1 14 list of fish. 



1. Uraptera Agassizii. 

 Uraptera Agassizii, Miill. $- Henle, Plug. 155. 

 Hab. — Brazil. 



5. The fore points of the breast- fins unite together before the 

 head, and form the fore point of the disk. The upper eyelid is ad- 

 nate. The two inner nasal-flaps are protuberant, and have a com- 

 mon, free, shortly fringed under border, which is fastened in the 

 middle only by a slender bridle to the upper-jaw. The inner cor- 

 ners of the nostril are closely approximated to each other under the 

 nasal-flap. Outer nasal-flap wanting. The skull is higher than in 

 the Rays. The spout-holes are large, and close behind the eyes. 

 Teeth transversely elliptical, with a cross roll, which is blunt or 

 sharp, or divided into poiuts. Belly-fins simple. The tail is thin, 

 often much pointed and whip-like, without lateral cuticular keels : 

 it is naked, or bears one or more long spines with barbs; it has no 

 fin, whether it be a high or low, ledge-like fin. Skin smooth, or set 

 with tubercles or prickles. Such spines as precede the breast-fins 

 of the male Rays, are not extant here. — Trigonina. 



Trigon, Cuv. Reg. An. 2 ed. ii. 399. 



Trigones, Mull. §• Henle, Mag. Nat. Hist. ii. 91, 1838. Phgiost, 



156. 

 Trigoniuae, p., Swains. Cab. Cycl. ii. 319. 



A. The tail without a spine. — Urogymni. 



Trvgons (§ 2), Mull. S,- Henle. 



Anacanthi, Mull. §• Henle, Mag. Nat. Hist. ii. 90, 1838. Plagiosl. 



156. 

 Anacauthis, " Ehrenb." Cuv. Reg. An. 2 ed. ii. 400. 

 Auacauthus, Swains. Cab. Cycl. ii. 319. 



1. UROGYMNUS. 



Teeth flat. Tail without a rayed fin, with a hem-like, naked, 

 cuticular undcr-rin, or entirely naked. 



Anacanthus, Ehrenb. Midi, fy Henle, Plug. 156. Swains. Cab. 



Cycl. ii. 314. (not Gray). 

 Anacanthus and Urogymnus, Miill. V Henle, Mag. Nat. Hist. ii. 



90, 1838. 



