020 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



' Squalm hodm Saverio Macri, Mem. della R. Ac. Sci. Napoli, I, 1819, p. 55, pi. i, 

 fi^. 1; pi. 11, fig. 2; Naplen. 



Squalus elephm Lk Sueur, Journ. Ac. Nat. S(u. Phila., II, 1821, p. 343; New- 

 Jersey. 



Sijualm a'taceu.^ Gronow, Cat. Fish, 1854, p. (>; Norway. 



Sqnahts vaMeighamiH Coucn, Trans. Linn. S..c., XIV, 1S25, p. 91; Cornwall (a || 

 monstrosity). 



.{(■(uiihlns hldini'illn C'U'iihho, Plagiostom., I, LSOCi, p. 21. 



I'ohijH-osopvs „>nnT CovcH, Hist. Brit. Fishes, 18(11, p. 67; Fnglaml. 



Ilciul small: snout blunt; eyes small; teeth in (3 or 7 rows in each I, 

 jaw, about 200 in each row. Gill-nikers slender, long and close set,t| 

 rescml)ling whalebone. Body rugose, the skin very rough with small 1, 

 spines. First dorsal large, triangular, over the space between pecto-i 

 rals and ventrals; second dorsal nuich smaller, rather hirger than anal;l 

 pectorals long; tail large. Largest of the sharks, reaching a length of .| 

 nearly 40 feet. (Jordan and P^an-mann.) ^ ' 



Found in Arctic seas and occasionally oft' the coast of Japan. It isi 

 figured by Dr. Matsubara in the colored plates of The Principal i 

 Acpiatic Animals of Japan, under the name of " Ubazame." No speci-i 

 mens were seen by us in Japan. . ' 



{maximus, greatest. ) 



Family Xll. RHINEODONTID.E. 



WHALF SHARKS. , 



Very large sharks, formed much as in Cetorldnm^ the caudal lunate, 

 with w.ell-developed lower lobe and a keel on each side of the tail. 

 Origin of first dorsal in advance of ventrals; second dorsal small, 

 opposite anal; no spines, no nictitating membrane, snout broad and 

 flat; eyes very small; spiracles very small, mouth and nostril nean 

 extremity of snout. Teeth conical, or with a heel at base, very small 

 and niunerous. Gill-openings wide, the last one above the base ol 

 the pectorals. Species very few, mostly in the Pacific. 



22. RHINEODON Smith. 



Ti/ttH/WoH Andrew Smith, Illustr. S. Afr. Fishes, 1837 {typicus). 

 Micrhtodus GiTuh, Proc. Ac. Nat. Sci. Pnila., 1865, p. 177 {pundatus). 

 Rhinodon Gunther, revised spelling {typicus). 



Teeth conical, very small. Characters otherwise included above. 

 {piy, snout; odovc;.^ tooth.) 



24. RHINEODON TYPICUS Smith. 



? Rhineodon typicm S.Mnii, Illnstr. S. Afr. Fish, 1837; Cape of Good Hope. 



? Micristodus punctatus Gill, Proc. Ac. Nat. Sci. Phila., 1865, p. 177; ihiU 



California. 

 Rhinodon pentallneatus Kisuinoiye, Zool. Anzeiger, Nov. 25, 1891, p. 694; Cap< 



Inubo, Janan. 



