105 



25. No caudal fin. Trachypteridje — XXI. 

 „ Caudal fin present. 26. 



26. Spines on each side of tail. Caraxgid.i:, part — XII. 

 „ Otherwise constructed. 27. 



27. YentraLs with more than five soft rays ; oi)crcular bone? 



armed with two distinct spines ; scales ctenoid. B. 8 or 4. 

 Berycid.i: — I. 

 „ Ventrals w ith five soft rays. 28. 



28. Caudal rounded ; body compressed and much elevated. 



B. 7 or 8. ScoMBRiD^, part — XI. 

 „ Caudal forked. V. 1 : 6. Percid^, part — II. 



29. A papilla near vent ; ventrals sometimes united. Gobiidje 



—XIII. 

 „ Without papilla ; ventrals not united. 30. 



30. Scales ctenoid. 70. 



„ Scales cycloid or absent ; with or without finlets. 31. 



31. Finlets absent. 



a. Lateral line not armed with plates ; A. fin with less 

 than tvrenty soft rays. Spiiyr.enid.^: — XVI. 



b. Lateral line often armed with ])lates ; two A. spines 



remote from soft portion 5 soft rays more than 20. 

 CARAXGiD.ii, part — XII. 

 „ Finlets present. 32. 



32. Ventrals long ; scales cycloid, moderate ; body oblong, com- 



pressed ; teeth small.*^ Scombrid.15, part— "XI. 

 „ Ventrals moderate ; scales absent, or moderately small ; 

 teeth variable ; V. sometimes rudimentary, or absent ; 

 body elongate, compressed. Scombrid.k, part — XI. 



33. Ventrals jugular. 34. 



„ Ventrals abdominal. 38. 



34. Spinous dorsal greater than the soft ; scale small, or naked ; 



one, two, or three dorsal fins (small fish). Blennid^e — 

 XV. 

 „ Spinous dorsal less than the soft. 35. 



35. One dorsal fin. 36. 

 Two dorsal fins. 3' 



?) 



36. Ventrals of a single bifid ray ; a small portion of the D. and 



A. formed into true spines. Gadopsid^ (Gadopsis 



MARMORATUS) XXIV. 



„ Ventrals 1 : 5. Mouth vertical or oblique. Trachixid^, 

 part— VIII. 



37. Body frequently covered with minute spines ; cari)al bones 



prolonged, forming a sort of arm for pectorals; gill- 

 opening reduced to a small foramen, situated in or near 

 axil ; tentacle sometimes plumose on snout. Pediculati 

 —XIV. 

 ,, Body smooth or scaly ; teeth in villiform Imnds, sometimes 

 with pointed and coin'cal canines ; gill-opening wide ; 

 eyes frequently directed upwards. Trachimdje, part 

 — VIIL 



