94 University of California Publications. | ZOOLOGY 
named species? I agree with Borgert that the latter is the case. 
Since, consequently, D. gegenbaurti Uljanin is only in part a 
synonym, the canon of nomenclature, ‘‘once a synonym, always 
a synonym,’’ does not apply, and the name may stand for the 
unnamed forms with which Uljanin was dealing. That this 
unnamed oozooid which he had was the same as the ‘‘ Doliolum 
sp.”’ of Gebenbaur, *56, and shown in his Pl. XVI, fig. 15, I have 
little doubt. I am strongly of the opinion, too, that ‘‘Gen. 2B and 
4B”’ of Keferstein und Ehlers, and shown in their Pl. IX, figs. 
5 and 7, and Pl. X, fig. 4, likewise belong to the same species, as 
do also Grobben’s D. denticulatum, shown in his PI. I, figs. 3 
and 4, particularly, and pretty certainly also in fig. 5. As to his 
fig. 7, Pl. II, I am in considerable doubt. 
The species is by no means uncommon off San Diego during 
. 
the summer months, though it has not been taken in ‘‘swarms,”’ 
as has D. tritonis. So far it has not been taken in the fall and 
winter months, unless some of the few old oozooids at present in 
doubt as to species belong here. 
(e) Phorozooid. Probably similar to the gonozooid, with the 
exception of the absence of sexual organs and presence of the 
ventral process, but it is doubtful if fully developed specimens 
of this generation are known. 
(d) Trophozooid. Not known with certainty in the fully 
grown state, but probably shown by Grobben, ’82, as he himself 
believed, in his Pl. IT, fig. 8. As I have not seen specimens of this 
generation except as very young buds still attached to the dorsal 
process of the oozooid, I do not give a diagnosis and figure of 
it, but refer to the above mentioned figure by Grobben, assigned 
by him to D. denticulatum. The form deseribed and figured by 
this author apparently differs from the trophozooid assigned by 
me to D. tritonis, fig 26, in the following particulars: It is some- 
what broader in proportion to its length, particularly at the 
anterior end; it has a somewhat less number of branchial stig- 
mata, the maximum reported for it being eighteen (Gegenbauer, 
56), while the tritonis zooid has at least twenty-three; it has 
test processes at the posterior end as well as at the anterior, 
where alone, so far as we know, one is present in tritonis; and 
these processes are more filiform than in tritonis. 
