298 THE PLAGIOSTOMIA. 



somewhat yellowish. A considerable variation obtains in different individuals 

 and in a single individual at different ages, also in the species at different portions 

 of its range. Two of these, sufficiently distinct for recognition, are given below. 

 Coast of Brazil. 



Narcine brasiliensis bancrofti. 

 Plate 26, fig. 2. 



Raia laevis Groncw, 1763, Zoophy., 1, p. 37, no. 158, pi. 9, f. 3. 

 Torpedo bancrofti Griffith, 1834, Cuv. anim. kingd., 10, pi. 34. 

 Torpedo pidus Gray, 1854, Gron. syst., p. 13. 

 Narcine punctata Garman, 1881, Bull. M. C. Z., 11, p. 233. 



Brown color of the back leaden or greyish, areas similar to those occupied 

 by the blotches of N. brasiliensis are more or less completely indicated in outline 

 by small spots of dark irregularly scattered over the disk. 



Jamaica to St. Vincent. 



Narcine brasiliensis corallina. 

 Plate 26, fig. 3. 



Narcine corallina Garman, 1881, Bull. M. C. Z., 11, p. 234. 

 Narcine umbrosa Jordan, 1884, Proc. U. S. nat. mus., 7, p. 105. 



Narcine brasiliensis Jord. & Everm., 1896, Bull. 47, U. S. nat. mus., p. 78, pi. 13 (part); Coles, 1910, 

 Bull. Amer. mus. nat. hist., 28, p. 337. 



Orange or red, with a dark brown band across the head, interrupted on the 

 forehead, and with small spots of dark to some extent outlining areas resembling 

 in shapes and positions those occupied by the blotches of N. brasiliensis. 



Florida Keys. 



Narcine lingula. 



Narcine lingula Richardson, 1846, Rept. Brit, assoc. adv. sci. for 1845, p. 196; Dumeril, 1865, Elasm., 

 p. 516; GiJNTH., 1870, Cat. fishes Brit, mus., 8, p. 452. 



Disk less than haK the total length, broad, subovate, nearly round, slightly 

 narrowed and margins straighter opposite the head, wider than long. Snout 

 strong, broadly rounded in front. Crown convex transversely. Anterior nasal 

 valves confluent in a broad flap, free on the hind margin, reaching the teeth in 

 a rounded prominence; angles rounded. Posterior valves quite rudimentary, 

 absent around the uncovered portion of the nostril, slightly developed in a thin 

 fold back from the middle of the nostril toward the angles of the mouth. Mouth 

 protractile; teeth-bands moderate, semicircular on outer margins; teeth small, 

 each with a prominent acuminate cusp on the inner edge of the crown, in M rows 



