BRANNER-AGASSIZ EXPEDITION TO BRAZIL l8l 



6 in number, the membranes broadly joined, free from the isthmus. 

 The opercle is rounded, without ridges or spines. 



Scales large, cycloid, the lateral line running high anteriorly, de- 

 scending to the middle of the flanks behind the pectoral fin, and trav- 

 ersing 37 to 39 scales. 



Dorsal largely spinous, the last 7 rays articulated. A faint notch or 

 none behind the third dorsal spine. A decided notch behind the eigh- 

 teenth spine, the three following spines gradually increasing in length. 



Two anal spines, the first elongate, detached, running along the 

 posterior margin of a broad membranous or fleshy expansion, which 

 extends beyond its tip. The second spine is much shorter and is 

 joined by membrane in the usual way to the first soft ray. Both dor- 

 sal and anal fins are distinct from the caudal, the last dorsal mem- 

 brane nearly touching the base of the first caudal ray. No hook on 

 shoulder girdle. 



Color in spirits, dark brown, with some lighter rivulations and with 

 occasional black spots, or blotches. A small black spot on the oper- 

 cular membrane above the base of the pectoral. Back with ten dusky 

 bars which are continued on to the basal portion of the dorsal fin, 

 where each divides to form a pair of black blotches; 7 or 8 dark 

 spots along the base of the anal. An irregular light-colored Y-shaped 

 mark on the cheek ; two or three small round spots on the opercle, 

 and three vertically placed on the basal portion of the pectoral fin. 

 All of these light markings may have been brightly colored in life. 



Length to base of caudal 26>^ mm. 



Total length 31 mm. 



Head (to end of opercular flap) 34 of length. 



Tip of snout to end of maxillary 16 



Snout 06^ 



Orbit ... 09>^ 



Interorbital width o2}4. 



Depth of body 2i>^ 



Least depth of caudal peduncle 09 



Length of caudal peduncle from last anal ray . .06 

 Tip of snout to base of first dorsal ray ..... .30 



Tip of snout to base of first anal ray 53 



Tip of snout to base of first ventrals 28 



Longest pectoral ray 23 



Longest (inner) ventral ray 18 



Highest (middle) dorsal spines 10 



Shortest ( 1 8th) dorsal spines 06 



(19th) dorsal spines 06 -f- 



(20th) dorsal spines 07^ 



(21st) dorsal spines 10 



