LIST OF FISH. 25 



Cuvier (Reg. An.385, 1817, and2ed. 1829) divides these animals 

 in the following manner: — I. Squalus (Linn.), containing 



I. (Les Scyllies). 



II. Les Squales, which are sub-divided as in Schneider, thus: 

 a. without spiracules and without anal-fins. 1. Carcharias. — 2. 

 Larana. b. with spiracules and anal-fins. — 3. Galeus. — 4. Mus- 

 telus. — 5. Notidanus. — 6. Selache. — 7.*Cestraciens. c. with spira- 

 cules, but without anals. — 8. Spinax. — 9. Centrina. — 10. Scymnus. 

 — 11. Zygana. 



III. Squatina. 



IV. Pristis. 



M. Charles Buonaparte (Selachorum Tabula Analytica, 1838, 

 4to.) divides the family Squalid^ in the following manner: — 



1. Squalidse anomalae. — Body depressed. Pectoral-fins very large. 

 — Squatina. 



2. Squalidse vers. — Body elongate, roundish ; pectoral-fins con- 

 gruous. 



* Anal-fins none ; spiracles distinct; nictitant membrane none. 



1. Spinacini. — First dorsal spined ; teeth compressed, sharp-edged. — 

 Acanthias. — Spinax. — Centrina. — Centrophorus. 



2. Scymnini. — Dorsals armless ; teeth triangular, of maxilla, in 

 many series ; of mandibles, in one or two series, and a broad base. 

 Lepidorhinus. — Scymnus. — Laemargus. — Echinorrhinus. 



** Anal distinct ; nictitant membrane none ; spiracles none, or very 



small. 



3. Notidianini. — Dorsal, one. — Heptoranchias. — Notidianus. 



4. Trichoghidini. — Dorsals, two ; first before, second behind the ven- 

 trals and before the anal ; gill-slits very large, all before the pecto- 

 ral ; fins large ; upper caudal-lobe elongate. — Triglochis. 



5. Lamnini. — Dorsals, two; second opposite the small anal; gill- 

 slits very large, all before the pectorals ; tail lunate. — Selache. — 

 Carchavodon. — Oxyrhina. — Lamna. 



6. Alopiadini. — Dorsals, two ; hinder over the pectorals ; upper cau- 

 dal-lobe very long; gill-slits small; teeth simple. — Alopias. — 

 Ehinzodon. 



