﻿IX. D. 1 



Day: Ophiocephalus striatus 



55 



Plate XIV 



Interneural spines and dorsal rays and interhaemal spines and anal rays. 



44, interneural spine, an- 117, 19th and 20th interhaemal spines, 

 terior abdominal. 118, 3d anal ray. 



45, dorsal rays. 



57, interhaemal spine. 



58, anal rays. 



82, interneural spines. 

 116, second dorsal ray, 

 from left side. 



119, 24th ray of anal fin. 



120, 4th to 11th anal rays. 



121, 6th ray of dorsal fin, from pos- 



terior end. 



Plate XV 



Branchial arches, articulated. 

 17, basibranchials. 



19, ceratohyal. 



20, epihyal. 



21, interhyal. 



22, branchiostegals. 



23, upper or superior 



pharyngeals. 



24, hypobranchials. 



25, lower or inferior pharyngeals. 



64, epibranchials. 



74, epibranchials, modified of 1st 



branchial arch. 

 84, hypohyal. 



133, patches of cardiform teeth on 

 branchial arches. 



Plate XVI 



Branchial arches, disarticulated. 

 17, basibranchials. 



23, upper, or superior 



pharyngeals. 



24, hypobranchials. 



25, lower or inferior 



pharyngeals. 



63, ceratobranchials. 



64, epibranchials. 



65, glossohyal, central, more solid 



portion. 

 74, epibranchial, modified of 1st 

 branchial arch. 



text figures 



Fig. 1. Caudal vertebra, the last but 2 (131), anterior view. 



2. Atlas (70) ; axis (87) ; 3d, 4th, and 5th vertebrae; interneural 



spines; dorsal rays; and anterior dorsal radials (85 and 115). 



3. Hypohyals (84), ceratohyals (19), epihyals (20), and branchios- 



tegal rays (22). "Teeth" are found on some of the rays. 



4. Urohyal (68), anterior view. 



5. Dorsal ray, interneural spine, and ray, interhaemal spine, and carti- 



laginous nodules. The nodules are seen between the rays and 

 spines. 



6. Glossohyal (65) ; basibranchials (17) of the 1st, 2d, and 3d bran- 



chial arches from the left side; the basibranchial of the 2d arch 

 in detail. 



7. Glossohyal (65), dorsal view, showing the more solid central 



portion. 



