216 
Other interesting species of Scalpellum represented in the 
collection are: . 
I. Scalpellum (Smilium) scorpio, C. W. Aurivillius; a single 
hermaphrodite (Pl. III fig. 4) with several males attached and 
growing in a sponge. It is labelled ”Ostindien”. 
II. Scalpellum groenlandicum, C. W. Aurivillius; two specimens 
from a Spirula shell taken in lat. 34? S., long. 37? E. 
III. Scalpellum indicum, Hoek; a single broken specimen 
from lat. 32 N. long. 128? 10' E., from a depth of 100 fathoms. 
The specimens of 5. groenlandicum indicate an enormous 
extension of the known range of the species but appear to me to 
agree well with Aurivillius's figures. 
II. Notes on some species of Poecilasma and Dichelaspis. 
The synonymy proposed in the following notes may seem 
extravagant to some students of the Cirripedia; I can only excuse 
it by stating the fact that I have examined large numbers of speci- 
mens in each case, in most cases ;from widely separated localities. 
Poecilasma fissum, Darwin. 
Poecilasma fissa, Darwin, Mon. Cirr. Lepad., p. 109, pl. ii, fig. 4. 
oecilasma vagans, amygdalum and lenticula, C. W. Aurivillius, "Stud. 
t. Cirrip.,” Abh. k. Schwed. Akad. Wiss. 1894, pp. 9—13, pls. i, figs. 
4—12, viii, figs. 10, 14—16, 22, 28. 
Poecilasma. fissum, Hoek, Siboga-Exped., Mon. xxxia (Cirr. Ped.), p- 8. 
This species is a very variable one, especially as regards the 
shape and size of the tergum, the shape of the capitulum and the 
extent of naked membrane, if any .such membrane is visible, at 
the tip of the capitulum. There are also differences as regards 
the armature of the cirri and the exact form of the mouth parts. 
I cannot, however, distinguish the forms referred to in the syno- 
nymy of the species as distinct, for they appear to merge gradually 
into one another. 
There are two sets of specimens in the collection stated to 
have been taken "in Palinuro” but without further data as 
