389 



Fam. 2. LAMNIDtE. 



The lirst dorsal opposite to the space between the 

 pectoral and ventral fins, without spine ; an anal fin. 

 No nictitating membrane. Mouth crescent-shaped, 

 inferior ; nostrils not confluent with the mouth. 

 Gill-openings generally wide. Spiracles none, or 

 minute. 



Group A. LAMNINA. 



12. LAMNA. 



Lamna, Ctioier. 



Oxyrhiiia, Agassiz. 



Lanina et Oxyrhina, Midler <^ Henle. 



The first dorsal fin opposite to the space between the pectoral and 

 ventral fins, without spine ; the second and the anal very small. A 

 pit at the root of the caudal, which has the lower lobe much deve- 

 loped. Side of the tail with a keel. No membrana nictitans. 

 Spiracles none*. Mouth wide. Teeth large, lanceolate, not ser- 

 rated, sometimes with additional basal cusps. Gill-openings very 

 wide. 



Temperate and tropical seas. 



1. Lanina cornubica. 



Canis carcharias, Aklrov. De Pise. p. 383. 



Habrand, Ascan. Ic. pi. 31. 



Porbeagle, Burlase, Cornwall, p. 265, pi. 26. fig. 4 ; Penn. Brit. Zool. 



iii. p. 103, or, edit. 1812, iii. p. 152 ; Goodcnotigh, Trans. Linn. Soc. 



iii. p. 80, pi. 15 ; Couch, Fish. Brit. Isl. i. p. 41, pi. 8. 

 Beaumaris Shark, Pmn. Brit. Zool. iii. p. 104, t. 17, or, edit. 1812, iii. 



p. 154, pi. 20. 

 Squalus cornubicus, Gm. L. i. p. 1497 ; Bl. Schn. p. 132 ; Turt. Brit. 



Faun. p. IL") ; Donovan, Brit. Fish. v. p. 108 ; Neill, Werner. Mem. 



i. p. 549; Blainr. Faun. Fr. p. 90, pi. 14. tig. 2; Jent/ns, Man. 



p. 500 ; Wright c)- Ekstr. p. 135, tab. 30. 

 ? .Squalus long-uez, Lacep. i. p. 210, pi. 2. tig. 3. 

 TouiUe-bceuf, Loutre, or Taupe de mer, Duhamel, Pesches, ix. p. 298, 



pi. 20. fig, 4, 



* I have examined fresh specimens of both the European species of from 3 to 

 4 feet in length. In the Porbeagle there was no spiracle ; but a minuto pore- 

 like foramen could be seen on one side of an cxam])lc of L. /^jxillaiuam. Under 

 these circumstances T think it better to class I.amna with tlie genera without 

 1 spiracles. These openings have been used as a family character I 



