SHORE FISHES OF GALAPAGOS ISLANDS 383 



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

 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 typical specimen. 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, flat, 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 dorsal, 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 America, II, p. 1382) for Doydixodon is from Giinther, 

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



