MOLLUSCOIDA. 
43 
Family Scrupariadae. 
Genus Scruparia, Oken. 
Scruparia chelata , L.; Busk, Catal. p. 29, pi. 17. f. 2. 
Common on Ceramium rubrum , Sertularia pumila , and 
other algae 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 Bicellariadse. 
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 jlabellata (J. V. Thompson, MS.), Gray; Busk, Catal. 
p. 44, pis. 51 & 52. 
On Flustrafoliacea from deep water; rather rare. 
Bugula avicularia , Pallas ; Busk, Catal. p. 45, pi. 53. 
From the coralline ground, on Flustra truncata ; not 
common. 
G 2 
