310 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



of Asterina gibbosa, were seen. One specimen of Auto- 

 lysis 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 Algae 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 Polychaeta 

 (PI. VI., 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 Hydromedusse Baphenia 

 mirabilis and Phialidium cymbaloideum appeared. 



On May 23rd a Diatom (Bhizosolenia) was present in 

 enormous numbers. On the 29th the Medusae Phialidium 

 tem/porarium, P. cymbaloideum, 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 

 bournei. On the same date Autolytus cornutus was 

 represented by half-a-dozen specimens, and the post- 

 larval stage of Pectinaria was noted for the first time this 

 year. Sagitta, represented by a few specimens 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. Oikopleura was common. 



On June 1st the Hydromedusae, especially Phialidium 

 temporarium, and the Siphonophore Agalmopsis elegans 

 were more numerous, and Pleurobrachia appeared in great 

 force. Sagitta and Tomopteris were common. Post- 

 larval stages of Polychaeta and Nauplii had almost dis- 

 appeared, while Zoeae 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 



