600 ORDER CHONDROPTERYGII. 



With teeth formed like an isosceles triangle, pointed 

 in both jaws ; particularly to be recognized by the 

 superior lobe of its tail, as long as the whole body. 

 Its second dorsal and anal are, on the contrary, 

 extremely small \ 



Sq. glaucus, L., Bl. 86. (the blue shark). With 

 slender body, of a slate-coloured blue above, pectorals 

 very long, and very pointed ; the upper teeth in a 

 curvilinear triangle, bent towards the outside ; the 

 lower straighter ; all dentated 2 . 



Lamna 3 , Cuv. {Lamies, or Touilles, Fr.) 



Do not differ from the sharks but in their pyramidal 

 muzzle, under the base of which are the nostrils, and 

 because the holes of their gills are all in front of the 

 pectorals. 



That which is known in our seas. 



Sq. cornubicus 4 , Schn., Lac. I. ii. 3. {Le nez, French). 



1 It is on this last character that Rafmesque has founded his 

 genus Alopias. 



2 Add the Sq. ustus, Dura. (Sq. carcharia minor, Forsk.) Lac. 

 I. viii. 1. Requin a nageoires noires, Quoy. and Gaym. Zool. de 

 Freyc. pi. xliii. f. 1. The Sq. glauque, Lac* I. ix. 1, which is dif- 

 ferent from that of Bl. The Sq. ciliaris, Schn. pi., xxxi. in which 

 the cilia? only betoken extreme youth. The Palasorrah, and the 

 Sorrahowah, Russ. XIV. and XV. and a considerable number of 

 new species which we shall describe in our history of fishes. 



3 Lamna is one of the Greek names of Lamie : I could not employ 

 the term Lamia, which has been applied by Fabricius to a genus of 

 insects. 



1 The Lamia Rondelet, 399. the Carcharias, Aldrov. 383 and 



