Ill 



Family Y. Canalifeha. 



From morn till dewy eve sat the pale scribe 

 WitMn some cloister grey ; his ready hand 

 Tracing on vellmn symbols, saintly forms, 

 Or picturing deeds by honom-ed ones of old ; 

 And deep within the waters dwelt his co-mate, 

 Purpurea, such her name, whose woudrous art 

 Produced that deep cerulean perfect blue. 

 Which men call Tman. 



SheU canaHculatecl, canal sometimes very long, sometimes 

 very short ; lip not changing wit\\ age. 



The family Canalifera comprises an extensive range of 

 mollusks, whose shells exhibit great diversity of structure, 

 but are all more or less channelled at the base. This channel 

 is, however, extremely variable : in some of the Miirices it is 

 of considerable length and tenuity, whilst in most of the 

 Hanella and CancellaricB it is comparatively obsolete. 



"Other characters of equal importance are distinctive 

 of groups. The genera Fasciolaria, Cancellaria, and Tur- 

 binella are characterized by a row of oblique plaits on the 

 columella, somewhat after the manner of the Volutes and 

 Mitres ; and the Tritons, Mimces, and RaneUce are distin- 



