Jordan and Evermann. — Fishes of North America. 51 



front of the pectorals; nioiith moderate, the teeth very small, numerous, 

 conical, without cusps or serratures; no nictitating membrane; spiracles 

 very small, above the corners of the mouth; first dorsal large, midway 

 between pectorals and ventrals; second dorsal and anal small ; caudal lin 

 lunate, the upper lobe considerably the larger; caudal peduncle keeled ; 

 pectorals and ventrals large. Brain very small. A single genus, with 

 probably but one species; the largest of living fishes, pelagic, inhabiting 

 the northern seas. (LamnidzE, part, Giinther, viii, 394, genus Selache.) 



35. CETORHINUS, Blainville. 

 (Basking Sharks.) 



? Te^ronis,* Rafinesque, Carattcri, 11, 1810, {(mgiova). 



Celorhinm, Blainville, Jourii. Plij's., 1816, 2G4, {gimneri = viaximus). 



Selache, Cuviee, Eegne Animal, Ed. i, 129, 1817, {maxinms). 



Polyproxiqius, Couch, Hist. Brit. Fish., I, 67, 1861, {rashlei(jhanus = maximus). 



The characters of the genus are included above, (hy/mr, whale; pivri, a 

 shark (*S(/«fl/ina), from fiivri, a file or rasp, the rough skin of the shark being 

 used for polishing wood and marble.) 



69. CETORHINUS MAXIMUS, (Gunner). 

 (Basking Siiakk; Pf;Li5RiN; Elephant Shark; Bone Shark.) 

 Body rugose, the skin very rough with small spines ; head small ; snout 

 blunt; eyes small ; teeth in 6 or 7 rows in each jaw, about 200 in each row ; 

 first dorsal large, triangular, over the space between pectorals and ventrals ; 

 second dorsal much smaller, rather larger than anal; pectorals long, tail 

 large. Gill rakers slender, long and close set, resembling whalebone 

 (hence the name Bone Shark). Largest of the sharks, reaching a length 

 of nearly 40 feet ; found in the Arctic seas, straying southward to Portugal, 

 Virginia, and California. Occasionally taken by whalers in Monterey Bay. 

 It is in general a rare species, but gregarious in the breeding season, num- 

 bers swimming together on the surface, sluggishly, like logs, (maximus, 

 greatest.) (Ku.) 



Sqndlus maximun. Gunner, Trondhjem Selskabskr., in, 33, 1765, Coast of Norway. 



Selachus maximus, Storer, Fisli. Mass., 229, 1867. 



Selache maxima, Guntiier, Cat., viii, 394, 1870. 



Cetorhinus maximus, Jordan & Gilbert, Synopsis, 31, 1883. 



Squalor (jnunerianus, Blainville, Jour, de Pbys., 1810, 25R, after Guuuer. 



Squalus pdegrinus, Blainville, /. <:, ISlO, 257, Europe. 



Squalus homianus, Blainville, I. c., 1810, 257, after Everard Home. 



Cetorhinus shavianus, Blainville, I. c, 1816, 264, after Sbaw. 



Squalus isodiui, Saverio BIacri, Mum. della R. Ac. Sci. Napoli, 1819, i, 55, pi. 1, fig. 1, aud [il. 2, 



fig. 2, Naples. 

 Siiualtis elephas, Le Sueur, Jour. Ac. Nat. Sci. Phila., ii, 343, 1821, New Jersey. 

 Sqitalus cetaccus, Gronow, Cat. Fishes, 6, 1854, Norway. 



Squalus rashleighanus. Couch, Trans. Linn. Soc, xiv, 91, 1825, Cornwall, (a monstrosity). 

 Acanthias hlainvillei, Capello, Plagiostomos, I, 21, 1866. 

 Polijprosojms macer. Couch, Hist. Brit. Fishes, 1, 67, 1861, England. 



* The description of Telroras is apparently taseu from hearsay, and applies to no known shark. 

 It comes nearest tlie present species, but may bo melange of Isttrua and Ileplranchias. We have 

 tlierefore hesitated to substitute Telroras for Celorhinns. Tetroras anginni is described as liaviug 

 "two dorsals; one anal; four gill oix-niiigs; tail unec[ual, oblique; snout Idunt; teeth rasp like ; 

 a keel on each side of tail; eyes very small: gill openings rather large; length about 6 feet. 

 Called Augiova at Palermo," The name Anciova is now applied at Palermo to Ueplranchius ciiiereus, 

 according to Prof. Dodorlein. 



