TUNICARIES. 223 



base in the opposite set. 1 This reunion, in the 

 salpes, is effected by means of eight pedicles, of 

 a nature exactly similar to that of the body. It 

 is perfectly regular, that is to say all the indi- 

 viduals are at the same distance and height, all 

 the heads in one row are turned to the same 

 side, and those of another to the opposite. These 

 rows usually consist of from forty to fifty indivi- 

 duals, and are carried by the waves sometimes 

 in a straight, sometimes in a curved, and some- 

 times in a spiral line. In the sea, during the day, 

 they appear like white ribands, and during the 

 night like ribands of fire, which alternately 

 roll up and unroll, wholly or partially, either 

 from the motion of the water, or from the will of 

 the animals that compose them. They are found 

 in the ocean only at a great distance from land. 

 Professor Eschscholz mentions one, 2 interme- 

 diate between the Salpes and Pyrosomes and a 

 similar one is now in the Hunterian Museum 3 

 which by means of a pedicle appeared to be at- 

 tached to some common body, all of them ar- 

 ranged in rows with the head turned to the same 

 side ; Savigny, whose eye nothing escaped, and 

 the acumen of whose intellect equalled that of 

 his sight, alas now dark, further informs us, that 

 the Salpes adhere to each other only by certain 

 gelatinous protuberances, or as Lamarck sus- 



1 PLATE XI. FIG. 3. Anchinia. 



3 PLATE IV. FIG, 2. 



