

 benhavn, 1865, p. 215, 1866. 



