426 SPINACID^. 



8 fualus americanus, Gm. L. i. p. 1503 ; Bl. Schn. p. 136. 

 — liche, Lacep. i. p. 270, pi. 10. fig. 3. 



nicseeusis, Risso, Ichth. Nice, p. 43, pi. 4. f. 6. 



iScyinmis lichia, Cuv. Regne An. ; Bomip. Faun. ItaL Peso. ; Milll. ^- 

 'Henle, p. 92 ; At/ass. Poiss. Fuss. iii. tab. F. fig. 7 (teeth) ; Dumeril, 

 Elasmohr. p. 452 ; Bocage Sf Capello, Peix. Plagiost. p. 34. 



nicfeensis, Risso, Fur. Mcrid. iii. p. 130, pi. 2. fig. 4. 



Acanthorhinus americanus, Bhiinv. Faun. Ft: p. 63, pi. 15. fig. 2. 

 Dalatias licliia, Gray, Chondropt. p. 76. 

 Seventeen or nineteen erect teeth* in the lower jaw, with the 

 edges serrated. Scales minute, with a median keel, and terminating 

 in a point. The first dorsal fin is nearer to the root of the pectorals 

 than to that of the ventrals. 



Mediterranean and neighbouring parts of the Atlantic. 

 a, b-c. Adult, half-grown, and young. Mediterranean. Purchased 

 of Mr. Cutter. 



d. Half-grown. Nice. From Dr. Deakiu's Collection. 



e. Stuffed : male, 50 inches long. Madeira. Presented by the Rev. 



E. T. Lowe. 

 /, g. Adult male and young. Madeira. Presented by J. Y. John- 

 son, Esq. 



34. L^MARGUS. 



Lsemargus, sp., Miill. ^ Henle, p. 93. 



Somniosus et Rhinoscymnus, GUI, Proc. Ac. Nat. Sc. PJiilad. 1864, 

 p. 264. 



Fins feebly developed. Two short dorsal fins, without spine, the 

 first at a considerable distance from the ventrals ; no anal fin. Skin 

 uniformly covered with minute tubercles. Mouth transverse; a deep 

 straight groove at each angle of the mouth. Nostrils near the ex- 

 tremity of the snout. The upper teeth small, narrow, conical ; the 

 lower teeth numerous, in several series, the point so much turned 

 aside that the inner margin forms a cutting, non-serrated edge. 

 Jaws feeble. No membrana nictitans. Spiracles of moderate width. 

 Gill-openings narrow. 



Northern Seas. 



1. Laemargus borealis. 



Haa-Skierding, Gunner, Trondh. Selsk. Skr. 1763, ii. p. 330, tab. 10 

 &11. 



Squalus carch arias, Midi. Prodr. Zool. Dan. p. 38. 



microceplialus, Bl. 8cJm. p. 135. 



Somniosus brevipinna, Lesueur, Journ. Ac. Nat. Sc. Philad. i. p. 222 

 (Valenciennes and consequently also Dumi^ril quote pi. 8 as repre- 

 senting this shark ; but this plate belongs to a very different fish, 

 a Carcharias) ; Storer, Report Fish. Massach. p. 189. 



Squalus borealis, Scoresbg, Arct. Reg. i. p. 538, pi. 15. figs. 3 & 4 ; 

 Jen. Man. p. 506. 



* These teeth are oblique, as in " La-margus," in young examples ; norinally 

 they are in a single serits ; but wlien they are near the period of being shed, the 

 new series appears behind the old one. 



