13888 Bulletin //, United States National Miiseiim. 



h. Pectoral rather narrow, the lower rays similar to the others. 



CCVI, ZOARCID.E, 2455. 

 hb. Pectorals very broad, the lower rays procurrent and produced 



at tip CLXXXIII, LiPARiDiD.E, 2105. 



aa. Body short, not elongate; dorsal and anal free from caudal. 



c. Teeth in each jaw confluen fnto 1. 



d. Body compressed, rongh CLXX V, Moiadm, 1752. 



del. Body not compressed, spinous CLXXIV, Diodontid.e, 1742. 



<:e. Teeth in each jaw confluent into 2. 



X. Back broadly rounded CLXX 1 1, Tktraodontid.e, 1726. 



XX. Back with a sharp median ridge. 



CLXXIII, Cantiiigasteuid.e, 1740. 

 ccG. Teeth separate; body enveloped in a Ijony box. 



CLX'XI, OSTRACIID.E, 1721. 



VV. Breast with a sucking disk. 



e. Skin perfectly smooth; dorsal continuous or slightly notched. 



CLXXXIII, LiPARiDiD/E, 2105. 

 ee. Skin more or less tubercular; dorsal usually divided. 



CLXXXII, C YOLO PTERin.E, 2094. 

 TT. Gill membranes free from the isthmus. 

 /". Vent at the throat. 

 g. Vertical lins confluent; body elongate, almost eel-shaped. 



CCX, FlKRASFERID.E, 2494. 



gg. Vertical tins sei)arate; body oblong, scaly. 



XCill, Amblyoi'Sid.e, 702. 

 f. Vent posterior, not at the throat. 

 h. Caudal fin wanting; body naked, greatly elongate. 



CXXI, Triciihrid.e, 888. 

 hh. Caudal fin present. 

 i. Upper jaw prolonged into a sword; size very large. 



CXXIII, XiPHiiD.E, 893. 

 it. Upper jaw not prolonged into a sword. 

 j. Belly with a series of bony scutes along its edge; body nmch 



compressed LXI, Clupeid.e, 417. 



.//■ Belly not armed with scutes. 



k. Mouth inordinately large, formed like the mouth of a whale, 

 with sharp teetli ; no scales. . . LXXl V, Cetomimid.e* 548. 

 kk. Mouth not inordinately large, not peculiar in form. 

 /. Body ovate, much compressed. 



m Scales small, cycloid, silvery CXXXV, Stromateid.e, 964. 



mm. Scales wanting; caudal peduncle very slender. 



CXXXVI, ICOSTEID.E, 968. 



/. Body oblong or elongate, much longer than deep. 

 n. Gill membranes liroadly united; teeth present. 



Dorsel fin of spines (mly CC, Blenniid.e, 2344. 



00. Dorsal fin of soft rays only; body eel-shaped. 



CCV, SCYTALINID.E, 2453. 



ooo. Dorsal fin single, the posterior half of soft rays, the anterior of 

 spines; body elongate, covered with small scales. 



CC, Blenniid K, 2344. 

 0000. Dorsal fins 2, the anterior of slender spines, posterior soft, body 



naked CLXXIX, Cottid.e, 1879. 



nn. Gill membranes separate. 

 J). .Taws toothless, the lower jaw projecting; body scaly, with cross 



folds of skin CX, A.MMODYTIDyE, 831. 



})}). .Taws with teeth. 

 <j. Body naked, without folds of skin ; no pseudobranchia^. 



CCIX, Lycodapodid.e, 2491. 

 qq. Body with small scales; pseudobranchiic preseut; head with 

 very large mucous pores; lower jaw very strong. 



CXXXVIb, ZAPRORIDyE, 2849. 



