86 BULLETIN OF THE LIVERPOOL MUSEUMS. 
lived for some time and deposited spawn, which, as is unfortunately usually 
the case, did not further develop. Several masses of the ribands of spawn 
of A. tuberculata were specially noticeable. One of these was carefully detached 
complete and brought to the Laboratory for the purpose of mounting along- 
side the Nudibranch as a Museum preparation. The ova are deposited by this 
species, as is well known, in a broad, concentrically coiled, gelatinous riband, 
one edge attached, the other free and slightly wavy. The length of the 
riband in this mass was found to be 29 inches on the outer, and 21 inches on 
the inner or attached margin, while the breadth varied from }2-in. to };-in. 
According to Alder and Hancock (JJonograph of the Nudibranchiate Mollusca ), 
a riband 9 inches in length contains about 50,000 ova, so that the number in 
our specimen must be enormously great. 
Another interesting species found in abundance was the Amphipod 
Corophium grossipes. Attention was first attracted to it by the peculiar 
appearance of many of the mud banks, due to a vast number of small excres- 
cences projecting above the surface. A closer examination revealed each 
excrescence to be the elevated entrance to a minute burrow from one to 
one and a half inches deep, in which one of these small Amphipods was 
usually found. On some of the mud containing them being placed in a 
tank in the Aquarium, the animals were soon seen busily engaged making 
new burrows. In this operation they bring all their appendages into use, 
pushing their long antenne first into the mnd, and throwing it sideways 
with their feet. One burrow, which happened to be made against the glass, 
was observed throughout its entire construction, and the animal was on 
several occasions seen pushing its way along. The burrow was of a U-shape 
with two openings, and only extended down about one inch. This is con- 
firmatory of other observers, who state that Corophium grossipes does not 
burrow very deeply, and is only found in the soft surface mud. 
A particularly fine colony of the somewhat rare Zoophyte, Garveia nutans, 
attached to a piece of sandstone, and specimens of both the white and deep- 
orange varieties of Alcyonium digitatum, fixed in Formal in an expanded 
condition, may be specially mentioned among other interesting forms obtained 
for the British Collection and the Aquarium. 

