40 THE PLAGIOSTOMIA. 



Basking shark Pennant, 1769, Zool., 3, p. 78; 1776, ibid., 3, p. 101, pi. 13; Home, 1810, Philos. trans., 



p. 206; Low, 1813, Fauna Oread., p. 173; Yarrell, 1836, Brit, fishes, 2, p. 396; Couch, 1867, 



Brit, fishes, 1, p. 60, pi. 14. 

 Lc (res-grand Broussonet, 1780, Mem. Acad, roy., p. 669; Daubenton, 1787, Encycl. meth., 3, p. 96; 



Lacepede, 1798, Poissons, 1, p. 209. 

 Sqttalus pelegrinus Blainv., 1810, Journ. de phys. p. 18, pi. 2, f. 2; Ann. mus., 18, p. 88, pi. 6. 

 Cetorhinus gunneri Blainv., 1816, Bull. Soc. philom., p. 121. 



Cetorhinus homianus Blainv., 1810. Journ. de phys., p. 19, extra, pi. 2, f . 1, 1816, Bull. Soc. philom., p. 121. 

 Cctorhimis shat'ianus Blainv., 1816, Bull. Soc. philom., p. 121. 

 Selache maxima Cuv., 1817, Reg. anim., 2, p. 129; F. Faber, 1829, Fische Islands, p. 20; Richardson, 



1836, Faun. Bor. Amer., 3, p. 29; Parnei.l, 1838, Mem. Wern. soc, 7, p. 418; Muller & Henle, 



1841, Plagios., p. 71; Nilsson, 1855, Fisk. Skand.; Thompson, 1856, Nat. hist. Ireland, 4, p. 253; 



Domeril, 1865, Elasm., p. 413; Bocage & Capello, 1866, Plagios., p. 14; Capello, 1869, Jor. 



Acad. sci. Lisboa, 7, p. 140; Gonth., 1870, Cat. fishes Brit, mus., 8, p. 394; Pavesi, 1874, Ann. Mus. 



civ. Genoa, 6, p. 36; 1878, ibid., 12, pi. fig.; Lutken, 1880, Vid. medd. nat. forh., p. 62; Doderlein, 



1881, Man. ittiol. Medit., 2, p. 70; Day, 1884, Brit, fishes, 2, p. 303, pi. 158, f. 1. 

 Squalus isodus Macri, 1819, Atti Accad. sci. Napoli, 1, p. 55, pi. 1, f . 1, pi. 2. 

 Squalus rostralus Macri, 1819, ibid., p. 76, pi. 1, fig. 2. 

 Squalus elephas Le Sueur, 1822, Journ. Acad. nat. sci. Phil., 2, p. 350, pi.; Storer, 1839, Report fishes, 



p. 407. 

 Squalus rashleighanus Couch, 1825, Trans. Linn, soc, 14, p. 91 ; 1838, Cornish Fauna, 1, p. 51. 

 Squalus cetaceus Gray, 1854, Gron. syst., p. 6. 

 Polyprosopus rashleighanus Gill, 1861, Ann. N. Y. lye, 7, p. 398; Couch, 1867, Brit, fishes, 1, p. 67, 



pi. 14, f. 1. 

 Polyprosopus macer Couch, 1867, Brit, fishes, 1, p. 68, fig. 

 Cetorhinus blainvillii Capello, 1869, Jor. Acad. sci. Lisboa, 7, p. 133. 

 Cetorhinus rostratus Cornish, 1870, Zool., 2, no. 59. 

 Selache rostrata Pavesi, 1874, Ann. Mus. civ. Genoa, 6, p. 36, pi. 1-3. 

 Cetorhinus maximus Gervais, 1876, C. R. Acad. sci. Paris, 82, pi. 138; Journ. zool., 5; Jordan & 



Gilbert, 1883, Bull. 16, U. S. nat, mus., p. 31; Jord. & Everm., 1896, Bull. 47, U. S. nat. 



mus., p. 51; 1900, ibid., Atlas, pi. 7, f. 23. 



Outlines bearing much resemblance to those of Isurus. Body subfusiform, 

 massive forward, more slender behind the dorsal fin. Snout subcorneal, of 

 moderate length. Eyes small, without a nictitating membrane, above the 

 forward end of the mouth. Spiracle small, behind the eye, above the hinder 

 part of the mouth. Nostrils small, near the sides of the snout and near the 

 mouth. Mouth very large, curved forward. Teeth small, subcorneal, very 

 numerous, a half dozen or more of the series in function at once, smooth edged. 

 Gill openings in front of the pectoral, extending nearly around the neck, the 

 anterior pair being narrowly separated on the back and on the throat. C 1 ill 

 arches bearing strainers, apparently modified teeth or scales, in some respects 

 resembling whalebone, whence the name "Bone Shark." Pectorals medium, 

 pointed, front edge about twice the length of the base and the inner edge to- 

 gether, fin reaching below the middle of the dorsal. Dorsal above the space 

 between the pectorals and the ventrals, nearer to the latter, origin a short 

 distance behind the inner extremities of the former, height less than length of 

 base, fin angled above; hinder angle sharp, not reaching a vertical from the 

 ventrals. Ventrals rather small, below the space between the dorsals, nearer 



X 



