412 
BaLLEtIN OF THE UNITED STATES FISH COMMISSION. 
who had written on the subject, had gone hopelessly astray in the interpretation of his 
sections, and that his account of the process of budding in Salpa is of no more value] ) 
than those given by earlier writers. ) j 
T am pleased to learn from his new memoir on Pyrosoma that Seeliger now holds’!' ^ 
the view which I have advocated, as to the essential similarity between the Salpa-^|» 
stolon and that of Pyrosoma, but I am surprised to find that the only reference to\l 
my work on the subject is the statement that I have “ emphasized ” this resemblance j 
“ Die Umbildung der einzelnen Segmente des Stole (of Pyrosoma) zu einer vollstiindigeu Pyrosoma" 
verlauft, wie schon Brooks betonea kounte, sehr abulich mit den Vorgangen in der Salpen eutwick- ■ 
Inug.” (Page 613.) j 
It seems to me that this is a very inadequate recognition of the fact that I pointed 
out the resemblance in detail, in contradiction of Seeliger’s own statement of the i 
case, and in opposition to all other published accounts. | 
During the last year I have been studying the Salpae which were collected by the i' 
Albatross, a>n.d those collected by Professor Libbey on the Grampus, and as these i> 
collections furnish material for the comparative study of the process of budding, I 
have been able to amplify and complete my work on the subject, and to illustrate it || 
by comparisons between different species. I am now preparing the illustrations for a 
memoir on the budding of Salpa, which will be ready for publication this fall. Two ^ 
species, collected by the Grampus, are peculiarly favorable for studying the minute ■ 
details of the process. One of them, which was brought up on the thermometer tubes ij 
of the Grampus, is very similar to if not identical with 8. pinnata of the Mediterranean. * 
It is not a true Salpa, as it differs from the ordinary species of this genus in many | 
structural features. It is especially valuable for the study of the process of budding, '! 
as the Salpse gradually increase in size from the base to the tip of the stolon, and it 
is therefore peculiarly valuable for studying the histology of the process of budding, ; f 
and for tracing the development of the various organs. 
A second species, also collected by the Grampus {8. clotJio), is peculiarly favorable 
for studying the anatomy of the chain, since the secondary complications which are i 
brought about by crowding are more easily intelligible than in any other species I 1 
have studied. This is due to the fact that the young Salpse attain to a larger size and 
to more perfect development before crowding takes place than they do in other species. I 
The study of these two species and of Seeliger's beautiful figures of Pyrosoma { 
show that the resemblance between S|tlj.>a and Pyrosoma is even more perfect and il 
complete than I had supposed, as it extends to all the details of structure. 
Doliolum, n. sp. — Great quantities of young specimens of a species of Doliolum j 
in the stage with a ventral stolon. 
Rhizophysa. — 5 specimens of a Bhizophysa which is probably E. gracilis Fewkes". 
SiPHONOPHOE^. — A number of specimens of Abyles, Dipliyes, and fragments of j 
other Siphonophores. 
Pteropoda. — 10 specimens of Olio {Cresis) virgula; 150 young specimens of the , 
same; 16 of Cavolina tridentata, 1 of Cymbuliopsis calceola. 
Heteropoda. — 200 specimens of Atlanta ; 3 of FiroUdia desmaresti ; 1 of Cari- 
naria cymbium with shell; 8 larvaj with -coiled shells, i) 0 ssibly FirolidialdiTYdd. 
Medusae. — Pelagia cyanella ; Margelis, sp. • 
Ctenophorae. — Idyopsis ; Beroe, young. 
About 30 young pelagic fishes. 
