GALEUS GLAUCUS. 145 



Galeus. 



Oaleus Valmont, 1768, Diet. hist, nat., 1, p. 371. 



Body comparatively slender, tapering to head and tail. Head depressed, 

 snout elongate. Eyes lateral with nictitating membrane well developed. No 

 spiracles. Nostrils oblique. Mouth inferior, greatly arched, with rudimentary 

 labial folds. Teeth curvilinear triangles, with serrated edges and broad bases. 

 Pectorals large, long in the outer angle, hinder angle short. Dorsals, ventrals 

 and anal small. First dorsal nearer to ventrals than to pectorals, second dorsal 

 opposed to the anal. A pit in front of the caudals above and below. Caudals 

 narrow, pointed; subcaudal lobe prominent. Scales minute, with broad tri- 

 carinate crowns. 



Temperate and tropical seas. 



Galeus glaucus. 

 Plate 3, fig. 1-3. 



Galeus glaucus Rondelet, 1554, Pise, p. 378; 1558, Hist, poiss., p. 296; Gesner, 1558, Aquat., p. 718; 



Aldrovandi, 1613, Pise. & Get., p. 394; Will., 1686, Pise., p. 49; Valmont, 1768, Diet. hist, nat., 



1, p. 371; DuHAMEL, 1777, Traite, 3, seet. 9, p. 298, pi. 19, f. 6. 

 Squalus sp. Artedi, 1738, lehthyologia, Syn., p. 98, Gen., p. 69, no. 13. 

 Squalus glaucus Linne, 1758, Syst., 1, p. 235; 1766, Syst., 1, p. 401; Bloch, 1784, Fische Deutsehl., 3, 



p. 78, pi. 86; Bonnaterre, 1788, Ichth., p. 9, pi. 7, f. 22; Gmelin, 1789, Linn6 Syst., 1, p. 1496; 



Lac6pI:de, 1798, Poissons, 1, p. 213; Schn., 1801, Bloch Ichth., p. 131; Turton, 1806, System, 1, 



p. 916; Risso, 1810, lehth. Nice, p. 26; Jenyns, 1835, Man., p. 499; Bonaparte, 1841, Icon. 



Fauna Ital., Pesoi, pi. 50, f. 2. 

 Blue Shark Brookes, 1763, Nat. Hist., 3, Fishes, p. 30; Pennant, 1769, Zool., 3, p. 84; 1776, Zool., 3, 



p. 95; 1812, Zool. 3, p. 143; Watson, 1778, Philos. trans., 68, p. 789, pi. 12; Couch, 1867, Brit. 



fishes, 1, p. 28, pi. 6. 

 Le Glauque Broussonet, 1780, Mem. Acad, roy., p. 665. 

 Charcharias glaucus Rafinesque, 1810, Indice, p. 45. 

 Carcharias glaucus Cw., 1817, Reg. anim., 2, p. 126; Fleming, 1828, Brit, anim., p. 167; Agassiz, 1835, 



Rech. poiss. foss., 3, pi. F, f. 1, teeth; Yarrell, 1836, Brit, fishes, 2, p. 381; Gay, 1854, Hist. 



Chile, 2, p. 364; Day, 1884, Brit, fishes, 2, p. 289, pi. 152; Gunther, 1910, Sud.see fische, 3, p. 479. 

 Squalus (Carcharinus) glaucus Blainv., 1830, Poiss. Fr., p. 92, pi. 23. 

 Squalus (Carcharinus) caeruleus Blain., ibid., p. 90. 

 Carcharias (Prionodon) glaucus Mijller & Henle, 1841, Plagios., p. 36, pi. 11; Dum^iril, 1865, Elasm., 



p. 353; Bocage & Capello, 1866, Plagios., p. 17; GtJNTH., 1870, Cat. fish. Brit, mus., 8, p. 365; 



Doderlein, 1881, Man. ittiol. Medit., 2, p. 42; Day, 1884, Brit, fishes, 2, p. 289, pi. 152. 

 Carcharias (Prionodon) hirundinaceus Dumeril, 1865, Elasm., p. 354. 

 Carcharinus glaucus Jordan & Gilbert, 1883, Bull. 16, U. S. nat. mus., p. 22. 

 Prionace glauca JoRD. &EvEnu., 1896, Bull. 47, U. S. nat. mus., p. 33, pi. 4, f. 16; 1905, Bull. U. S. fish. 



comm., 23, p. 37, f. 3; Snyder, 1904, Bull. U. S. fish, comm., 22, p. 515; Jordan & Fowler, 1903, 



Proc. U. S. nat. mus., 26, p. 613. 



Body elongate, subfusiform. Head less than one fourth of the total length, 

 snout long, pointed. Nostrils nearer to mouth than to end of snout. Mouth 

 crescent-shaped, with short labial folds hidden in the angles. Teeth large, in 

 29-31 rows, those of each series alternating so as to present a continuous cutting 



