2G0 THE NATURAL HISTORY 



The neck is long, tubular, and filiform ; the tail ending in a 

 perpendicular groove. It inhabits the Arctic Seas, and is 

 found frequently adhering to the gills of the cod-fish, and 

 to the luinp-sucker (the Cyclopterus Liparis). Captain 

 Phipps found one of them attached to the gills of the latter 

 fish. The natives of Greenland and Davis's Strait frequently 

 employ it as an article of food. 



The Intestinal Worms, as the Asca rides, Echinorhyncus, 

 Taenia, are frequently discovered in the alimentary canals 

 of the different oceanic inhabitants of the Arctic Seas. 



SIPUNCULUS LENDIX. 



The body of this parasitical animal is cylindrical, with a 

 subterminal aperture. This species, which I only find 

 described by Captain Phipps, was found adhering to the 

 intestines of an Eider duck. The late John Hunter dis- 

 sected it, and informed Captain Phipps that he had seen the 

 same species of animal adhering to the intestines of whales. 



EXPLANATION OF THE ENGRAVING. 



A. A portion of the intestine, with the animals adhering 

 thereto. 



B. One of the animals magnified. 



C. The same cut open, showing the shape of the interior. 



Captain Phipps, in a trawl on the northern side of Spitz- 

 bergen, found two species of the Genus Ascidia?, viz. the 

 Gelatinosa and Rustica. They belong to the Mollusca tribe, 

 having a body which is fixed, roundish, and apparently 

 issuing from a sheath ; the apertures are two, generally 

 placed near to the summit, one below the other. These 

 creatures are more or less gelatinous, and have the power 

 of contracting and dilating themselves at pleasure. 



