1915.] 



NATURAL SCIENCES OF PHILADELPHIA. 



525 



surface much narrower than upper and not keeled medianly. Snout 

 conic, sHghtly compressed, well protruding, basal width slightly 

 less than its length. Eye rounded, centre little behind first third 

 in head. Adipose eyelid well developed, covering eye entirely. 

 Mouth large, front above with slight median depression. Maxillary 

 straight, expanded slightly behind, the end attenuated a little 

 beyond mandibular articulation, though clearly not extending to 

 gill-opening, the expansion 2| in eye. Maxillary teeth uniserial, 

 close-set, fine, not continuous over front of mouth, and extending 

 back whole length of bone. Similar erect mandibular teeth, only 

 more minute and not continuous across symphysis. Vomer, pala- 

 tines and pterygoids each mth row or series of very minute simple 

 teeth. Tongue smooth small knob, anterior. Basibranchial shaft 

 minutely asperous. iVIandible convex over surface, constricted to 



Fig. 2. — Anchovia filifera Fowler. (Type.) 



point at symphj^sis, rami not elevated inside mouth or only gradually 

 slope to articulation behind. Mandibular tip extends forward not 

 quite to middle in postnasal length. Nostrils small, together, 

 slightly behind middle in snout leng-th. Interorbital evenly convex. 

 Each supraorbital ridge distinct, flaring out a little over each eye 

 in front. Cheek would form an isosceles triangle, its base about 

 f its length. Cheeks, opercles and top of head all very finely tuber- 

 culate, especially above. 



Gill-opening forward till about midway in eye. Rakers about 

 25 -1- 22, slender, pointed, compressed, inner edges minutely den- 

 ticulated, 1| in eye. Filaments If in eye. Pseudobranchise about 

 3 in eye. Isthmus long, slender, compressed, lower edge convex. 

 Branchiostegals 12, membranes united anteriorly only very short 



