3o, EUPROTOIIICRUS. 427 



Scyninus borealis, Flein. Brit. An. p. 100; Yarrell, Brit. Fish. 2iid 



edit. ii. p. 527, or iird edit. ii. p. 524; Nilss. Ukand. Faun. Fisk. 



p. 724. 



glacialis, Fdher, Fisch. Id. p. 2^3. 



yuuueii, lUchurds. Faiin. Bur.-Amer. iii. p. .313. 



Squalus uorweii:iauus, Blainv. Faun. Fr. p. (U. 



Scymnus micropterus, Valenc. Nouv. Ann. Mm. i. 1832, p. 454, pi. 20. 



Lsemargus borealis, Midi. &; Henle, p. 93 ; Gaimard, Voy. Isl. Groenl. 



Poiss. pi. 22 ; Dumeril, Elasmobr. p. 455, pi. 5. lip^s. 1 & 2 (teeth). 

 Leiodou echinatum, Wood, l*roe. Bust. Hoc. Nat. Hist. ii. p. 174. 

 Scymnus brevipiima, Dekay, New York Faun. Fish. p. 361, pi. 61. 



tig. 202 ; Storer, 3Iem. Am. Acad. Lx. 1867, p. 235, pi. 38. lig. 2. 

 microcephalus, Kror/. Danm. Fiik. iii. p. 914; Malmgren, 



(Efvers. Svensk. Vet.-Ak. Fiirhandl. 1864-65, p. 536. 

 Squalus norvegicus, Gronov. Syst. ed. Gray, p. 8. 

 Greenland Shark, Cotwh, Fish. Brit. Isl. i. p. 57, pi. 13. 

 Loemargus brevipinna, Dumeril, I. c. p. 456, pi. 5. figs. 3 & 4. 



From 44 to 52 teeth in one of the scries of the lower jaw. The 

 first dorsal fin midway between the roots of the pectoral and ventral 

 fins ; the second commences opposite to the end of the insertion of 

 the ventral fins. Pectorals small. 



Arctic Seas ; North Atlantic. — -Attains to a length of 25 feet. 



a. Stuffed, 7 feet long. England. Presented by Messrs. .J. and C. 



Grove. 



b. Stuffed, 6 feet long. England. 



c. Jaws of an adult example. 



2. Lsemargus rostratus. 



Scymnus rostratus, Bisso, Fur. Merid. iii. p. 138, fig. 7. 

 Lieniargus rostratus, Canestrini, Mem. Accad. Sc. Torin. xxi. 1865, 

 p. 364, tav. 2. figs. 2-4. 



This species does not appear to have been compared directly with 

 L. borealis ; and therefore its characters cannot be pointed out in au 

 exact manner. The fins, especially tlie pectorals, appear to be more 

 developed. The length of the snout is one-half of the distance of 

 the eye from the second gill-opening. 



Mediterranean. 



35. EUPEOTOMICRUS. 



Lsemargus, sp., Miill. Sc Henle. 



Euprotomicrus, Gill, Proc. Ac. Nut. Sc. Philad. 1864, p. 264. 



Two dorsal fins, without spine ; the first very small, at a short 

 distance from the ventrals ; the second much longer ; no anal fin. 

 Skin uniformly granular. Mouth transverse ; a deep straight groove 

 at each angle of the mouth, in which a labial fold is liiddcn. A'os- 

 trils near to the extremity of the snout, which is not depressed, 

 obtusel}' conical. Upper teeth small, conical ; tlie lower much larger, 

 triangular, slightly oblique, not serrated, in moderate number. Xo 

 membrana nictitans. Spiracles wide ; gill-openings very narrow. 



Indian Ocean. 



