1907.] NATURAL SCIENCES OF PHILADELPHIA. 4G3 



from vent conii)rcsse(l, tapering but little and ending in an abru[)t tip 

 (damaged). 



Head rather large, broad, and rather depressed more or less both 

 above and below. Snout broad, its surface convex, and longer than 

 broad by about an eye-diameter. Eye rather large, lateral, without 

 lids, or covered by skin of head, a little longer than deep, and placed in 

 last fourth of head measured to first gill-opening. Mouth large, 

 rounded to rather an ellipsoid shape, and its width thus about 1^ in 

 its length. Disk thus formed furnished with a fringe of short fleshy 

 tentacles, posterior of which are much longest and edges of each all 

 armed with short fringes. Longest of these posterior flaps about half 

 of horizontal orbital diameter. Surface of disk studded with rather 

 numerous teeth, much smaller and more or less imbedded in outer 

 series. Anterior and on inner sides teeth large and all more or less 

 arranged in concentric radiating series. Inner enlarged teeth on 

 each side as 4 bicuspids and a single antero-median biscuspid. Cusps 

 of all these about similarly developed. Posterior inner dental crescent 

 with its margin converging to a small narrow median trenchant edge, 

 where there are 7 small blunt obsolete closely crowded cusp-like 

 points, so as to appear spout-like. Anterior lingual tooth with a 

 deep median groove, terminating in an incurved point and with 7 

 scrratures right and 6 left. Posterior lingual teeth consisting of two 

 L J-shaped patches of teeth with about a dozen serratures in each. 

 Nostril with a slightly elevated cutaneous rim and placed midway in 

 intcrorbital space opposite front rim of eye. Interorbital space 

 broadly convex. 



Gill-openings 7 on each side of pharynx a trifle inferiorly, and anterior 

 nearer posterior than tip of snout by about half length of latter. Gill- 

 openings becoming a trifle larger as they progress posteriorly and 

 about equalh' far apart. 



Skin smooth, rather soft and thin. No evident mucous pores. 



Origin of first dorsal about midway between tip of caudal (evidently 

 damaged) and first gill-opening, reaching its greatest height about 

 first I in its length and margin rounded. Second dorsal distinct from 

 first, not connected basally, and inserted a trifle before last fourth in 

 entire length of body, and its greatest height apparently a little after 

 vent. Caudal apparently damaged and then healed. After vent a 

 low thin median cutaneous ridge extending back and apparently 

 joining lower caudal lobe. Vent with a small papilla. 



Color in alcohol plumbeous-brown above, more or less uniform, and 

 shading off on sides to paler or grayish-white, and lower surface all 



