LIST OF FISH. 81 



Sub-section II. RAIL 



Plagiostomi with flat bodies and spout-holes; gill-slits five before 

 the belly-fins and under the pectorals ; the eyes with an adhering 

 upper eyelid or without an eyelid, with a complete scapular ring and 

 naso-pectoral cartilages. 



Pisces cartilaginei plani et lati, Rag, Sgn. Pise. 23. 



Raia, Linn. 



Les Raies (Raia), Cur. Reg. An. 2 ed. ii. 373. 



Platosomia, Rqfin. Anal. Nat. 93, 1815. 



Raj as, Mull. Abh. Akad. Berl. 1836. Plagiost. 103. 



Raids, Gray, Syn. B.M. 148, 150, 1842.* 



Dumeril (Zoologie Analytique, 101, 1806, 8vo.) divides the Pla- 

 giostomes thus : — 



A. Branchial holes below ; body flat. 



1. Torpedo. — Tail short; body smooth, naked. 



2. Raia. — Tail long, narrow at the base. 



3. Rhinobatus. — Tail long, very thick at the base. 



B. Branchial holes lateral ; body rounded. 



4. Squatina. — With teeth ; pectoral-fins niched. 



5. Squalus. — With teeth ; pectoral-fins entire. 



6. Aodon. — Without teeth. 



Rafinesque (Caratteri Nuovi Gcneri, 1810, 8vo.) proposes and 

 characterizes the following genera of rays (Raia) : — 



1. Leiobatus (Panduratus). — 2. Dipturus (Batis). — 3. Dasyatis 

 (Ujo). = Uroxys (Ugo), Index. 



In his Analyse de la Nature, 1815, he formed the Rays into a 

 family he called Platysomia, containing the following genera: — 

 1. Rhinobatus, Dumeril. — 2. Platopterus = Raia, Linn. — 3. Leio- 

 batus. — 4. Epinotus. — 5. Lgmnea (afterwards changed to Noclius, p. 

 220). — 6. Torpedo, Dumeril. — 7. Dipturus. — 8. Mobula. — Q.Ictcetus. 

 — 10. Cephaleutherus, — 11. Sephenia. — 12. Megalatus. — 13. Dasya- 

 tus. — 14. Uroxys. — 15. Apturus. The names in Italic are new, but 

 he neither gives types nor characters, so that it is impossible to un- 

 derstand for what they are intended. 



