35. EUPROTOMICRUS. 427 



Scyninus borealis, Flem. Brit. An. p. 16G ; Yarrell, Brit. Fish. 2nd, 



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



p. 724. 



glacialis, Faber,Fisch. Isl.^. 23. 



guimei'i, Itichards. Faun. Bor.-Amer. iii. p. 313. 



Squalus norwegianus, Blainv. Faun. Fr. p. 61. 



Scymnus niicropterus, Valenc. Nouv. Ann. Mns. i. 1832, p. 454, pi. 20. 



Ljemargus borealis, Miill. S; Henle, p. 93 ; Gaimard, Voy. Isl. Groenl. 



Poiss. pi. 22 ; JDutneril, Elasmobr. p. 455, pi. 5. figs. 1 & 2 (teeth). 

 Leiodon echinatura. Wood, I'roc. Bost. Soc. Nat. Hist. ii. p. 174. 

 Scymnus brevipinna, Dekay, New York Faun. Fish. p. 301, pi. 61. 



tig. 202; Storer, Mem. Am. Acad. ix. 1867, p. 235, pi. 38. fig. 2. 

 microceplialus, Kriiy. Damn. Fisk. iii. p. 914; Malmgren, 



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

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

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

 Laemargus brevipinna, Dtaneril, I. c. p. 456, pi. 5. figs. 3 & 4. 



From 44 to 52 teeth in one of the series 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. Lffimargus rostratus. 



Scymnus rostratus, Risso, Eur. Merid. iii. p. 138, fig. 7. 

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

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



This species does not appear to have been compared directly with 

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

 exact manner. The fins, esi^ecially the 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. EUPROTOMICRUS. 



Lajmargus, sp., Miill. i^- Jfenle. 



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



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

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

 Skin uniformlj" granular. Mouth transverse ; a deep straight groove 

 at each angle of the mouth, in which a labial fold is hidden. Nos- 

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

 obtusely conical. Upper teeth small, conical ; the lower much larger, 

 triangular, slightly obliiiue, not serrated, in moderate number. No 

 membrana nic titans. Spiracles wide ; gill-openings very narrow. 



Indian Ocean. 



