34 BULLETIN OF THE 



PLATE Vin. 



A. Side view of skull, quadrato-pterygoid, hyomandibular, and Meckel's carti- 

 lage, mk, natural size ; lettering as in Plate VII. ; br-r, branchial rays ; c-hy, cera- 

 tohyal; tp, trabecular process of pterygo-quadrate ; y, ligament attaching trabecular 

 process to the skull; q-p, quadratic process of pterygo-quadrate j xx, orbito-nasal 

 pores. 



B. Side view of quadrato-pterygoid, hyomaudibular, etc., at rest in position 

 against the skull. All natural size. 



PLATE IX. 



Branchial cartilages and meckelian, lower view, size of nature, mk, Meckel's 

 cartilage ; b-hy^ basiiiyal ; c-hy, ceratohyal ; br-r, branchial rays ; b-br, basibran- 

 chials ; h-br, hypobranchials ; c-br, ceratobranchials ; e-br, epibranchials ; p-br, 

 pharyngobrauchials. 



PLATE X. 



Vertebrae : 1, side view of section from middle of body ; 2, longitudinal, and 4, 

 transverse section of same ; 3, longitudinal section from back of iiead (reversed), 

 all twice uat. size. 5, nerve aperture showing the calcareous lump at the side; 

 n, neurapophysis ; is, iuterspinous process ; nc, neural canal ; ch, notochord. 



PLATE XL 



1. Pelvis, upper view, ^^g- nat. />«, pubic; eV, iliac ridge ; (5/?, basipterygium. 

 (Reversed.) 



2. Pectoral cartilages, cr, coraco-scapular ; prp, propterygium ; msp, meso- 

 pterygium ; mtp, metapterygium. 



PLATE XII. 



Pelvis and ventral cartilages from beneath : cl, cloaca ; ab-p, abdominal pores ; 

 ua, urethral aperture. Size \\ nat. 



PLATE XIII. 



Cartilages of dorsal and anal fins, \ nat. : aa, radials of dorsal ; bh, radials of 

 anal ; cc, anterior radials of caudal. 



PLATE XIV. 



1. Tail with cartilages exposed, i\ nat. 



2. Tip of tail, \ uat. 



