50 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



the water, and may readily be skimmed off with the organ- 

 isms upon them. 



The test is rare among shells obtained by the usual pro- 

 cess of drying and floating from sand. Firstly because the 

 form is most frequent on mud, and secondly owing to the 

 great tenuity of the test, which is little more than mem- 

 branous, and generally collapses when dry. 



Habitat. — Muddy shores round the coast generally, 



Squamulma lavis, Schultze. 



A minute scale-like form, round, or irregular in outline, 

 and with simple, often central, circular orifice, occurs 

 occasionally on the polypidoms of Zoophytes from the coast 

 generally. I have also collected living examples. It corres- 

 ponds most nearly to the above named species. 



Nuhecularia lucifuga, Defr, 



I have referred provisionally to the genus Nuhecularia, 

 several obscure adherent and detached forms from the mouth 

 of the Dee and other localities in the district, but I am in 

 some doubt as to whether they are not merely aberrant 

 examples of other genera. 



Biloculina ringens, Lamk. 



This species is generally distributed round the coast, but 

 by no means common. It occurs also in the river Dee. 

 The allied species B. elongata, d'Orb. and B. depressa, 

 d'Orb. are of much more frequent occurrence. 



Spirolocidina spp., d'Orb. 



S, limhata, S. planulata, and S. excavata, occur sparingly 

 over the whole area included within the limits of the Com- 

 mittees' observations, extending even in weaker form into the 

 estuary of the Dee, from which locality I have also obtained 

 a single example of the rare form S. acutimargo, Brady. 

 Messrs. Balkwill and Wright also report the occurrence of 

 this species in Dublin Bay. 



