NOTES ON OiJECTOLOBLS OK OKOSSORIIINUS, A GENUS 



OF SHARKS. 



By Theodore Gill, LL. 1 ). 



In 1834, Bonaparte, iu the seventh faseicuhis of his •■I'auiia Italica" 

 and iu the chapter on l^cj/UiKni caiiicula, proposed to divide the genus 

 ScylUuin into three genera. Orecfolohus, ScyJlium and Pristiurns. The 

 genus Oreetolohus was defined in the following terms: 



Xiir Orivlolohus, >.''ob. (le cni specie sono tutte esotiche) ; 11 muso o bievM;, la Ixx'ca 

 pros.siiua air estreinita tli quelle; 11 luarglne ilelle uaricl e fornlto all' esteruo d' una 

 \ alvula assai Inuga, rlvolta all' iiulletro; le aperture brauchlali sono iilcciole, le due 

 posteriori dell' uno e dell' altro lato vlciue fra loro e quasi confuse In una; la i)lnua 

 anale e coUocata dietro la seconda dorsale. Questa dlvislone, clie trovasi gia accen- 

 nata uelle opere del Cuvler e del lilainvllle comx)rende lo Squulus harbattis, Guiel. 

 (2)iinct(tti(s, Scbueid-), lo S(])uili.is fasciaius. Pdocb (iigrinus e longicandiis, Gmel. ) e lo 

 S<iii((lii.s }<ih((tiis, 8cbnei<l. 



The species thus included are by no means congeneric, but belong to 

 two widely distinct genera. IJoth genera in 18.'>7 were distinguished 

 by ^Midler and Ilenlc in the same ])aper and named Stcf/o.stoDia and 

 Cro.ssorhinu.s. 



The Squal ua fa.sciati(s was i-egarded as typical of tlie genus SiqiostoiHa 

 and named S. fasviatum. 



The Squalus barhatiis and ;S', lubatus are generally regarded as con- 

 specitic, and were united by Miiller and Henle under the name Crosso- 

 rhinus harhatus. 



The i^qnalu.s ''-punctains^ Schneid.," identiiied by Bonaparte with 8. 

 barbatus, is now considered to be tlie same as Giiu/lymostoiiui cirratnm. 



It is obvious that one or tlie otlier of the later names must give i)]ace 

 to the earlier Orcc.tolobns. The applicability was comiilicated, however, 

 by Bonaparte himself, who later used Orectolobus instead of Chiloscyl- 

 liiDii. For this usage there a[)pears to be no justification. Bona])arte\s 

 action, nevertheless, did not vitiate his previous work, and the name 

 Orectolobus had best be revived for the one later called Crossorhinus, 

 whose synonymy will then be as follows: 



Proceediiig.s of tlie ruitt-d Siale.s National Museiiiu, \ol. XVIIl— Xn. lOiiT. 



