2 JOHN RENNIE, D.Sc. 
a 
below freezing point, and the water clear, it could be roughly examined before removal. 
The organism appeared to be an inert and delicate structure, about a quarter of an 
inch in diameter, which appeared to be uniform throughout its entire length, rounded 
at both ends, translucent and light brown in colour for the most part, though im 
places almost colourless. This specimen was secured, but in fragments, preserved in 
picrie acid, and transferred to alcohol. Unfortunately the bottle in which it was 
kept was one of the only two which failed, and some months later was found to be 
7. 5a) J 5b) 
JRitchie del. ButterWorTife 
EXPLANATION OF FIGURES. 
1, Piece of Tentacle, (Natural size.) 
2: 5 , enlarged, showing Stinging Areas. x 18. 
3. Transverse section: (a) Ectodermal Canal; (b) Endodermal Canal. x 40. 
4, Stinging Areas, showing Cnidoblasts. x 280. 
5. (a) Cnidoblast, with coiled lasso. 
(bd) y , With lasso shot out. x 500. 
practically dry ; the specimen was then replaced in alcohol and kept under observation. 
No other specimen was taken, but from the date of its first capture on Lieut. Barne’s 
sounding-line to the close of our stay in McMurdo Bay it occurred on the 
lines of the nets and traps frequently, probably not less than fifty times. It was 
usually much attenuated by being drawn somewhat rapidly through the water, and 
shredded on the iron bar over which the line ran. This last piece of apparatus was an 
essential, as the line has to be laid straight out on the ice. A wet line at those 
temperatures can neither be coiled nor wound on a winch. The organism usually 
