422 



PROCEEDINGS OF THE ACADEMY OF 



[Oct., 



will til of lioacl 5V; snout 4^; gape 3; maxillary 2A ; eye 3} in snout; 

 interorbital space 2. 



Body long, slender, compressed, and edges api)arently convex. 

 Cireatest depth at thorax, and otherwise trunk of about equal depth 

 throughout. Tail long, slender, more or less compressed and tapering. 

 Head and trunk H in tail (damaged). 



Head small, compressed, attenuated, and swelling into a rather 

 deep thorax. Jaws long, slender, and with upper a little more con- 

 vexly elevated than lower. Snout long, slender, its tip projecting well 



^■Vt"'-'?'^' 





Fig. 2. — Murauiicfithys derisi Fowler. (Type.) 



beyond mandible, and its sides rather steep. Eye large, a trifle longer 

 than deep, its center falling about last fourth in space between tip of 

 snout and corner of mouth, and its lower margin close to edge of 

 mouth. Maxillary concealed, though projecting a little beyond pos- 

 terior corner of mouth. Mouth large, gape long. Jaws slender, rather 

 narrow and furnished with rather large teeth. In upper jaw along 

 edges teeth biserial, and on vomer imiseriaL Teeth in mandible at 

 first biserial a short distance from symphysis, and then uniserial, 

 though of somewhat irregular size. Teeth in upper jaw not quite so 

 irregular in size. Anterior nostril in a small tube near tip of snout, 

 and posterior a rather large pore on lower external margin of upper 

 lip just below front of eye. Interorbital space rather narrow and 

 convexly elevated. 



Gill-opening small and a little low. 



