Sect. XL] 



ZOOLOGY 



397 



.^ 



i 



4 



r 



1^ 



1 



M* 



w 



n 



> 



if 



^ 



u 



^- 



the 



1 



r«r 



r 



*f 





1„ * 



^■ 



t-. 



(, 



If a turtle {Chelone) be taken, the shell should be 



examined for parasitic barnacles {Chdonobia) and other 

 adhesions. The specimens ought not to be scraped off; 

 but the plate of shell to which they are affixed should be 



taken out, and the whole should be preserved together. 



Whales should be searched for CoroimlfE^ Tiihieinellc^^ 

 &c- : they should be left, ''i they are founds in the skin 

 and blubber of the animal, and the piece with its contents 

 should be plunged in spirits. 



The stomachs and intestines of those fishes and birds 

 which are killed during the voyage should be inspected 

 before they are thrown away ; not only for the purpo.se of 



noting their food, but for the chance of finding undigested 

 shells, &c,, and in .search of Entozoa. The feathers of 

 birds should be examined with a view to ascertain whether 



any parasitic insects, any ova of fish or te 

 seeds of plants, adhere to their plu 





:, or any 



Their crops 



will often be found stored with fruits and seeds, which 

 they disseminate in their flight. 



Particular attention should be paid m the appearai 





ance 



V 



of birds or insects, as well as to the direction whence 



they seem to come, with a view to the elucidation of their 

 migration. 



By placing in the sea clean planks of wood, iLe rate of 

 growth of Teredo navalis, and of the Cirripcdia, together 

 with the ravages made by the former, in a dven time, 

 may be ascertained. Serpulce will probably be found on 

 the board also, and, perhaps, other shells. This experi-- 

 ment should be repeated whenever an opportunity occurs, 

 and in different localities and climates. Some of the 

 planks should be painted, others covered with pitch, 



f 



