50 



BULLETIN 



UNITED STATES NATIONAL MUSEUM. 



There is plainly considerable difference even here, but the ai)[)r()\i 

 raation is such that in default of finding good characters for I>. major, 

 I am unable to regard it other than as a large individual of i>, delpliis. 



Skull JSo. lG25rt, in the collection of the British Museum. 



Among the skulls ditferiug from the ordinary I), delphis in some re- 

 spects is one in the British Museum, No. IGL'aa, labeled I), longirostris. 

 In this skull the pterygoids are somewhot broader at the free ex- 

 tremity than is usual, and the breadth at the orbits is considerably less. 

 This skull is 4V''"' long, while the breadth at the orbits is but 14^"'. No. 

 574rt. in the Oambridge ]\Iuseum from the Bahamas (see Table, p. 48, No. 

 15), which isoneof the skulls having the least width iit the orbits, meas- 

 ures 17.G'''" at this point, though but 47. 4«"' in total length. I am un- 

 able, however, to discover any other cliaracters by which to sej)arateit 

 from JJ. delpliis, and regard it inadvisable, therefore, to remove it from 

 that species. 



DelpMnus fulvofasciatus Hombron and Jacquinot. 



The type of D.fulrofasciatus, Hombron and Jacquinot, No. ^3025, in 

 the Paris Museum, from HobartTown, Tasmania, differs from the aver- 

 age I). Mphis.^o far as I was able to determine, only in being somewhat 

 broader across the orbits, as is also the case with No. a3071 in the same 

 museum from Tasmania, and labeled D. tasmaniensis. The length of 

 these skulls and the width at the orbits are compared in the following 

 table with the same measurements of a skull also in the Paris Museum, 

 from Algeria, and with No. 20S73 in the U. S. National Museum, from 

 Block Island : 



No. 15, in the table on p. 48, is of about the same proportions as the 

 skull labeled TJ. tasmaniensis, but the locality is unknown ; it may be 

 also from Tasmania. 



We have, however, Professor Flower's statement that he has ex- 

 amined a series of skeletons of (apparently) D. delphis from New Zea 

 land waters and can find no characters by which to distinguish them 

 from D. delphis from the coast of Europe. 



The figure of the exterior of D. fulvofasciatus in the Voyage au Pole sud 



