'264 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



2. Sub-family: — Serpulin^e. 



Filigrana implexa, Berkeley. 



Hab: N. E. coast of Anglesey and south coast of Isle of 

 Man — Low water to 18 fms. 



Serpula vermicular is, (Ellis). 



Hab : Deep water area of Irish Sea, about 20 fms. 



* Serpula reversa, Montagu. 



Hab:— P, 6, 12, 13. 



From low water mark to 22 fathoms. The most abun- 

 dant deep water Serpulid. I have seen a crab dredged 

 up carrying two or three large ones upon its carapace ; 

 the usual situation is upon shells of dead molluscs. 

 Probably the Eupomatus pectinatus of Philippi. 



Pomatoceros triqueter, (Linn). 



Hab: P, 5, 10. Common on the littoral, extending 

 more sparingly to deep water — 18 fms. 



Apparently a variable species— in the colour of the bran- 

 chiae and in the shape of the operculum. Cunningham 

 and Eamage are in error in giving S. conica, Johnston, as 

 a synonym, unless indeed it be that the latter is found 

 to be a variety P. triqueter. In any case Johnston's figure 

 of the operculum of S. conica is not a typical form of that 

 of P. triqueter, while that figured under the name of S. 

 armata is perfectly characteristic, agreeing even with C. 

 and R.'s own delineation of the operculum of the present 

 species. 



Spirorbis horealis, Morch. 



Hab : — On all our rocky shores and wherever it can find 

 lodgment, characteristic of the littoral — Fug us serratus is 

 its commonest host. 



Spirorbis lucidus, (Mont), Morch. 



The characteristic Sjrirorbis of deep water. Its tiny 

 translucent spirals frequently occur in rows along the stalk 

 and branches of Sertularia dredged from various depths. 



