1072 REPORT—1885. 
14. On the Chemical Composition of the Milk of the Porpoise. 
By Professor Purpir, Ph.D., B.Sc. 
Professor McIntosh haying kindly placed at my disposal a small specimen of 
milk which he extracted from the mamma of a porpoise, I have made an analysis of 
it, the results of which are given below :— 
In 100 parts 
by weight 
Water . hi ; 5 5 ; 5 i BG he 
Fat , . ; : : 4 : . 45-80 
Albuminoids 4 ; . . , Sepedtaed ta IGS) 
Mite Suge ey meet yidter bine Koltiiset ate toy aR 
Mineral Salts : é i : A : 0-57 
The milk was of a yellow colour and thick consistency ; its specific gravity was 
almost identical with that of water. 
The most remarkable point about the chemical composition of the milk as com- 
pared with that of other mammals, is the very high percentage of fat which it 
contains, a constituent which the habit of life of the cetacean no doubt requires in 
larger proportion. The quantity of material at my disposal being very small, the 
results of the analysis cannot pretend to great accuracy, and it must be noted that 
though the analysis represents the milk as containing a small quantity of sugar, the 
presence of that substance in it is doubtful. Having no more material at my dis- 
posal, I was unable to confirm my observation. 
15. On certain processes formed by Cerapus on Tubularia indivisa. 
By Professor McInrosu, M.D., LL.D., F.R.S.} 
The members of the domicolous subdivision of the amphipodous crustaceans 
are characterised by the very general habit of forming tubes of various kinds, 
which constitute dwellings as well as nests for the young. Others, again, excavate 
tunnels in tough clay or mud, like Corophium. The subject of the present remarks, 
which is apparently closely allied to Cerapus difformis, and very prettily barred 
with red on the antenne, constructs groups of flexible tubes, which vary in 
diameter according to the size of the occupant, on stems of Tubularia indivisa, very 
much as Stimpson describes in his Cerapus rubricornis on the shores of Grand 
Manan. Instead of being formed, however, as Stimpson says, of ‘ fine mud and 
some animal cement,’ those of the British species have, in addition, grains of sand, 
bristles, and spines of annelids, hairs of sea-mice, and many fine horny fibres 
apparently derived from the byssi of horse-mussels. 
On the same stems of 7'ubularia are certain remarkable processes which project 
from the ccencecium like branches. These filamentous structures are of a dull 
greyish hue (that of the mud), and are very slightly tapered distally. The basal 
region, however, is distinctly larger, especially where fixed to the zoophyte. Their 
length varies from three to four inches, and all seem to be incomplete. They are 
smoothly rounded, and resemble the fine muddy tubes secreted by certain annelids ; 
but they are quite solid, and composed of the same constituents as the tubes above- 
mentioned, though perhaps the foreign bodies such as bristles and spines are more 
conspicuous. ‘These, moreover, are neatly arranged with their long axes parallel 
to that of the process, and especially abound towards the base of the filament, 
which thus is more rigid and tougher than the distal region, into the composition 
of which mud, sand, and the secretion chiefly enter. In consequence of this 
structure, the distal region slightly curves downward in the ordinary position in 
the water, while the proximal stands stiffly outward. These processes are generally 
fixed to the main stem of the Tubularia, though occasionally they spring from the 
} This and the three following published with figures in the Ann. Nat. Hist. 
for December, 1885. 
