98 Mr. W. L. Distant's Geograplticctl Distribution 



wanderers. The liawk's-bill turtle {Chelonia imhricata), 

 so common in the American seas, has been taken in the 

 Severn, and the leather tortoise ( C. coriacea) on the coast 

 of Cornwall.* On the shores of the Hebrides have been 

 collected seeds of Mimosa scandens, Dolichos urens, 

 Guilandina bondue, and several other plants of Jamaica, 

 Cuba and the neighbouring continent.f Maury mentions 

 the instance in one year of great numbers of bonita and 

 alhercore, following the Gulf Stream, haying entered the 

 English Channel and alarmed the fishermen of Cornwall 

 and Devon by the havoc which they created among the 

 pilchards there. | This extension of the Gulf Stream to 

 our shores in certain years rests on undeniable authority. 

 Sir Edward Sabine drew attention to the mildness of the 

 winter of 1845-46, which was remarkable for its mild- 

 ness, its heavy rains and floods, and unusual prevalence 

 of its westerly gales, in which it resembled the winter of 

 1821-22, when the temperature of the sea in the Bay of 

 Biscay was found to be several degrees warmer than usual. 

 The same .thing was remarked by Dr. Franklin in the 

 same spot in November, 1776.§ It is a somewhat inte- 

 resting coincidence that, with our present winter of con- 

 tinuous rains, floods and westerly winds and gales, about 

 the time that D. Archippus reached our shores, some 

 other remarkable visitors have been recorded. " Pyra- 

 meis virginiensis,^'' another American butterfly, at South 

 Devon in September. || Flying fish {^Exoccetus evolans) 

 at the mouth of the Bristol Channel in August,^ and the 

 bonito {Scomber pelamys^ at Plymouth in September.** 



D. Archippus was recorded from the Azores by Mr. 

 Godman. He met with two specimens of the insect 

 there, though he did not capture either himself. One was 

 taken at Flores in 1864, the other at Fayal in the same 

 year. Both were females. Mr. Godman did not con- 

 sider the insect as established in the Azores, though as he 

 states "the fact of its having been obtained from two 

 islands so widely separated is a curious coincidence." 



* Prin. Geology, vol. ii. p. 369. 



f Humboldt, Ter. Narr., Bohn's Eng. ed. vol. i. p. 22. See also Pen- 

 nant's Voyage to the Hebrides. 

 X Phys. Geo. of Sea, p. 28. 



§ Lon., Ed. and Dub. Phil. Mag. vol. xxviii. p. .317. 

 II Entomologist, vol. ix. p. 255. 

 ■ \ Zoologist, vol. xi. p. 5128. 

 ** lb. 3rd Ser. vol. i. p. 27. 



