1881.] PROF. W. U. FLOWER ON THE ELEPHANT SEAL. 145 



a common dark stripe edged externally with whitish (at least on the 

 fore wing, where the costa is suffused with whitish between the 

 stripe and the apex) extends from the costa of the fore wings to the 

 inner margin of the hind wings at about two thirds of tiie length of 

 the wing ; near the base of the fore wings is a similar stripe, more 

 oblique, and diverging from the other, not reproduced below ; tails 

 of the same shape as in S. brachyura, and edged with darker, as are 

 also the fringes of the wings ; a narrow pinkish line runs down the 

 greater portion of the tail in the male ; the tails in the female are 

 much more broadly edged with darker lor two thirds of their leno-ih ; 

 near the outer stripe of the fore wings runs a row of four small 

 vitreous spots, edged with yellow and black, within which are two 

 smaller detached spots in the female and one in the male ; the 

 vitreous spots are larger, and the yellow edging less distinct in the 

 female than in the male ; hind wings with five similar but smaller 

 spots within the stripe, placed irregularly. Underside similar, but 

 paler; basal stripe of fore wings absent. Body extending for half 

 the length of the hind wings in the male, and for three quarters in 

 the female, tails not included. Antennae with very distant pecti- 

 nations." 



EXPLANATION OF THE PLATES, 

 Plate XII. 



Fig. 1. Satumia iole, p. 144. 



2. arnobia. p. 142. 



3. sciron, p. 143. 



4. Castnia erycina, p. 141, 



Plate XIII. 



Fig. 1. Satumia {Eudanionia) argiphontes, p. 144, 



2. scrgestus, p. 143. 



3. hyperbius, p. 143, 



3. On the Elephant Seal, Macrorhinus leoninus (Linn.). 

 By William Henry Flower, LL.D., F.R.S., P.Z.S., &c. 



[Eeceired January 4, 1881.] 



The Museum of the Royal College of Surgeons of England has 

 lately received from the Falkland Islands a very fine skull of an 

 adult Elephant Seal. As this is a larger specimen than any with 

 which I am acquainted, I have thought that it might interest the 

 Fellows of the Society to see it ; and I have availed myself of the 

 opportunity afforded me by its exhibition to put together some notes 

 regarding certain points in the structure and affinities of an animal 

 which, notwithstanding its former abundance and wide distribution, 

 and its great zoological interest, is still very imperfectly known 

 anatomically, and very poorly represented in collections. 



Puoc. ZooL. Soc— 1881, No. X. 10 



