296 THE PLAGIOSTOMIA. 



Total length 0.33, length of body 0.163, length of disk 0.155, and width of 

 disk 0.13 metres. 



Station 2664 Lat. 29° 41' N.; Long. 79° 55' W.; 373 fathoms. Albatross. 



Narcine. 



Nardne Henle, 1834, Ueber Narcine, p. 31. 

 Cyclonarce Gill, 1861, Ann. N. Y. lye, 7, p. 387. 

 Narcine Gill, 1861, Ann. N. Y. lye, 7, p. 387. 

 Gonionarce Gill, 1861, Ann. N. Y. lye, 7, p. 387. 



Disk subcircular, shorter than the tail; snout strong, produced, rigid in 

 adult; tail moderate, with two dorsals, a well-developed caudal fin and lateral 

 folds. Ventrals distinct, inserted below the ends of the pectorals. Mouth 

 transverse, protractile; teeth in narrow bands on the skin, which is loosely 

 attached to the jaws. Anterior nasal valves united in a broad, free-margined 

 flap reaching the mouth; posterior valves feebly developed. Spiracles close 

 behind the orbits or at a short distance from them, with or without a fringe of 

 papillae. Rostral cartilage elongate, stout, broad, trough or shovel-shaped. 



West Indies to Brazil; Australia; Northern Indian Ocean to China and 

 Japan. 



Spiracles fringed with papillae 



origin of first dorsal little behind ends of ventral bases 



caudal not angular, vertically subtruncate . hrasiliensis (page 297) 



bancrofti (page 298) 

 Spiracles with rudimentary papillae .... corallina (page 298) 

 origin of first dorsal httle behind bases of ventrals 



caudal angular, vertically truncate . . . lingula (page 298) 

 Spiracles without papillae, near the orbits ; nasal valves short 

 origin of first dorsal opposite ends of ventral bases 

 caudal elongate, rounded behind 



rostral ridges divergent ; brown, darker spotted indica (page 299) 

 origin of first dorsal little behind ends of ventral bases 



rostral ridges divergent; skin spotted, fight edges 



tijnlei (page 300) 

 rostral ridges strongly divergent; color uniform 



brunnea (page 300) 

 origin of first dorsal its basal length behind the ventral bases 



