426 SPINACIDJE. 



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



liche, Lacep. i. p. 279, pi. 10. fig. 8. 



nicaecnsis, llisso, Icldh. Nice, p. 4-3, pi. 4. f. 6. 



Scjmuus licliia, Cuv. lii-f/ne An. ; lionap. Faun. Ital. Peso. ; Milll. ^ 

 Hmle, p. 92 ; Ayass. Poiss. Foss. iii. tab. F. fig. 7 (teeth) ; Ihimeril, 

 Elasmobr. p. 4^'J2 ; Bocaye ^ Capdlo, Peix. Pluyiost. p. 34. 



nicseensis, Risso, Eur. Mcrid. iii. p. 13(), pi. 2. fig. 4. 



Acanthorhiuus americanus, Bluinv. Faun. Ft: p. 03, pi. 15. fig. 2. 

 Dalatia.s lichia. Gray, Chondropt. p. 75. 

 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-groAvn. Nice. From Dr. Dcakin's Collection, 



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



R. T. Lowe. 

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

 son, Esq. 



34. L^MARGUS. 



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



Somniosus et Rliinoscymnus. Gill, Proc. Ac. Nat. Sc, Philad. 1804, 

 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 mciubrana nictitans. Spiracles of moderate width. 

 Gill-openings narrow. 



Northern Seas. 



1. Laemargus horealis. 



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

 & 11. 



Sqiialus carcharias, Midi. Prodr. Zool. Dan. p. 38. 



microcephalus, Bl. Schn. p. 135. 



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

 (Valenciennes and consequently also Dumeril quote pi. 8 as repre- 

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

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



Squalus borealis, Scorcsby, Arct. Rey. i. p. 538, pi. 15. figs. 3 & 4 ; 

 Jen. Man. p. 500. 



* Those t«eth are oblique, as in " L.TmargHs," in young examples ; normally 

 they are in a single scritH ; but when they are near the period of being shed, the 

 new scries appears behind the old one. 



