330 NATURAL HISTORY OF THE BERMUDAS. 



iron bars ; and, as every hogshead and barrel have holes 

 bored at each end, they carry away no small quantum of 

 sugar in the year. The honey is of good quality, and 

 sells at the rate of two shillings per quart bottle. 



MAMMALIA. 



Non-resident, and supposed to be Migratory. 



Vespertilio pruinosus. — Hoary Bat of North America. 

 Vespertilio noctivagans. — Silver-haired Bat. 



Resident. 



Mus musculus. — Common Mouse. 



Mus decumanus. — Common Brown or Norway Rat. 



Mus rattus. — The Black Rat. 



Mus tectorum. — The Tree Rat of Savi. 



Balcena atlanticus. — A Right Whale. 



Physeter macrocephalus. — Sperm, or Spermaceti Whale 



Having for some years past noted in my journal the 

 occasional appearance of Bats in the Bermudas, and being 

 convinced that the visits of these animals are periodical, I 

 place on record the following remarks with the view of 

 showing upon what grounds this opinion has been 

 founded : — 



Bats are not known to breed in these islands, nor are 

 they to be found here during the greater portion of the 

 year. I have noted a solitary instance of one being cap- 

 tured in the month of August, which is my earliest date of 



