LIST OF FISH. 39 



Scyllium heptagonum, R'dpp. Chondropt. 1, t. 17, f. 1. 

 Scylliorhinus tigrinus, Blainv. Bull. Soc. Phil. 121, 1816. Jour, de 

 Phys. 263, 1816. 



Hab. — Indian Ocean. 



a — c. Stuffed. 



d. Stuffed. Indian Seas. 



e,f. Stuffed. Madras Seas. Presented by T. C. Jerdon, Esq. 



g. Stuffed. India. Presented by T. E. J. Boileau, Esq. 



Fam. 2. SQUALID^. 



Body elongate, subcylindrical, gradually tapering to the tail. 

 Pectoral-fins moderate lateral. Dorsal-fins, one or two ; the first 

 placed between the pectoral and dorsal- fins. 



Squali, (§ 2, 3, and 4), Mull. $■ Henle, Mag. Nat. Hist. ii. 1838. 

 Plagiost. 28. 



Synopsis of Sections and Tribes. 



I. Nictitating membrane distinct; dorsal-fins two; anal distinct. 



a. Spiracles none ; second dorsal over the anal. 



1 . Sqcaliana. — Teeth flat, sharp-edged, smooth, or serrated. 



2. Leptochariana. — Teeth pointed, with lateral denticles. 



b. Spiracles distinct. 



3. Galieana. — Teeth flat, shai"p-edged, smooth, or serrated. 



4. Triakiana. — Teeth pointed, with lateral denticles. 



5. Musteliana. — Teeth pavement-like. 



II. Nictitating membrane none. 

 a. Anal distinct ; dorsal-fins two. 



6. Isurina. — Gill-slits all before the pectorals ; second dorsal 

 opposite the anal. 



7. Odontaspioiana. — Gill-slits all before the pectorals; second 

 dorsal between the ventral and anal. 



8. Alopeciana. — Last gill-slit over the pectoral ; second dorsal 

 opposite the anal. 



E2 



