THE FISHES OF PORTO RICO. 
837 
Ogcocephaunac: 
а. Disk with frontal region elevated and the snout more or less produced forward; the tail stout; orbits lateral: teeth 
on vomer and palatines; rostral tentacle present. 
б. Gills 2.5; disk longer than broad Ogcocephai,us,164 
Halieutin/e: 
aa. Disk with frontal region depressed, not elevated above the rest; eyes partly superior; snout rounded, obtuse in 
front; tail slender. 
c. Dorsal fin present. 
d. Vomer and palatines with teeth Halieutichth ys, 165 
dd. Vomer and palatines toothless. 
e. Disk subcircular; gills 2.5. 
/. Mouth rather small, terminal; prickles feeble Hameutella 
ee. Disk subtriangular; gills 2; prickles very strong Dibranchus 
Fig. 110. — Ogcoceplialus rexpertilh,, dorsal view. 
Genus 164. 0GC0CEPHALUS Fischer. Sea Bats. 
Body stoutish, tapering backward; head very broad and depressed, triangular in form, forehead 
elevated and produced. Eyes large, lateral. Mouth rather small, subinferior under s.mut; villiform 
teeth in bands, on jaws, vomer, and palatines. Skin covered with rough, bony tubercles. Dorsal and 
anal fins very small; rostral tentacle present, retractile into a cavity under a bony prominence on 
forehead; ventrals present, i, 5, well separated; pectorals large, placed horizontally. Gills 2.5. No 
air-bladder; no pyloric cseea. 
Tropical America, in shallow water. Small fishes of singular form, often regarded by the ignorant 
as venomous. 
a. Snout produced, rostral process pointed, 6 to 10 in length of body vespertilio, 289 
aa. Snout short, rostral process 12 to 15 times in length of body nasutus 
aaa. Snout short, rostral tubercle reduced to a button-like tubercle, which is about 25 times in length of body. . radiafus 
F. C. B. 1900—22 
