10 PROCEEDINGS OF THE ACADEMY OF [Feb., 



rather large, close to upper profile, without eyelid, centre a little 

 before first third in head. Mouth rather large, wide, rictus extending 

 back behind pupil centre, though not quite opposite hind eye 

 edge. Maxillary extends back trifle behind hind eye edge. Lips 

 rather fleshy, broad laterally. Jaws strong. Teeth largely uniserial, 

 uniform in size, conic, sharp-pointed, close-set and slightly inclined 

 back along edges of jaws. In upper jaw front patch of slightly 

 larger premaxillary teeth, these conic, sharp-pointed, and form 

 continuous area back on front of vomer. Vomerine teeth similar to 

 premaxillary teeth, in somewhat triangular area with apex directed 

 back or towards pharynx, and teeth rather sparse behind. No other 

 teeth on mouth roof. Teeth in mandible not continuous across 

 symphysis, and an outer and inner series of small similar teeth on 

 anterior portion of each ramus. Tongue smooth, elongate, rather 

 narrowly triangular, and free in front. Mandible strong, shallow, 



Fig. 1. — Leptocephalus caudalis Fowler. Typo. 



with low rami. Front nostril in short fleshy tube near snout tip. 

 Hind nostril simple pore close before front rim of eye. Interorbital 

 narrowly constricted bony ridge, surface convex. 



Gill-opening begins opposite supero-median pectoral ray bases, 

 curves slightly forward in crescent, about If in eye. Pharynx but 

 little swollen. 



Skin smooth. A pair of pores on upper lip at snout tip between 

 nasal tubes, and immediately behind though more widely separated 

 at point about first fourth in snout length another pair. Still 

 closer than either of these pairs a third pair of inconspicuous pores 

 on snout superiorly placed about first third in its length. A series 

 of 6 pores from close after nasal tube till below lower front eye edge. 

 Row of 9 pores on lower side of head beginning close behind man- 

 dibular symphysis, and last one just below opercle front on branchi- 



