NO. 15 



TWO NEW EELS AND A NEW FLATFISH REID 



the shaft of the vomer in an oblong patch of more or less bluntish teeth 

 to opposite the anterior edge of eye. Lateral teeth in four irregular 

 rows becoming broader anteriorly, all of nearly uniform size and 

 loosely attached, being depressible backward. A few teeth in the pre- 

 maxillary group slightly enlarged and caninelike. Tongue free anteri- 

 orly and laterally, narrow and acutely pointed. Snout projecting 

 slightly beyond tip of mandible so that the foremost teeth of the 

 premaxillary group are visible when viewed from beneath. Anterior 

 nostril in a short tube near tip of snout ; posterior one in a small pore- 

 like opening well before eye. Eyes large, about equaling snout, with 





Fig. I. — Ariosoma selowps. Holotype, U.S.N.M. 93310. a. Side view of head; 

 b, upper dentition ; c, isthmus. Natural size. Drawings by Mary Wallach. 



conspicuous adipose membrane partly concealing the orbital rim. Gill- 

 openings large, vertical, extending from upper third of pectoral base 

 to ventral surface, where they are separated by a narrow isthmus about 

 equal to pupil diameter. Gape moderate, about reaching opposite the 

 anterior edge of pupil. Lips forming a thin flange with a free superior 

 border, the basal portion behind the outer fold concealing small bony 

 supports similar to those found in Uroconger leptiirus Richardson. 

 Though distinctly present, they are much smaller than those found in 

 the above-mentioned species and are probably not functional as dis- 

 tendable supports of the lip. Pores of the head small, few in number 

 and not especially noticeable, one at the base of the nostril tube pos- 



