MORPHOLOGY OP TELEOSTEAM HEAD SXKLETON. 571 



pedicle and the trabeciilee. Such a condition exists in 

 Lepidosteus (Text-fig. 5), in which, at all stages from the 

 embryo two thirds of an inch long to the full-grown adult 

 (Parker, 82), the pedicle is strongly developed, and forms an 



rta.i. 



ri.(j. 2 



A<jm 



tf^f 



ricf. u. . 



(^up. 



au. 



Text-figs. 1—5. — Diafrrams illustrating the various modifications 

 exhibited by the quadrate and its processes iu the larvae of Bony 

 Fishes. 

 Fig. 1, Syngnathus (after Pouchet) ; Fig. 2, Belone (orig.) ; Fig. 3, Zoarces 

 vivipara (orig.); Fig. 4, Salmo trutta (modified from Winslow) ; Fig. 5, 

 Lepidosteus osseus (after Parker), e. Ethmoid, e.p.c. Parethnioid 

 cornu. e. pr. pre-ethmoid cornu. hj/m. Hyoniandibular. qu. Quadrate. 

 qu. pa. Palatine process of quadrate, qu. p. Pedicular process of same. 

 qu. m. Metapterygoid process of same. 



articulation with the " basipterygoid process." This stands 

 out from the same region of the trabeculse as that just 

 described for Amia. In the extinct Lepidotus also there is a 

 stout process of the metapterygoid which bears a large 

 facette, and which, according to Smith Woodward (95, p. 79), 



