ceratobranchials 



epibranchials rS^' 



pharyngobranchials 



::;= basibranchials 

 hypobranchials 



epihyal 



' }j ventral hypohyal 

 ceratohyol 



Figure 159. (opp. page)— External features 



of other representative ostraciid genera: 



A, Rhinesomus bicaudalis— 



upper left, nasal region as seen 



externally and, lower left, 



outline of cross section of 



middle of body; B, R. triqueter— 



to show the course of the 



inconspicuous lateral line 



canals and their major pores. 



as decifered by placing drops 



of ink on each pore found by 



microscopic search of a partially 



drying specimen; C, R. triqueter— 



upper left, nasal region as 



seen externally and. lower 



left, outline of cross section 



of middle of body, with pattern 



of scale plates shown only 



behind pectoral fin on main 



body illustration. 



branchlostegal rays 



Figure 157.— 4cant/io»tracion lateral and dorsal views of urohyal; 



quadricomig: dorsal view of composite based on several specimens, 



branchial arches (extended on lower 58.2-350 mm SL, Gulf of 



side); lateral view of hyoid arch; Mexico and Caribbean. 



Figure 158.— 4conf/io»trocion quadri- 

 comis: lateral view of caudal fin 

 supporting structures, composite 



based on several specimens, 



58.2-350 mm SL, Gulf of Mexico 



and Caribbean. 



l;^ 



I u~^i 



