BY C. D. GILLIES AND EDNA. F PKBERDY. 47 



is convex, and near the junction with the corresponding 

 coracoid is a slender cartilaginous cornu (Fig. 1, c), which 

 travels posteriorly to the body wall. The procoracoids 

 are paired cartilaginous bars, running from the anterior 

 ends of the epicoracoids to the glenoid regions of the girdle 

 (Figs. 1 and 2, g.c.) In the triangle formed by the coracoid. 

 epicoracoid and procoracoid of each side, is the coracoidal 

 fenestra (Fig. 1, cor. fen), which is oval in shape. The 

 clavicles (Figs. 1 and 2, cl.) are paired and ossified. They 

 are curved, with the concavity facing anteriorly, and almost 

 completely invest the procoracoids, but the posterior 

 borders of the latter are uncovered. On each side the 

 glenoid cavity (Figs. 1 and 2, g.c.) is formed by the coracoid, 

 scapula, clavicle, and procoracoid. The scapula (Fig. 2) 

 is similar to that figured by Parker. In the glenoid region 

 the scapula is bifid, and the prescapular process (Fig. 2. 

 pr. sc.) is the longer of the two portions. Between the 

 latter lies the glenoidal foramen (Fig. 1 and 2, g. for.., g.f.). 

 The distal border of the scapula is straight, and the anterior 

 and posterior are concave. The suprascapula (Fig. 1, 

 s. sc), is attached to the distal border of the scaj)ula (Fig. 2). 

 It is four-sided, and lies dorsally. Parker described the 

 anterior border as being convex, and draws attention to 

 the statement. We found that both the anterior and 

 posterior borders are concave. Part of the suprascapula 

 is ossified (Fig. 2, os.), but the remainder is cartilaginous 

 (Fig. 2, cal.) The ossified region arises along the scapula- 

 suprascapular junction. Distally it is bifid. The anterior 

 arm is more or less uniform in width, while the posterior 

 is somewhat triangular in most examples. The anterior 

 border of the suprascapula is ossified, but the posterior 

 and distal are cartilaginous. 



The omosternum of Parker's Calamites cyanea is 

 " shark tooth shaped," to use his words, and furnished 

 with an " ectosteal crown." At the base are two soft 

 diverging fangs or processes. We find that the omosternum 

 is a cartilaginous oval or circular plate (Fig. 1, omos). 

 Beddard states that the sternum of Hyla casrulea exactly 

 resembles that of Parker's Acrodytes daudinii (? a Hyla). 

 The omosterna examined by us resemble that figured 

 for the latter (pi. vii., Fig. 1), but the long axis in the oval 



