175 
Specimen 18633G; material as above; fixed in corrosive 
sublmate and acetic acid solution (for formula see specimen 
18612C), 24 hours ; 30 per cent. alcohol, 3 hours ; 50 per cent. 
alcohol, 24 hours ; finally 70 per cent. alcohol. 
Specimen 18633H; material as above; fixed in absolute 
alcohol, 24 hours, and transferred to 70 per cent. alcohol. 
Specimen 186551; October 26th, 1904; Cape St. Blaize, 
N.W., 6 miles ; 35 fathoms ; bottom, mud ; procured by large 
trawl, and hauled up off Cape St. Blaize, N.N.W., 6 miles ; 35 
fathoms ; bottom, mud ; fixed in freshly-made Perenyi’s fluid, 
6 hours ; washed in 70 per cent. alcohol, 24 hours, and trans- 
ferred to 70 per cent. alcohol. 
Specimen 18655] ; material as above ; fixed in strong alco- 
hol (absolute alcohol which had been previously used for fixing 
specimens), 24 hours, and transferred to 70 per cent. alcohol. 
Specimen 18655K ; material as above ; fixed in Flemming’s 
fluid which had been previously used, 24 hours ; washed in 
several changes of water, 24 hours; 30 per cent. alcohol. 6 
hours ; 50 per cent. alcohol, 6 hours, and transferred finally 
to 70 per cent. alcohol. 
Specimen 186551 ; material as above ; fixed in freshly-made 
Flemming’s fluid (see notes to specimen 18633D), 24 hours ; 
several changes of water, 24 hours; 30 per cent. alcohol, 6 
hours ; 50 per cent. alcohol, 6 hours ; finally into 70 per cent. 
alcohol. 
Specimen 18663; October 28th, 1904; Cape St. Blaize, 
W.N.W., 5 miles; 31 fathoms; bottom, mud; procured by 
large trawl, and hauled up off Cape St. Blaize, N.W. by N., 
5% miles ; fixed in absolute alcohol 24 hours; and transferred 
tO. 7G per cent, alcohol. » 
Tubarvum.—The finest piece of Cephalodiscus gilchristi sent 
to the Natural History Museum, London, is that of which a 
photographic reproduction is given in plate 1. It is the speci- 
men marked 18551 in the preceding list of material. It 
measures roughly 190mm. by 110 mm., and is of a reddish 
brown tinge. This piece was sent in a 74 per cent. solution 
of formalin in a tinned iron box, and the fluid on arrival was 
turbid and red, owing to the rusting of the iron. The rusty 
tinge of the specimen has diminished since it was placed in 
alcohol, but it has not disappeared. The colour of other speci- 
mens fixed in formalin and transferred to alcohol, and of those 
fixed in alcohol, is pale brown. 
Specimen 18551 consists of an attached base and branches. 
The base, shown in the left-hand lower corner of the plate, 
measures 60 by 45 mm. across. There is no indication of the 
object to which the colony was attached ; the base has come 
