Type Specimens of Plumularia catharina, Johnston. 3 
edition of his British Zoophytes appeared, “Dr G. Johnston, of Berwick, 
most kindly presented to the [British] Museum the whole of his Collection, 
which he used in the preparation of his classical work on the subject.” 
According to Gray’s List of the Radiated British Animals in the Musewm,} 
published in the succeeding year, Johnston’s collection contained five 
specimens, type and co-types, of “ Aglaophenia” catharina, all from 
Berwick Bay. 
These—dry specimens mounted neatly on small plates of mica, or loose 
Fie. 1. 
Portion of hydro- 
Fie, 2. ) Inne, By 
clade from one of : 
Johnston’s specimens Lateral aspect of hydro- Anterior aspect of 
of Plumularia catha- theca of Plumularia catha- hydrotheca of Plumularia 
rina. x 50. rind. x 88. catharina, x 88. 
in paper packets—I have examined, by favour of the authorities at the 
British Museum (Natural History), and the examination confirms the 
observations of Segerstedt and his followers (see Fig. 1). Plumularia catharina 
is furnished not only with a single pedunculated lateral sarcotheca on each 
side of the hydrotheca, but, in addition, bears a smaller, sessile supplementary 
individual on each side, set almost in the angle between the internode and the 
“peduncle ” of the lateral sarcotheca. The main lateral sarcotheca falls short 
of the level of the rim of the hydrotheca; the supplementary individual is 
scarcely longer than the process upon which the main individual is set. 
But the proportions can be better studied in a fresh specimen (see Figs. 
2 and 3). 
1 Gray, List of the Specimens of British Animals in the Collection of the Brotish Museum, 
Part i., “‘Centroniz or Radiated Animals,” London, 1848, p. 81. 
