SHORE FISHES OF GALAPAGOS ISLANDS 383 



may be probable that it is a young individual of Doydixodon frcinhi- 

 villei^ for the other differences between it and the adults of the latter 

 species are shown by different-aged specimens in our collection. 



We have about 50 specimens from Tagus Cove and Iguana Cove, 

 Albemarle ; from the east side and Mangrove Point of Narboro, 

 James ; Duncan ; Chatham ; Charles ; and Seymour. About Tagus 

 Cove the species was very abundant, occurring in large schools along 

 the shore in shallow water and feeding at the surface. 



Description of a tyfica,l speci7neii. — General appearance thick, 

 deep and heavy ; head especially large, being wider than the body, 

 profile of snout straight and steep, forming a prominent obtuse angle 

 with the profile from the eyes to the front of the dorsal. Lips thick; 

 premaxillary and maxillary both thick, the latter deeply concealed be- 

 neath the suborbital ; distal part of premaxillary rudimentary being 

 cartilaginous and fibrous, the bony part forming only front of jaw ; 

 a strong process from near outer end of posterior margin hooks 

 upward around the lower margin of maxillary. Teeth only in front 

 of jaws, similar, in several rows; each tooth consisting of 2 parts, 

 one short, fiat, vertical, forming the cutting part of the tooth, the other 

 elongate, slender and horizontal, forming a right angle with the first 

 and directed backward from it to its insertion posteriorly ; each nos- 

 tril somewhat tubular, the 2 equal, placed below the center of the 

 pupil ; preopercle entire, its angle rounded, the upper limb inclined 

 a little backward ; opercle with a short, wide, flat spine. .Spinous 

 dorsal very low, spines short and thick, depressed in a groove, alter- 

 nating, one more to right, next more to left, etc. ; twelfth longest, |^ 

 greater than eye ; last closely united to the soft dorsal ; soft dorsal 

 compared with spinous dorsal rather high, evenly rounded, the middle 

 rays longest ; anal spines short, thick and evenly graduated ; soft anal 

 higher than soft doi'sal, acutely angulated, the fourth and fifth rays 

 longest; both fins much thickened at their bases; dorsal XII, 15; 

 anal III, 15 ; caudal short, wide, posterior margin lunate, the upper 

 lobe a little the longer, somewhat shorter than the head ; pectoral 

 wide, reaching to near tip of ventral ; lateral line rather high, 

 concurrent with the back; scales large, cycloid, 51 in lateral line; 

 head naked except occipital region, supra-opercular region and median 

 part of preopercle ; membranes of soft dorsal, soft anal, pectoral and 

 caudal with small scales on their margins. 



The description quoted by Jordan and Evermann {Fishes of North 

 and Middle A?nerica^ II, p. 1382) for Doydixodon is from Giinther, 

 but belongs to another genus. The teeth are not " tricuspid." 



