MOLLUSCOIDA. 43 



Family Scrupariadae. 

 Genus Scruparia, Oken. 

 Scruparia chelata, L. ; Busk, Catal. p. 29, pi. 17. f. 2. 

 Common on Ceramium rubrum, Sertularta pumila, and 

 other algaj and zoophytes between tide-marks. 



Genus Hippothoa, Lamx. 



Hippothoa catenularia, Jameson ; Busk, Catal. p. 29 

 pi. 18. f. 1&2. 



On stones and shells from deep water ; less common than 

 the following species. 



Hippothoa divaricata, Lamx. ; Busk, Catal. p. 30, 

 pi. 18. f. 3 & 4. 



On stones and shells from deep water ; abundant. 



Family Gemellariadae. 



Genus Gemellaria, Sav. 



Gemellaria loricata, L. ; Busk, Catal. p. 34, pi. 45. f. 5 & 6. 



Abundant in deep water, and thrown on shore in masses 

 after storms. 



Family Bicellariadae. 



Genus Bicellaria, De Blainville. 



Bicellaria ciliata, L. ; Busk, Catal. p. 41, pi. 34. 



Frequent on stones and shells from the coralline ground. 



Genus Bugula, Oken. 



Bugula flabellata (J. V. Thompson, MS.), Gray ; Busk, Catal. 

 p. 44, pis. 51 & 52. 



On Flustra foliacea from deep water; rather rare. 



Bugula avicularia, Pallas ; Busk, Catal. p. 45, pi. 53. 



From the coralline ground, on Flustra truncata; in it 

 common. 



g2 



