190* 



OF THE SUBORDER ALLOTRIOGNATHI. 



635 



forwards in the groove at the side of the vomerine keeL This is 

 quite a diflerent arrangement to that usually found in fishes with 

 pi'otractile mouths. In the Berycoids the maxillary is articulated 

 proximally to the vomer and has a ligamentous attachment to an 

 anteiior process of the palatine, so that only the distal end moves 

 forward when the prtemaxillaries are protruded. In Lamqms^ 

 however, it is the maxillaries which are protractile and which 

 carry the prtemaxillaries forward. 



Text-fiff. 1(56. 



Cranium of JLampris Juna. 



v., vomer ; f., frontal ; p., parietal ; so., supraoccipital ; ejpo., epiotic ; sie., supra- 

 temporal (pterotic) ; eo., exoccipital ; bo., basioccipital ; jjs., parasphenoid ; 

 jyro., prootic ; ptf., postfrontal (sphenotic) ; as., alisphenoid ; os., [orbito- 

 sphenoid; «#/;., ethmoid; jjj^., prefrontal. 



There is no supramaxillary bone. Except for the absence of a 

 maxillary process of the palatine, the bones of the hyo-palatine 

 and opercular series exhibit no departure from the normal type. 

 The suborbitals do not form a subocular shelf. The branchiostegal 

 rays are six in number. 



There are 46 vertebrae, 21 prsecaudals and 25 caudals. The 

 centra ai-e solid and co-ossified with the arches. The first centrum 

 is convex anteriorly, fitting the concavity formed by the basi- and 

 ex-occipitals. There are no parapophyses and the long ribs are 

 sessile. The pectoral arch has been figured by Boulengei- * ; the 

 forked post-temporal is attached to the epiotic above and to the 

 exoccipital below ; the coracoids are greatly expanded ; the rays of 



* Ann. Mag. Nat. Hist. (7) x. 1902, pp. 147-152, fig. 



