SYNOPSIS. 413 



Sp. 215.-4. latirostris. Broad-nosed Sturgeon. Snout broad ; 



keels of the dorsal plates but slightly elevated ; cirri placed 



nearer to the tip of the snout than to the mouth. — PameU, 



Trans. Roy. Soc. Edin. xiv. pi. 4 ; Yarr. Brit. Fish., ii. 



p. 479. 



Fam. XXVII. Chimceridce. Fam. of Chi^ncerce. Branchice 



pectinated, only partially free ; vomer alone representing the vpper 



juw, the jaws armed with plates instead of teeth. 



Gen. civ. Chimera. Body elongated, without osseous 

 plates ; dorsals two, the first very high, second low and con- 

 tinued to the tail, the latter attenuated and ending in a naked 

 filament. 



Sp. 216". C. monstrosa. Northern Chimsera. Eyes large, a 

 fleshy process between them bent forwards, and termi- 

 nating in a cluster of small spines : pectorals large and tri- 

 angular, anal rather small : colour different shades of rich 

 brown on a shining white ground, with various rich reflec- 

 tions. — Linn., Penn. Brit. Zool., iii. p. 159 ; Don. Brit. 

 Fish., pi. Ill ; Yarr. Brit. Fish., ii. p. 483. Rabbit fish, 

 Fkm. Brit. An., p. 172. 



SECOND division. CARTILAGINOUS FISHES WITH 

 FIXED GILLS. 



Fam. XXVIII. Squalidce. Fam. of Sharks. Jaws repre- 

 sented by the palatine and portmandular bones; snout produced 

 beyond the mouth, which (ejccept in one instance) is placed be- 

 neath ; body ehyiigated ; tail thick and muscular; branchial open- 

 ings ill the sides of the neck ; pectorals of moderate size ; eyes 

 lateral. 



Gen. CV, Scyllium. Snout rather short and obtuse ; nos- 

 trils near the mouth, with a groove-like prolongation to the 

 edge of the lips ; branchial openings five ; teeth small, triangu- 

 lar, with lateral denticles at the base : dorsals two, the first 

 never in advance of the ventrals ; caudal truncated at the ex- 

 tremity, not forked. 



Sp. 217. S. canicula. Small-spotted Dog-fish. Mouth of a 



