UNIVERSITY OF CALIFORNIA PUBLICATIONS 
ZOOLOGY 
Vol. 2, No. 3, pp. 51-112, Pls. 2-3. January 31, 1905 
CONTRIBUTIONS FROM THE LABORATORY 
OF THE 
MARINE BIOLOGICAL ASSOCIATION OF SAN DIEGO. 
wy 
THE PELAGIC TUNICATA OF THE SAN 
DIEGO REGION, EXCEPTING 
THE LARVACEA. 
BY 
Wo. E. RITTER. 
In accordance with the general plan of the series of faunistic 
papers of which the present is one, the object has been kept con- 
stantly in view not merely of describing the new pelagic tuni- 
cates occurring in the area and of reporting the presence of such 
already familiar ones as have thus far been found; but of fur- 
nishing a ground work, as well designed and securely constructed 
as possible, for future investigations into the general biology of 
this group of animals. 
Diagnoses are given of all the species thus far observed—in 
the Thaliacea covering each of the different generations; and 
as far as possible these have been written from the living animals. 
Furthermore, all the forms actually observed in any numbers 
are figured. Everyone, however, who has had experience with 
these creatures is aware of the impossibility of making drawings 
of them that are at best more than crude outlines; and that to 
accomplish this the carcasses, always at the best badly out of 
shape, must be resorted to for many points. Lateral views are 
shown in every ease, partly because it seemed that on the whole 
these are the most useful as aids to identification, and partly 
because most of the published figures of the same species present 
