118 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
of Asterina gibbosa, were seen. One specimen of Avwto- 
lytus incertus was noted. On March 24th Cirripede 
nauplii were present in such large numbers that the water 
in the shore pools appeared to be muddy, and the quantity 
of Diatoms and other Algsz reached its maximum about 
the same date. 
On April 14th two specimens of a minute Planarian 
worm (Plate VI., fig. 1), and a single specimen of the larva 
of Loxosoma, were noted. Post-larval stages of Polycheeta 
(Pl. VL., figs. 7 and 8), and nauplii of Cirripedia and Cope- 
poda were very numerous. A general increase in numbers 
was noted on the 27th, and the Hydromeduse Saphema 
mirabilis and Phialidiwm cymbaloideum appeared. 
On May 28rd a Diatom (Riizosolenia) was present in 
enormous numbers. On the 29th the Medusze Phialidiwm 
temporarium, P. cymbaloidewm, Laodice calcarata, Sarsia 
tubulosa, and Pilema octopus, and the Siphonophore Agal- 
mopsis elegans were all represented, as also was the 
interesting larva of Cerianthus known as Arachnactis 
bourner. On the same date Autolytus cornutus was 
represented by half-a-dozen specimens, and the post- 
larval stage of Pectinarva was noted for the first time this 
year. Sagitta, represented by a few speciinens on the 
23rd, was fairly common on the 29th. On the latter date 
Nauplii of several species were still abundant, and several 
Megalopas were noted. Ovzkopleura was common. 
On June Ist the Hydromeduse, especially Phialidtum 
temporarium, and the Siphonophore Agalmopsis elegans 
were more numerous, and Pleuwrobrachia appeared in great 
force. Sagitta and Tomopteris were common. Post- 
larval stages of Polycheta and Naupliu had almost dis- 
appeared, while Zoez of several species were tolerably 
common. On this date the Actinotrocha larva of Phoronis, 
one of the most interesting additions to our lists, was seen 
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