1916.] 



XATIHAL S( [EN< BS OI PHILADELPHIA'. 



I lit 



snout 3| in head, measured from upper jaw tip; eye 1!: maxillary 

 3; interorbital 2, 1 , . 



Body moderately long, also moderately depressed anteriorly, well 

 compressed behind, back scarcely elevated. Caudal peduncle 

 robust, well compressed, about long as deep. 



Head moderately short, wide above, upper profile uearly straight 

 from snout tip to oeciput and less inclined than lower. Sid.- of 

 head moderately approximated below. Snout short, depressed, 

 length about § its width. Eye rounded, high or close to upper 

 profile and its centre near first f in length of head. Mouth rather 

 small, lateral cleft -light, oblique. Premaxillaries well protractile. 

 Maxillary extends down till close before front edge of eye. Lips 

 moderately fleshy. Teeth all simple, conic, in bands in jaws, and 



1 iu. 1. — Fundulus anlillarum Fowler. 



outer row enlarged and slightly curved. Upper and lower inner 

 buccal folds moderately wide, entire. Tongue fleshy, depressed, 

 elongate, end rounded and free in front. Lower jaw robust, pro- 

 trudes beyond upper, convex over surface and in profile. Nostrils 

 superior in front of interorbital space and front edge of eye. Inter- 

 orbital space depressed or flattened, and slight median transver-c 

 depression over front of eyes. Hind preopercle edge slightly inclined 

 forward. 



Gill-opening extends forward about opposite hind edge of eye. 

 Gill-rakers 2+9, lanceolate, about half length of gill-filaments 

 which slightly less than horizontal diameter of eye. Isthmus wide. 

 Branchiostegals 4. 



Scales moderate with concentric striae, larger on front predorsal 



