4*J2 MYLIOBATID^. 



appears to be distinguished from M. nieuhojii bj* a less broad disk. 

 The narrowness of the teeth, length of the tail, and probably also 

 the coloration are signs of the immature state of the examples 

 examined, but not specific characters. 



22. AETOBATIS. 



Aetobatis, Miill. 8f Hcnle. 

 Stoasodon, Cantor. 



Form of the head, body, and tail as in MrjUohatis. The nasal 

 valves remain separate, each forming a long flap. The lovrer dental 

 lamina projects beyond the upper. Teeth flat, broad, forming a 

 single series, equivalent to the median series of Mijliohatis, there 

 being no small lateral teeth. 



Tropical seas. 



1. Aetobatis narinari. 



Narinari, Marqjr. pp. 175, 17G; Willuffhhy, p. G6, tab. C 1. lig. 5. 

 Raja narinari, Euphrasen, Vet. Ak. nyu JIandl. 17t)0, xi. p. 217 ; 



m. Schn. p. 8U1. 



flagelluin, lil. Schn. p. 301, tab. 73. 



Hiissell, Fitsh. Corom. i. tab. 8. 



Kaja guttata, Shmo, Gen. Zool. v. 2. p. 285, pi. 142. 



Myliobatis narinari, Ciiv. Hrz/ne An. ; Ben. in Life of Raffles, p. G94 ; 



Af/ass. Poiss. Foss. iii. pi. 1). 

 Raja quinqueaculeata, Qtioi/ S)- Gaim. Voy. Uran. p. 200, pi. J 3. 



tier. 3. 



Aetobatis narinai-i, Midi. S) Henle, p. 179; Bleek. Verh. But. Gen. 



xxiv. Plug. p. 87 ; Dumeril, Elusinohr. p. (341 ; Day, Fish. Mulah. 



p. 280. 

 flagellum, Midi. 8f Henle, p. 180; Bh/th, Jotini. A.s. Soc. Bcnrf. 



1800, p. 37 ; Dumeril, I. c. p. (j42. 

 Myliobatis eeltenkee, Biipp. N. W. Fisch. p. 70, taf. 10. fig. 3 (teeth). 

 Goniobatis flagellum, Ayuss. Proc. Bust. Soc. Nat. Hist. vi. p. .385. 

 niacroptera, M'Clc'll. C'ul,: Juurn. Nut. Hist. 1841, i. p. GO, pi. 2. 



fig. 1. 

 .Stoasodon narinari. Cunt. Mai. Fish. p. 434. 

 Aetubatis latirostris, Dumeril, Arch. Mus. x. p. 242. pi. 20, or l-llas- 



tnohr.'p. (;43 ; Giinth. Truns. Zool. Soc. 18()8, p. 401. 

 laticeps, Gill, Ann. Lye. Nat. Hist. New York, viii. p. 137. 



Body smoolli. Dorsal fin situated between the ventrals. Disk 

 generally with numerous round l)luish-white spot 



The teeth of the lower jaw arc sometimes ' arly bent, eomc- 

 times nearly straight. Our series of exam) ;■ lows clearly that 

 this difference is individual and does not co 5 a specific cha- 



racter. 



Tropical seas. 



a. Half-grown female : skin. Jamaica. Purchased of Mr. Parnell. 



h. Adult female : skin. Eahia. Purchased of M. Parzudaki. 



f. Half-grown. Bay of Panama. From the Collection of Messrs. 



Dow and Salvin. 

 ft. Young: skin. Pinaiig. From Dr. Cantor's ColleetioTi. 



