Lastly, we had the good fortune to procure a specimen of an animal which appears to form a link between the salpa and Pyrosoma.
In order to move itself, the salpa has recourse to a singular artifice.
salpa, sal′pa, n. a remarkable genus of free-swimming Tunicates.
The stolon, like that in salpa, contains a prolongation of the branchial sack.
Perhaps salpa is the nearest animal, although the transparency of the body is nearly the only character they have in common.
Secondly, a salpa, of the class which lives apart and has fine long fibres projecting from the hinder part of the body.
This most exceptional condition was first seen in the transparent salpa, but it may be witnessed in the young of most genera.
The gill-cavity in salpa is much altered, the gills projecting into it dividing it into two chambers.
In Doliolum the body is barrel-shaped and the gills are less modified than in salpa.