LIST 01' FISH. 



Fam. 1. SCYLLTDiE. 



Have spout-holes anil no nictitating membrane, iivc gill-openings 

 which stand either all at equal distances from each other, or the two 

 last are so approximated that the fifth appears within the fourth. 

 The last gill-opening is placed over the root of the breast-fin. All 

 possess a furrow at the corner of the mouth and an upper labial car- 

 tilage. The teeth have a middle point, and from one to four radical 

 toothlets on either side. The breast-fins are, with lew exceptions, 

 broader in proportion to their length than in the rest of the sharks. 

 The anal-fin stands either before, beneath, or behind the second 

 back fin. The tail-fin is extended lengthways, not forked, truncated 

 or rounded at the end, with or without a trace of an under lobe, but 

 provided with a notch more or less deep near the end on the under 

 side. No fish of this species has a caudal- fin. They are all charac- 

 terized by a lively colour or some peculiarity of design in their 

 markings! The gut-valve is spinal. This family seems to contain 

 the egg-laying or spawning sharks. The eggs are more or less like 

 thosi of the rays. 



Squali, § 1. Scyllia, Mull. S>- Henle, Mag. Nat. Hist. ii. 1838. 



Plagiost. 

 Scvllium, Cuv. Reg. An. 2ed. ii. 1817. 

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



263, 1816. 

 Scyllini, Bonap. Selach. Tab. Anal. 14. 1838. 



a. Anal-fin nearer the head than the second dorsal. 



1. SCYLLIUM. 



The first back-fin between the belly-fin and anal : the second be- 

 tween the anal and tail-fin. Spiracles close behind the eyes. The 

 gill-openings are placed all at equal distances from each other, the 

 hindmost pair over the breast-fin. Snout short and blunt ; nostril 

 near the mouth sometimes sending a furrow to the edge of the upper 

 lip. The upper nasal-flap surrounds the nostril in such a manner 

 that for the most part there remains a small round opening on the 

 outer side. The nasal-flaps of both sides are separated from each 

 other by a larger or smaller dilating middle piece, or they pass 

 across into one another. In some, we find in the middle of the ex- 

 ternal surface a rudimentary beard, which at times projects beyond 



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