Soft dorsal inserted close behind pectoral hte 
with front elevated lobe little longer than pectoral or 
21/8 to 2 2/3 in combined head and trunk. Front anal 
lobe longer, also much longer in half-grown, 1 2/5 to 
2 1/3 in head; pectoral 23 to 3%, largest in half-growm, 
In alcohol brown, sides paler, Length 85 to 185 mm, 
Drawing by Richard from Rio Janeiro, These examples 
invite comparison with material in the Academy from Colon, 
Panama, Nantucket, and a young specimen, also without lo- 
a cality, all of which are included above, 
In no a can we separate the Wilkes specimens, Un- 
fortunately the larger scales have all fallen from our 
largest (Nantucket) example, 
Fowler has erroneously identified an example? / 
as 5S. 
xanthurus Quoy and Gaimard, as Riberio has suggested that 
Quoy and Gaimard's species possibly belongs in Poronotus 
Gi1°8_ This is in view of the description of “la ligre 
laterale supérieure est tres recourbée vers le haut, tandis 
que 1" inferteure est horizontale et a peine sensible”, 
However Quoy and Gaimard also state “corps orbiculaire, 
tres comprime, parvu le grandes naglolires en dessus et 
en dessous”"., The dorsal rays are described as “les six 
t? 
premiers s'alongent en filamens," the anal is also said 
| ; 
to-be very large, and faleiform, and “les ecailles sont 
imperceptibles”. Rhombus argentipinnis Cuvier, R. crenu- 
latus Cuvier and R. orbicularis Guichenot were placed as 
97 Proc, Acad. Nat. Sci. Phila.,1906, p. 119. 
(eC TR OE EE a OE SR 
