354 
theless they very well accentuate the biogeographical characters of 
the regions, as is evident from the above remarks. 
It is interesting to see how the occurrence, when taken to- 
gether with the phylogenetic relations, seems to indicate that the 
cirriped centre evidently is situated in the Indomalayisian-Eastaustral- 
ian waters; here it seems, as if also to-day the proliferation of 
new species and genera is most lively, and in these regions the 
most ancient forms moreover have endured up till our day. Thorough 
studies regarding the geography of cirripeds should therefore not 
be omitted; in this respect Dr. Mortensen’s collections have given 
us a more than usually good proof. 
During the printing of the present paper an important treatise 
„Cirripeden-Studien. Zur Kenntnis der Biologie, Anatomie und 
Systematik dieser Gruppe" by C. A. Nilsson-Cantell was is- 
sued in Zoologiska Bidrag från Uppsala, Bd. VII. From a quite dif- 
ferent basis Nilsson-Cantell, starting with the mouth parts, 
arrives at results concerning the relations of the different cirripeds, 
which remarkably well agree with the present results, although he 
on this base tends to a splitting up of the groups in small „fam¬ 
ilies". He thus f. inst. maintains the I blid ae, and splits up Le- 
padidae of the present paper in Lepadidae emend. {Lepas, 
Conchoderma, Alepas ), Oxynaspidae (Oxynaspis), P o e c i 1 a s m a- 
tidae ( Poecilasma, Megalasma, Octolasmis ), and Heteralepadi- 
dae (Heteralepas) ; although these groups fairly well coincide with 
the diverging phylogenetic branches arrived at in the present study 
(comp. fig. 1, pag. 2—), I do not think the differences of an im¬ 
portance justifying the groups as families, but in most cases at 
best as subfamilies. On the other hånd, his merging together 
Calantica, Smilium, and Scalpellum into the one genus Scalpellum, 
although he maintains them as subgeneric groups, tends to obscure 
the results arrived at in later papers, especially of Pilsbry, and 
remarkably contrasts with his tendency to establish families on 
